Projectile impact mitigation system with active inflatable origami tessellation armor

Abstract

A projectile impact mitigation system (100) is disclosed for wearable and structural protection. The system (100) includes a flexible armor layer (110) having a ballistic base sheet (112) and an array of inflatable origami-folded cells (120). Each foldable cell (120) expands from a collapsed to a three-dimensional configuration through an inflation assembly (130) comprising a micro-pyrotechnic squib (132) or a controllable gas valve (136). A sensor system (140) with a multi-frequency radar unit (144) detects an incoming projectile and transmits trajectory data to an electronic control circuit (150). The control circuit (150) computes a predicted impact point (156) and time-to-impact (154) and selectively activates corresponding inflation assemblies (130) just before impact. The expansion of the selected foldable cells (120) produces a counteracting force that decelerates or deflects the projectile while residual energy is absorbed by the base sheet (112), providing predictive, localized, and reusable ballistic protection.

Description

[0001] PROJECTILE IMPACT MITIGATION SYSTEM WITH ACTIVE INFLATABLE ORIGAMI TESSELLATION ARMOR

[0002] FIELD OF THE EMBODIMENTS

[0003] The present disclosure relates to the field of ballistic impact mitigation and protective systems. It more particularly pertains to active protection arrangements incorporating sensor-controlled inflatable or expandable structures formed using origami-based tessellation geometries for dynamically countering and dissipating the energy of incoming projectiles or high-velocity impacts. The disclosure encompasses systems and methods in which multi -frequency sensing, real-time control, and localized inflatable units cooperate to achieve adaptive resistance against ballistic or kinetic threats on flexible, rigid, or composite protective surfaces.

[0004] BACKGROUND OF THE EMBODIMENTS

[0005] Bullet-resistant armor has traditionally relied on passive materials such as aramid fiber layers and hard ceramic or metal inserts to stop projectiles. Standard soft body armor made from woven or non-woven aramid fiber stacks can absorb handgun rounds by distributing and deforming the bullet’s energy, but higher-velocity rifle rounds often necessitate rigid trauma plates, adding significant weight and stiffness. Even when penetration is prevented, the blunt impact can cause serious injury, including broken ribs, organ damage, and concussion, due to the force transmitted to the body. Simply increasing the thickness or number of layers yields diminishing returns and results in impractical bulk. Thus, there has been a longstanding need for armor that is both lightweight and flexible while capable of mitigating impact force more effectively.

[0006] Various innovations have been explored in the armor and protective gear field. For example, shear-thickening fluids and “liquid armor” concepts have been introduced to create materials that remain flexible but become rigid upon impact. In one notable military research program, a magnetorheological fluid-based suit was proposed in which an electrical current instantaneously transforms the fluid armor from liquid to solid, absorbing ballistic impacts. While promising, such systems require power and complex new materials, and they remain under development. Another line of development involves active or reactive armor that proactively responds to threats. In armored vehicles, active protection systems use sensors to detect incoming projectiles such as rockets or missiles and trigger countermeasures — for instance, detonating explosive charges to disrupt or deflect the threat. However, explosive reactive armor is too dangerous for personal bodyarmor use. Non-lethal approaches have also been attempted. Patent literature discloses a radar-based personnel protection system that, upon detecting an incoming bullet via Doppler radar, rapidly deploys an airbag made of ballistic fabric to interpose a cushion between the projectile and the person. In that system, an aramid fiber airbag inflates in about 20-30 milliseconds to catch or deflect the bullet, significantly reducing its energy. While this concept demonstrated that an incoming round could be detected and countered with an automated response, it essentially creates a one-time-use, large ballistic cushion. The device may be bulky and is not integrated seamlessly into everyday wearable armor. It also requires the airbag to cover a broad area, which can be impractical for constant wear.

[0007] Inflatable armor concepts have also been proposed to lighten traditional vests. For instance, one design uses a pre-inflated flexible plenum encased in ballistic fabric; a bullet passing through the air-filled layer is destabilized and slowed as it punctures the plenum and interacts with tensioned fibers or packets inside. This approach adds protection without heavy plating, but it is a passive system, the air bladder is always inflated during use and not dynamically changed in response to a particular impact. It cannot target a specific threat or adapt its configuration in real time.

[0008] Additional approaches have investigated phase-changing and energy-absorbing materials, such as viscoelastic polymers, polymeric foams, and metallic or composite honeycomb cores, to dissipate impact energy through compression or deformation. These materials offer partial protection from blunt trauma but act passively and cannot respond adaptively to high-speed threats. Moreover, such materials tend to permanently deform or lose integrity after a single impact, limiting their reuse and long-term reliability. Other designs using layered composite sandwiches or fluidic damping structures have attempted to improve impact dissipation but are typically heavy, rigid, and unsuitable for integration into wearable armor.

[0009] Beyond ballistics, wearable airbags and smart protective wear have become common in other domains. Modern motorcyclists and extreme-sports athletes use jackets or collars with integrated accelerometers that trigger airbag inflation during a crash, cushioning the fall. In one such system, an airbag collar remains deflated and out of the way until sensors detect an impending accident; it then instantly inflates around the head to prevent impact trauma. Similarly, motorcycle airbag vests deploy gas inflators when sudden deceleration or tilt indicates a crash. These systems demonstrate the benefit of active impact mitigation in wearables; however, they are geared toward relatively slow-moving collision scenarios, such as falls or vehicle crashes, rather than high-speed projectiles. They also typically inflate the entire garment or a large section, not a tightly localized area.

[0010] Some research groups have explored hybrid mechanical systems that combine passive textile armor with mechanically actuated elements, such as spring-loaded plates or expanding panels that deploy outward upon sensing impact. While these systems can create limited counterpressure, they rely on mechanical inertia or delayed triggers and lack the precision and timing required for real-time ballistic interception. Their complexity, limited responsiveness, and inability to differentiate between harmless stimuli and true threats make them unsuitable for practical use.

[0011] Recently, researchers have explored origami -inspired designs for deployable protection. Origami techniques allow a structure to remain compact and then expand rapidly into a rigid form. A team developed a foldable origami ballistic shield for law-enforcement use that can accordion-fold for easy transport and then unfold into a full-sized bullet-resistant barrier. That device uses panels of bulletproof material arranged in an origami crease pattern, providing cover to multiple people when expanded. While ideal as a portable shield, it is manually deployed and not intended to react instantaneously to a sudden gunshot. Nonetheless, it highlights how folded geometries can impart strength and energy absorption when extended. More recently, some experimental studies have combined folded or cellular geometries with compressed gas activation, where gas expansion can alter the stiffness or curvature of a layered panel. These attempts demonstrate the potential of foldable protective elements but lack integration with predictive sensing systems and control electronics. The response time of such assemblies remains insufficient for high-speed projectile interception, and the inflation process is often uniform across the entire surface, rather than being localized to the impact area.

[0012] Despite this progress in related fields, no existing wearable armor provides the combination of features needed for true real-time ballistic mitigation on the body. Traditional vests remain passive and cannot actively push back against a bullet. The airbag shield concept introduced active response but was effectively an externally mounted cushion and lacked fine localization and multi-use capability. Foldable shields and inflatable armor panels improve portability and coverage but do not include smart sensing or automated actuation tied to threat detection. Systems based on phase-change materials, foams, or honeycomb cores remain limited to passive damping and are not suited to instantaneous, repeatable reactions. Hybrid mechanical systems still rely on slow mechanical actuation and are prone to false triggers. Moreover, prior systems often use a single large protective element, such as one large airbag or inflatable bladder covering the torso, which, once deployed, may obstruct the wearer or be unusable for subsequent threats.

[0013] Accordingly, there is a need for a wearable impact-mitigation system that overcomes aforementioned limitations

[0014] OBJECTIVE OF THE EMBODIMENTS

[0015] The principal object of the present disclosure is to provide a projectile impact mitigation system that actively reduces, dissipates, or counteracts the kinetic energy of high-speed projectiles in real time.

[0016] Another object of the disclosure is to provide a protective system capable of predicting the trajectory and point of impact of an incoming projectile and deploying localized countermeasures before the projectile makes contact. Another object of the disclosure is to provide a protective arrangement comprising multiple inflatable origami tessellation cells that can be selectively and independently activated to create localized zones of resistance against an incoming threat.

[0017] Another object of the disclosure is to provide a lightweight and flexible armor configuration that remains comfortable and pliable under normal conditions yet transforms momentarily into a rigid or energy-absorbing structure upon detecting a ballistic threat.

[0018] Another object of the disclosure is to provide a multi-layer protective structure having a combination of ballistic materials and inflatable origami -based cells that together achieve enhanced energy absorption without excessive thickness or rigidity.

[0019] Another object of the disclosure is to provide a sensor-based detection mechanism employing multi -frequency radar, ultrasonic, optical, or equivalent sensing technologies to detect, track, and determine the speed, direction, and position of an incoming projectile with high accuracy.

[0020] Another object of the disclosure is to provide a computational control unit configured to process real-time sensor data, predict projectile trajectory, calculate impact time, and activate specific origami cells to coincide with the expected impact moment.

[0021] Another object of the disclosure is to provide a method for mitigating projectile impact, which includes detecting the projectile, computing its trajectory, identifying its impact location, and actuating one or more inflatable origami cells in anticipation of the impact to minimize the transmitted force.

[0022] Another object of the disclosure is to provide a selective and localized response mechanism, such that only the region exposed to the predicted threat is activated, thereby conserving energy and maintaining the flexibility of surrounding areas.

[0023] Another object of the disclosure is to provide a multi -hit capable protective system wherein multiple cells or zones can operate independently, allowing sequential or simultaneous protection against multiple projectiles or repeated impacts. Another object of the disclosure is to provide a resettable and reusable protection system capable of being re-pressurized, re-armed, or restored to its operational condition following one or more activation events.

[0024] Another object of the disclosure is to provide an energy -efficient active protection mechanism that requires minimal electrical power for detection and actuation, making it suitable for long-duration use in portable or wearable applications.

[0025] Another object of the disclosure is to provide a safe, non-explosive actuation system utilizing pyrotechnic squibs, pressurized gas cartridges, or micro gas generators, designed to inflate the origami cells without causing fragmentation or secondary hazards.

[0026] Another object of the disclosure is to provide a precisely timed inflation mechanism wherein the actuation delay, inflation pressure, and deployment duration are synchronized with the projectile’s velocity and distance.

[0027] Another object of the disclosure is to provide a mechanically efficient origami tessellation structure, based on geometric folding patterns such as square, triangular, or hexagonal tessellations, to achieve rapid deployment, load distribution, and high stiffness-to-weight ratio.

[0028] Another object of the disclosure is to provide a compact and modular protective assembly that allows ease of fabrication, maintenance, and replacement of individual units without affecting the entire armor system.

[0029] Another object of the disclosure is to provide a system capable of adaptive performance, wherein operating parameters such as actuation pressure, inflation duration, and radar sensitivity can be modified or tuned according to the threat environment.

[0030] Another object of the disclosure is to provide a protective arrangement suitable for wearable applications such as vests, helmets, and tactical gear, as well as nonwearable installations including vehicle panels, aircraft structures, and stationary barriers.

[0031] Another object of the disclosure is to provide a highly responsive protection technology capable of operating within milliseconds, allowing reliable defense against handgun, rifle, and fragmentation threats. Another object of the disclosure is to provide a system capable of reducing blunt trauma, distributing residual forces evenly, and minimizing backface deformation transmitted to the wearer’s body.

[0032] Another object of the disclosure is to provide a lightweight, ergonomically compatible, and user-comfortable design, suitable for continuous wear without restricting movement, posture, or breathing.

[0033] Another object of the disclosure is to provide a compact electronic and mechanical assembly that can be embedded within conventional ballistic garments without significant alteration to form factor or flexibility.

[0034] Another object of the disclosure is to provide a low-maintenance and durable protection system having robust components resistant to environmental stress, vibration, and temperature variations.

[0035] Another object of the disclosure is to provide a real-time communication and feedback system capable of monitoring operational status, activation history, and diagnostic parameters to ensure readiness.

[0036] Another object of the disclosure is to provide an active armor solution that combines predictive sensing, rapid mechanical response, and structural energy absorption to achieve higher ballistic efficiency compared with conventional passive armor.

[0037] Another object of the disclosure is to provide a cost-effective and scalable protective technology suitable for personal safety, defense, law enforcement, and infrastructure protection applications.

[0038] SUMMARY OF THE EMBODIMENTS

[0039] The present disclosure relates to a projectile impact mitigation system (100) designed to provide real-time protection against high-speed projectiles. The system (100) includes a flexible armor layer (110) having a ballistic base sheet (112) and an array of origami-tessellated foldable cells (120). Each foldable cell (120) is formed from a fold-patterned material section (122) with crease lines (124) defining a compact collapsed state and an expandable three-dimensional state. An inflation assembly (130), including either a micro-pyrotechnic squib (132) or a controllable pressurized gas valve (136), rapidly inflates the corresponding cell (120) upon activation. A sensor system (140) comprising at least one multi -frequency radar unit (144) detects an incoming projectile, determines its velocity and trajectory, and transmits this data to an electronic control circuit (150). The control circuit (150) calculates a predicted impact point (156) and time-to-impact (154), then selectively activates the inflation assembly (130) for one or more foldable cells (120) covering the predicted impact area. The synchronized activation results in localized expansion of the designated cells (120), which project outward to counteract the projectile’s kinetic energy, thereby reducing transmitted impact force and enabling multi -hit protection.

[0040] The predictive control and actuation system (200) coordinates the operation of the protective system (100). The system (200) includes a radar sensing module (202) for continuous detection of projectile data and a processing and control unit (204) that computes the predicted impact point (204c) and time-to-impact (204d). Based on this data, the control unit (204) identifies one or more protective cells (210) near the predicted impact point and generates actuation signals (212) to trigger corresponding inflation assemblies (214). A synchronization controller (206) manages activation timing with microsecond precision to ensure that the targeted protective cell (210) reaches full expansion at the exact instant of projectile arrival. A feedback interface (208) receives operational data, such as inflation pressure or deformation characteristics, and dynamically adjusts subsequent activations to optimize response for varying projectile speeds and angles of approach.

[0041] The foldable impact-mitigating armor assembly (300) provides a structural energy absorption mechanism. The assembly (300) comprises a ballistic base layer (302) and a deployable panel (304) including multiple foldable cells (306) formed in a tessellation pattern with crease lines (308). Each foldable cell (306) can expand independently through one or more gas inlets (310) that deliver pressurized gas to specific regions of the armor. The tessellation pattern may be a square grid, hexagonal array, Miura-ori fold, or waterbomb base configuration, enabling planar storage and volumetric deployment under impact conditions. Expansion of the foldable cells (306) results in localized stiffening and energy dispersion across the armor, thereby reducing the impact force transmitted to the base layer (302). The assembly (300) is lightweight, flexible, and suitable for incorporation into personal armor, helmets, and structural or vehicular protection systems.

[0042] The method (400) describes the operational sequence for mitigating the impact of a high-speed projectile using the system (100). The method (400) includes monitoring a surrounding area with the sensor system (200), processing projectile data in the control unit (204) to determine the predicted impact location (204c) and time-to-impact (204d), and activating an inflation assembly (214) associated with one or more foldable cells (120) prior to the projectile’s arrival. Each selected foldable cell (120) inflates from a flat, collapsed configuration into an expanded three-dimensional form by releasing gas from a gas source (216), projecting outward from the armor surface (110). The expansion of the foldable cell (120) creates a counteracting force that decelerates or deflects the incoming projectile, while residual energy is absorbed by the ballistic layer (112) positioned behind the foldable cells (120). The sequence of monitoring, processing, activation, and inflation is executed within a time interval shorter than the projectile’s time-to- impact, allowing predictive, localized, and repeatable impact mitigation.

[0043] The disclosed system (100), in combination with the control system (200), armor assembly (300), and operational method (400), provides an intelligent, adaptive, and lightweight protection solution capable of dynamically responding to high- velocity projectile threats in real time.

[0044] BRIEF DESCRIPTION OF THE DRAWINGS OF THE EMBODIMENTS

[0045] Other objects, features, and advantages of the embodiment will be apparent from the following description when read with reference to the accompanying drawings. In the drawings, wherein like reference numerals denote corresponding parts throughout the several views:

[0046] Figure 1A shows an overall view of the projectile impact-mitigating protective system (100) comprising the flexible armor layer (110) with ballistic base sheet (112), origami-tessellated foldable cells (120) having fold-patterned sections (122) and crease lines (124), each linked to an inflation assembly (130) with squib (132), gas canister (134) or valve (136). The sensor system (140) with radar (144), acoustic (146) and optical (148) sensors connects to an electronic control circuit (150) having processor (152) executing a synchronization algorithm (158) to compute impact point (156) and time-to-impact (154).

[0047] Figure IB shows an exploded perspective of one foldable cell (120) showing fold- patterned material (122), crease lines (124), tethering members (138), and connection to inflation assembly (130) components (132-136).

[0048] Figure 2A shows a predictive control and actuation system (200) including radar sensing module (202), processing and control unit (204) with processor (204a) and memory (204b), synchronization controller (206), feedback interface (208), protective cells (210), actuation signals (212), inflation assemblies (214), and shared gas source (216).

[0049] Figure 2B shows timing and logic representation illustrating computation of impact point (204c), time-to-impact (204d) and execution of synchronization algorithm (158); showing radar detection (202), processing (204), signal generation (212) and actuation of inflation assemblies (214) by controller (206).

[0050] Figure 3A shows foldable impact-mitigating armor system (300) having ballistic base layer (302), deployable panel (304) with foldable cells (306) and crease lines (308); gas inlets (310), micro-valves (312), manifold (314) and reinforcements (316) integrated with base sheet (112).

[0051] Figure 3B shows sectional detail of gas-distribution network showing inlets (310), valves (312), manifold channels (314) and gas generators (316) feeding foldable cells (306) for localized inflation.

[0052] Figure 3C shows representative tessellation geometries of foldable cells (306), including square grid, hexagonal, Miura-ori and waterbomb base patterns defined by crease lines (308).

[0053] Figure 4A shows a flowchart of operational method (400) showing sequential steps (a-f): monitoring via radar (202); processing in control unit (204) to determine impact point (204c) and time-to-impact (204d); activation of inflation assemblies (214); gas release from source (216) to inflate foldable cells (120); projectile counteraction; and energy absorption by ballistic layer (112) followed by reset. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0054] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

[0055] Referring to Figures 1 A and IB, the projectile impact-mitigating protective system (100) is designed as an intelligent, multilayered, and adaptive defense structure capable of real-time response to ballistic or high-velocity impact threats. The system (100) may be configured for a wide range of applications, including personal protective gear such as body armor, limb guards, and helmets, as well as structural and vehicular protection panels. In its wearable embodiment, the system conforms to the anatomical curvature of a human torso, shoulder, or extremity; in vehicular or stationary configurations, it conforms to curved panels, bulkheads, or exoskeleton shells.

[0056] The system (100) comprises a flexible armor layer (110) that serves both as a carrier substrate and as the first stage of energy absorption. The armor layer (110) is designed for high flexibility under normal conditions and localized stiffening during activation. It includes a ballistic base sheet (112) fabricated from high- strength composite laminates such as aramid (Kevlar™ or Twaron™) fabrics, ultra- high-molecular-weight polyethylene (UHMWPE) sheets, ceramic-reinforced polymer composites, or metal-polymer hybrid laminates bonded using thermoset or thermoplastic resins. The sheet (112) provides passive ballistic protection and also functions as a mounting foundation for a distributed array of origami -tessellated foldable cells (120), which form the active protective layer.

[0057] Each foldable cell (120) is produced from a fold-patterned material section (122) that contains a precisely engineered network of crease lines (124) defining both mountain and valley folds. These folds may be laser-etched, thermally impressed, or mechanically pre-creased to achieve repeatable folding kinematics. The geometry of each cell allows it to transition between a collapsed, nearly planar state and an expanded three-dimensional shape — such as a pyramid, dome, frustum, or prismatic volume — depending on tessellation type. The foldable cells (120) may be shaped according to Miura-ori, waterbomb base, hexagonal, or square-grid tessellation schemes, each providing distinct mechanical advantages. The Miura- ori offers high areal compaction and linear expansion; the waterbomb base provides isotropic deformation; and the hexagonal pattern yields efficient edge sharing and structural continuity.

[0058] The foldable cells (120) are arranged across the armor layer (110) in a continuous matrix or modular tile format. Each cell may operate independently or cooperatively with its neighbors through coordinated control signals. The inter-cell regions consist of flexible joints or elastomeric bridges allowing local movement without delamination. An outer textile or elastomeric cover may optionally encapsulate the armor layer (110), providing environmental protection against dust, moisture, chemical exposure, or ultraviolet degradation. This cover also prevents snagging or abrasion of the folding surfaces during repeated deployments and retractions, thereby extending service life.

[0059] Each foldable cell (120) is operatively coupled to a dedicated inflation assembly (130) engineered for sub -millisecond actuation. As illustrated in Figure IB, the inflation assembly (130) may contain one or more of the following: a micro- pyrotechnic squib (132), a pressurized gas canister (134), or an electronically controlled valve (136) connected to a shared gas manifold. The squib (132) comprises a miniature gas generator containing energetic compositions such as sodium azide, guanidine nitrate, or nitroguanidine-based propellants, which decompose rapidly upon electrical ignition to generate high-pressure nitrogen or argon gas. Alternatively, the gas canister (134) may store inert gases such as compressed nitrogen, carbon dioxide, or helium, released by actuating the valve (136) through a micro-solenoid or piezoelectric trigger. The gas thus produced or released enters the internal cavity of the foldable cell (120), causing instantaneous expansion along the pre-defined crease lines (124). The inflation process is controlled to achieve a specific volume ratio and pressure, typically in the range of 1.5 - 3 bar, sufficient to rigidize the cell walls without structural rupture. Within each cell, tethering members (138) — constructed from high-modulus aramid threads, braided polymer cords, or carbon-fiber filaments — are anchored between the base and apex surfaces. These members limit maximum displacement, maintain geometric symmetry during inflation, and ensure consistent deformation under dynamic loading. By distributing tensile stress across the cell structure, they prevent localized failure at fold junctions and increase repeatability of deployment.

[0060] Electrical and data connections between the inflation assemblies (130) and the main control electronics are realized through flexible printed conductors embedded within the armor layer (110). These conductors are coated with insulating elastomers to maintain electrical integrity under bending and to resist heat from nearby pyrotechnic elements.

[0061] The sensor system (140) forms the sensory front-end of the system (100) and continuously monitors the space ahead of the armor surface for incoming threats. The sensor system (140) includes one or more radar units (144) operating in the microwave or millimeter-wave range (e.g., 24 GHz, 60 GHz, or 77 GHz bands) capable of detecting and tracking high-speed projectiles by analyzing Doppler shifts and frequency-modulated continuous-wave (FMCW) reflections. Each radar unit (144) emits electromagnetic pulses or continuous beams, receiving reflected signals from moving projectiles, and computes their range, velocity, and angular trajectory with microsecond latency. For enhanced detection reliability, the radar data may be corroborated by acoustic sensors (146) that sense sonic or supersonic shock waves, and by optical or infrared sensors (148) that detect thermal or light -intensity variations caused by projectiles in flight. These sensors operate synchronously or in data-fusion mode to provide high-confidence threat identification even in adverse environmental conditions. Sensor outputs are continuously relayed to the electronic control circuit (150) embedded within the armor structure or housed in an adjacent control module. The control circuit (150) includes a high-speed processor (152), volatile and nonvolatile memory, and dedicated signal-conditioning electronics. The processor (152) executes an onboard synchronization algorithm (158) that processes sensor data to determine the predicted impact point (156) and time-to-impact (154) relative to the coordinate geometry of the armor layer (110). The prediction algorithm employs kinematic modeling, vector extrapolation, and probabilistic filtering (e.g., Kalman or particle filters) to achieve accurate results within microseconds of projectile detection.

[0062] Once prediction is complete, the control circuit (150) identifies which foldable cells (120) lie within or adjacent to the predicted impact zone and transmits activation signals to the corresponding inflation assemblies (130). The algorithm (158) automatically compensates for inflation delay, ambient temperature, and system latency to ensure that each targeted cell completes its deployment cycle exactly when the projectile reaches its point of contact. The inflation typically occurs within 1 - 3 milliseconds, depending on the cell volume and gas type.

[0063] During operation, the targeted foldable cell (120) expands rapidly outward from the surface of the armor layer (110), forming a protruding three-dimensional barrier that meets the projectile fractionally before impact. This outward movement generates a reactive counter-momentum that diminishes the projectile’s kinetic energy by opposing its velocity vector. The internal pressure and the elastic hinge action of the crease lines (124) dissipate part of the energy through controlled deformation. Any residual energy transmitted beyond the inflated cell is absorbed by the underlying ballistic base sheet (112), which deforms slightly to spread the load over a wider area, thereby minimizing blunt trauma or structural indentation.

[0064] Multiple foldable cells (120) can be independently controlled and re-armed after deployment, providing multi -hit functionality. The cells may be re-pressurized from a shared reservoir, or spent squibs (132) can be replaced modularly. The combination of real-time sensing, predictive actuation, and mechanical transformation enables the system (100) to behave as an intelligent, adaptive armor — capable of anticipating an impact and dynamically configuring its stiffness and geometry before contact occurs.

[0065] Referring to Figures 2A and 2B, the predictive control and actuation system (200) constitutes the intelligent decision-making core of the projectile impact-mitigating protective system (100). It governs the continuous sensing, prediction, synchronization, and activation processes that enable real-time protective deployment. The system (200) coordinates multiple data inputs from radar, acoustic, and optical sensors, processes them through predictive algorithms, and delivers precisely timed electrical actuation signals to selected inflation assemblies (214). Through this closed-loop operation, the control architecture ensures that each targeted foldable cell (120) of the armor layer (110) is inflated milliseconds before impact, thereby functioning in a predictive rather than reactive manner.

[0066] The system (200) comprises a radar sensing module (202), a processing and control unit (204), a synchronization controller (206), and a feedback interface (208). These subsystems are linked through high-speed digital communication lines and low- impedance power conduits embedded within the armor structure. The radar sensing module (202) serves as the primary data-acqui sition unit and may include an array of compact transceiver elements arranged over the armor surface, helmet shell, or structural boundary. Each radar node emits electromagnetic waves in microwave or millimeter-wave frequency bands — typically between 2 GHz and 77 GHz — and measures the Doppler shift of reflected signals to determine the presence and velocity of incoming projectiles. By operating multiple frequencies simultaneously, the radar module (202) performs frequency -modulated continuous-wave (FMCW) ranging to resolve distance with centimeter-level precision and angular resolution finer than 1°.

[0067] To improve detection robustness, the radar module (202) employs adaptive digital beam-forming and signal-fusion techniques that dynamically steer sensing zones toward potential threats. The radar nodes communicate with one another through a phased-array network to achieve hemispherical or full 360-degree coverage, depending on configuration. High-speed analog-to-digital converters capture echo signals, while embedded digital signal processors execute clutter rejection, cross- correlation, and threshold detection algorithms to distinguish projectiles from environmental noise or moving background objects such as debris or raindrops. The module (202) thus delivers continuous real-time projectile data — comprising range, velocity, angle of approach, and trajectory vector — to the processing and control unit (204).

[0068] The processing and control unit (204) forms the computational hub of the system. It houses a high-speed processor (204a), such as a digital signal processor or field- programmable gate array (FPGA), and a memory (204b) containing program code, ballistic databases, and lookup tables. Incoming radar data are filtered and analyzed using predictive kinematic algorithms that estimate the proj ectile’ s predicted impact point (204c) and time-to-impact (204d) relative to the armor coordinate frame. The computation is executed within microseconds and is continuously updated as new sensor data arrive, enabling accurate prediction even for erratically moving projectiles. The control unit (204) also correlates radar data with auxiliary acoustic or optical sensor signals (146, 148) to confirm the threat type and reduce falsepositive activations.

[0069] Once the impact point (204c) and time-to-impact (204d) are determined, the control unit (204) references an internal spatial mapping of all protective cells (210) across the armor layer (110). It identifies the specific cell or cluster of cells directly aligned with the predicted impact region and transmits digital actuation signals (212) to those corresponding inflation assemblies (214). Each signal is a precisely timed electrical trigger designed to activate the associated micro-pyrotechnic squib (132) or valve (136). The timing, voltage, and pulse duration of these signals are calibrated based on environmental variables and gas-expansion characteristics stored within the control logic.

[0070] The synchronization controller (206) operates as a timing-management subsystem within the architecture, ensuring that each inflation event is aligned to the predicted impact moment. It calculates delay offsets by factoring in inflation-lag characteristics of each assembly (214), the type of propellant or gas used, ambient temperature, and pressure variations. The controller (206) can perform microsecond-scale adjustments to actuation sequences so that all selected cells (210) complete deployment at a uniform temporal reference point relative to the projectile’s arrival. In embodiments employing multiple radar or sensor arrays, the synchronization controller (206) also manages cross-module timing coherence to maintain accurate triangulation and consistent response intervals.

[0071] Gas for inflation is supplied by a shared gas source (216), which may include a compact cartridge, reservoir manifold, or distributed micro-tank system. The synchronization controller (206) regulates valves and squib ignition to maintain optimum pressure distribution during simultaneous activations, avoiding overpressurization or depletion. A built-in thermal and electrical safety circuit prevents inadvertent ignition in case of system malfunction or electromagnetic interference. The feedback interface (208) establishes a closed-loop monitoring network that enables self-diagnosis and adaptive correction. Each protective cell (210) or inflation assembly (214) may include miniature sensors — pressure, strain, or temperature transducers — that continuously report operational status after activation. The feedback interface (208) aggregates this data and forwards it to the processing unit (204), allowing dynamic recalibration of activation thresholds or gas-release parameters. For example, if the interface detects incomplete inflation, the system can immediately compensate by triggering adjacent cells (210) or adjusting future actuation timing to account for pressure-loss behavior. The feedback data also support long-term diagnostics, enabling the system to track component fatigue or propellant depletion across multiple deployments.

[0072] Power for the entire system (200) is supplied through distributed rechargeable micro-cells integrated within the armor layer or through a centralized energy module. Each sub-system includes voltage regulators and energy-storage capacitors to deliver the high-current bursts required for squib ignition. Redundant power lines ensure uninterrupted operation even if a portion of the circuit is damaged by impact. Optional energy-harvesting modules — such as piezoelectric patches embedded in the armor — can recharge the system from ambient motion or vibration when not in use, improving operational autonomy.

[0073] As illustrated in Figure 2B, the timing and logic diagram represent the sequence of events controlled by the system (200): continuous monitoring by radar module (202), predictive computation by control unit (204), generation of actuation signals (212), and timed activation by synchronization controller (206), all verified by feedback interface (208). The synchronization algorithm (158) governs this process, optimizing temporal coordination between sensing, computation, and mechanical inflation. By maintaining real-time data loops, the predictive control and actuation system (200) ensures that the protective system (100) can anticipate the impact event and initiate local inflation at the precise millisecond required for maximum energy mitigation.

[0074] In certain embodiments, the system (200) may further include wireless communication modules for telemetry, diagnostics, and software updates. These modules enable external monitoring, remote control, or integration with vehicle onboard sensors or soldier-worn electronics. The processor (204a) may store and transmit activation logs, pressure data, and performance metrics for each deployment, allowing post-event analysis or predictive maintenance scheduling. Collectively, the radar sensing module (202), processing unit (204), synchronization controller (206), feedback interface (208), and associated assemblies (214, 216) form a unified, high-speed control network that transforms raw sensor data into immediate mechanical response, making the protective system (100) capable of self-adaptive, intelligent, and repeatable impact mitigation under extreme conditions.

[0075] Referring to Figures 3A to 3C, the foldable impact-mitigating armor system (300) illustrates the mechanical sub-structure and energy-dissipation mechanism that converts gas expansion into controlled deformation for ballistic and blast protection. The system (300) is designed to provide localized stiffness enhancement, transient shock absorption, and structural adaptability under high- energy impacts such as bullets, shrapnel, or debris fragments.

[0076] As shown in Figure 3A, the armor system (300) comprises a ballistic base layer (302) forming the rearmost structural barrier relative to the direction of incoming threat. The base layer (302) is fabricated from woven aramid textiles, ultra-high- molecular-weight polyethylene (UHMWPE) laminates, ceramic-polymer hybrids, or metallic mesh composites that combine low areal density with high tensile strength. This layer acts as the final energy-absorbing substrate, dissipating residual kinetic energy transmitted through the active layer.

[0077] Mounted above the base layer (302) is a deployable panel (304) that carries an array of foldable cells (306) arranged in a continuous tessellated geometry defined by crease lines (308). The deployable panel (304) may be a single integrated sheet or a modular cluster of replaceable tiles. Each foldable cell (306) functions as an expandable volume that transitions from a collapsed configuration to an outwardly protruding geometry upon inflation. The cell walls may consist of laminated fiber- reinforced polymer composites, elastomer-coated ballistic fabrics, or thermoplastic polyurethane (TPU) membranes reinforced with aramid micro-fibers. The wall laminate typically comprises an inner flexible polymer film for airtight sealing, an intermediate aramid or UHMWPE layer for tensile reinforcement, and an outer elastomeric coating for durability. This multilayer construction allows the cell to withstand repeated folding cycles without delamination or fatigue cracking.

[0078] Gas inflation of each cell (306) is achieved through a network of gas inlets (310), micro-valves (312), and a gas manifold (314), as illustrated in Figures 3 A and 3B. The manifold (314) acts as the primary distribution conduit for compressed gas originating from onboard reservoirs or from integrated gas generators (316) embedded within the armor structure. The manifold may comprise flexible microchannels fabricated from silicone elastomer, metalized polymer tubing, or additive- manufactured conduits integrated directly into the panel (304). Each micro-valve (312) is electronically addressable and may use piezoelectric or solenoid actuation to control the flow rate and timing of gas delivery into its respective cell (306). When a deployment command is issued by the synchronization controller (206) of the predictive control system (200), gas from the manifold (314) is directed through the inlets (310) into the selected cells (306). Within a few milliseconds, internal pressure rises to approximately 1-3 bar, causing the cells to unfold along their crease lines (308). The pre-defined origami geometry guides the expansion so that the cell assumes a rigidized three-dimensional configuration — typically a dome, truncated pyramid, or prismatic shell — that projects outward from the armor surface. The internal gas pressure interacts with the elastic resistance of the hinge folds to create a self-locking structural state that endures the impact phase without collapsing.

[0079] During an impact event, the pressurized foldable cells (306) act as deformable cushions that intercept the projectile slightly before it contacts the ballistic base layer (302). The incoming kinetic energy is dissipated through three primary mechanisms:

[0080] (1) compression of the trapped gas within the cells, which behaves as a pneumatic spring;

[0081] (2) bending and shear deformation along the crease lines (308), which converts linear momentum into elastic strain energy; and

[0082] (3) lateral redistribution of load across adjacent cells through shared wall junctions and tethering features. This multi-mode energy conversion significantly reduces the peak force transmitted to the base layer (302) and thereby minimizes backface deformation or blunt-force trauma to the wearer or structure.

[0083] Figure 3B illustrates the internal configuration of the gas-distribution network in greater detail. The micro-valves (312) regulate the sequencing of inflation among the cells (306) to maintain structural stability and to prevent pressure drop across the manifold (314). Embedded gas generators or elastic reinforcements (316) may serve dual functions — providing initial gas impulse and strengthening the cell base against repetitive loading. The manifold channels are designed with low-flow resistance and may incorporate micro-check valves to prevent reverse leakage when a single cell is damaged. The system may include miniature temperature and pressure sensors located adjacent to each valve (312) to relay real-time conditions to the feedback interface (208). This information enables the controller (206) to fine-tune valve timing, balance pressure across zones, and perform adaptive inflation sequencing.

[0084] Figure 3C shows representative origami tessellation patterns applicable to the foldable cells (306) namely square grid, hexagonal, Miura-ori, and waterbomb base geometries. Each pattern provides unique mechanical advantages depending on use case. The square grid offers uniform expansion and straightforward manufacturability; the hexagonal pattern delivers isotropic load distribution and tight packing efficiency; the Miura-ori configuration yields high folding compactness and low actuation energy; and the waterbomb base geometry achieves spherical volumetric expansion ideal for omnidirectional energy dispersion. The tessellation choice can be customized across the armor surface, with denser cells in high-threat zones and lighter layouts in peripheral regions.

[0085] Post-impact, once energy absorption is complete, the inflated cells (306) may be vented through controlled openings in the micro-valves (312) or dedicated bleed ports to release internal gas. The inherent elastic recovery of the crease lines (308) assists in retracting the cells back into their original folded configuration, restoring flexibility to the panel (304). Each module can then be re-armed either by repressurization from the manifold (314) or by replacing spent gas generators (316). The modular design ensures that localized damage does not compromise adjacent cells, thereby preserving multi -hit capability.

[0086] In some embodiments, the foldable cells (306) may also contain embedded microsensors such as but not limited to strain gauges, piezoelectric patches, or micropressure transducers that continuously monitor internal stress, temperature, or fatigue during and after deployment. These sensors are linked to the feedback interface (208) of the control system (200), enabling automatic health diagnostics and readiness assessment. Maintenance personnel can retrieve performance data and replace only those modules that exceed fatigue or pressure thresholds.

[0087] Overall, the armor system (300) combines lightweight composite fabrication, origami-based deployable geometry, and controlled pneumatic activation to achieve a mechanically adaptive protective surface. The synergy between the base layer (302), deployable panel (304), and gas-distribution network (314) transforms the system from a flexible textile in standby mode into a rigid, energy-dissipating shield within milliseconds of threat detection. The structure’s scalability and reusability make it suitable for integration into wearable body armor, helmets, vehicle hulls, aerospace panels, and stationary security barriers.

[0088] Referring to Figure 4A, the operational method (400) illustrates the sequential process implemented by the projectile impact-mitigating protective system (100) for real-time detection, prediction, and neutralization of high-speed projectiles. The method (400) is executed through coordinated operation of the predictive control and actuation system (200), the deployable armor system (300), and the flexible armor layer (110). The sequence enables the system (100) to function predictively, inflating selected foldable cells (120, 306) milliseconds before the projectile makes contact, thereby converting the structure into a rigidized energy-absorbing barrier. The process begins with a monitoring and detection phase, wherein the radar sensing module (202) continuously scans the environment surrounding the protected surface. The radar module emits electromagnetic signals within the microwave or millimeter-wave range, typically between 24 GHz and 77 GHz, and measures Doppler and frequency-modulated continuous-wave (FMCW) reflections to identify moving projectiles. The sensed parameters include projectile velocity, range, angle of approach, and trajectory vector. Data from the radar module (202) are corroborated by auxiliary acoustic sensors (146) detecting sonic signatures and optical or infrared sensors (148) detecting thermal and visual traces. The fused sensor data provide a high-confidence target confirmation and are transmitted to the processing and control unit (204) through the control circuit (150).

[0089] In the prediction and computation phase, the processor (204a) of the control unit (204) executes a predictive algorithm stored in memory (204b) to calculate the predicted impact point (204c) and time-to-impact (204d) of the incoming projectile relative to the coordinate frame of the armor layer (110). The algorithm employs kinematic modeling, trajectory extrapolation, and real-time data filtering (for example, Kalman-based estimation) to determine the impact location with submillimeter accuracy and temporal precision within microseconds. The processor continuously updates these predictions as new sensor information is received, ensuring responsiveness even against irregularly moving threats. Once the predicted impact zone is established, the control logic maps it to the corresponding foldable cell or cluster of cells (120, 306) on the armor layer.

[0090] In the activation and synchronization phase, the control unit (204) transmits electrical actuation signals (212) to the associated inflation assemblies (214) through the synchronization controller (206). The controller (206) determines timing offsets by compensating for inflation lag, gas pressure characteristics, ambient temperature, and latency in the ignition circuits. Each actuation signal triggers either a micro-pyrotechnic squib (132) or a pressurized-gas valve (136) linked to the shared gas source (216). The synchronization controller (206) ensures that inflation of the target cells (120, 306) reaches full expansion at the precise instant of projectile contact. This timing precision allows the system (100) to act predictively rather than reactively.

[0091] In the inflation and deployment phase, gas from the source (216) is released through inlets (310) and micro-valves (312) into the internal cavities of the selected foldable cells (120, 306). The gas inflates the cells to a pressure of approximately 1.5 to 3 bar, causing them to unfold along their crease lines (124, 308) into dome- or pyramid-shaped three-dimensional forms. The inflation process is completed within 1 to 3 milliseconds, producing a rigidized protrusion extending outward from the armor surface (110). The inflation pressure and geometric expansion of the cell generate an outward-directed counter-momentum that prepares the structure to intercept the approaching projectile.

[0092] Upon completion of inflation, the counteraction and energy -absorption phase begins. The expanded foldable cell (120, 306) encounters the projectile before it reaches the ballistic base sheet (112, 302). The internal gas compression within the cell dissipates part of the kinetic energy, while deformation along the crease lines (124, 308) converts linear momentum into elastic strain energy. Lateral stress redistribution occurs through the tessellated cell network, reducing localized impact force. Residual energy that penetrates the inflated layer is absorbed by the ballistic base layer (112, 302), which flexes slightly to disperse the remaining impulse across a broader area. The combined pneumatic, elastic, and ballistic actions significantly reduce back-face deformation and transmitted shock to the wearer or structure. Empirical simulations indicate that this dual-stage mechanism can reduce effective impact impulse by more than 60 percent compared with equivalent-weight passive armor.

[0093] Following energy absorption, the method proceeds to a venting and recovery phase. The inflated cells (120, 306) are deflated through the micro-valves (312) or dedicated bleed ports, releasing internal gas to return the cells to their original folded configuration. The inherent elastic memory of the crease lines (124, 308) assists in the refolding process. In embodiments using reusable pneumatic inflation, the gas manifold (314) replenishes the system from the shared reservoir (216); in pyrotechnic versions, expended cartridges (132) are replaced modularly. During recovery, embedded pressure and strain sensors within the cells relay performance data to the feedback interface (208). The feedback interface aggregates inflation duration, maximum pressure, and deformation metrics and communicates them to the processing unit (204) for self-diagnosis and calibration of subsequent activation cycles. If any anomaly — such as incomplete inflation or pressure loss — is detected, the control unit recalibrates actuation parameters or reassigns adjacent cells for continued coverage.

[0094] The method (400) thereby defines a closed-loop operational cycle comprising six primary stages: continuous monitoring, predictive computation, activation, inflation, counteraction, and recovery. The total cycle is executed within a duration shorter than the projectile’s travel time to the target — typically less than 5 milliseconds. Because each stage is governed by the synchronization algorithm (158), the protective system (100) functions in a predictive mode, activating only localized cells within the anticipated impact zone. This localized actuation minimizes energy consumption, weight, and thermal buildup while maintaining overall flexibility and readiness for subsequent engagements.

[0095] The method (400) is scalable across various embodiments of the protective system (100). For wearable armor, smaller foldable cells (120) provide finer resolution and ergonomic flexibility; for vehicular or structural applications, larger modules (306) deliver greater energy capacity and coverage. The same operational logic applies regardless of geometry or size. After each deployment, diagnostic data may be stored in non-volatile memory or transmitted via wireless telemetry modules for maintenance evaluation, ensuring that the system remains operationally ready for repeated use. The method (400) thus converts the passive armor surface into an intelligent, predictive defense mechanism capable of sensing, analyzing, and neutralizing ballistic threats before physical impact occurs. The foregoing descriptions of exemplary embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the disclosure to the precise forms disclosed, and obviously many modifications and variations are possible in the light of the above teachings. The exemplary embodiments were chosen and described in order to best explain the principles of the disclosure and its practical application, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated.

Claims

We claim1. A projectile impact mitigating protective system (100) comprising: a flexible armor layer (110) wearable on a human or mountable on a structure, the armor layer including a base sheet (112) of ballistic-resistant material; a plurality of origami-tessellated foldable cells (120) distributed across the armor layer (110), each foldable cell (120) formed from a fold-patterned material section (122) having crease lines (124) defining a compact collapsed state and an expandable three-dimensional state, the geometry of the crease pattern enabling volumetric expansion of individual cells substantially independent of adjacent cells; an inflation assembly (130) associated with each foldable cell (120), each inflation assembly (130) including a micro-pyrotechnic squib (132) or a controllable pressurized gas valve (136) that, upon electrical activation, generates or releases gas to inflate the corresponding foldable cell (120) within a millisecond time interval; a multi -frequency radar sensing unit (144) forming part of a sensor system (140), the radar sensing unit (144) being adapted to detect an incoming high-speed projectile, determine its velocity vector and approach trajectory, and transmit realtime data to a control circuit; an electronic control circuit (150) that continuously receives the radar data, computes a predicted impact point (156) and time-to-impact (154) on the armor layer (110), and selectively triggers one or more inflation assemblies (130) corresponding to the foldable cell or cells (120) covering the predicted impact point prior to projectile contact; and a synchronization algorithm (158) implemented within the control circuit (150) for timing activation of the inflation assemblies (130) such that each selected foldable cell (120) reaches its fully expanded state substantially at the moment of projectile arrival, wherein the localized and predictive expansion of the selected foldable cell (120) generates a forward-directed counterforce that partially decelerates or deflects the projectile before it reaches the base sheet (112), thereby reducing transmittedimpact energy and permitting multi-hit operation through independent actuation of remaining cells.

2. The system (100) as claimed in Claim 1, wherein the foldable cells (120) are arranged in an origami tessellation pattern formed in a continuous sheet of material such that each foldable cell (120) can expand independently of adjacent cells (120) when actuated.

3. The system (100) as claimed in Claim 2, wherein the foldable cells (120) are made from high-strength aramid fiber fabric or ultra-high-molecular-weight polyethylene (UHMWPE) fiber fabric that is flexible in the collapsed state and impact-resistant in the expanded state.

4. The system (100) as claimed in Claim 3, wherein each inflation assembly (130) comprises a pyrotechnic gas-generation squib (132) aligned with the respective foldable cell (120), the squib containing a gas-generating compound that, when electrically ignited by the control circuit (150), produces gas to inflate the cell within a few milliseconds.

5. The system (100) as claimed in Claim 4, wherein each inflation assembly (130) includes a pressurized gas canister (134) and electronically controllable valve (136) adapted to release compressed gas into the foldable cell (120), the canister being rechargeable or capable of multiple actuations.

6. The system (100) as claimed in Claim 5, wherein each foldable cell (120) further includes tethering members or reinforcement bands (138) constraining expansion to a predetermined shape and volume to distribute stress and prevent rupture during inflation and impact.

7. The system (100) as claimed in Claim 6, wherein the sensor system (140) includes a Doppler radar unit (144) capable of discriminating true ballistic projectiles from false objects using multi -frequency signal processing, and optionally includes an acoustic or optical sensor (146) to corroborate projectile detection.

8. The system (100) as claimed in Claim 7, wherein the electronic control circuit (150) comprises a high-speed processor (152) operable to calculate time-to- impact (154) and predicted impact location (156) in real time and to trigger therelevant inflation assembly (130) at a lead time such that the selected foldable cell (120) is fully expanded substantially at the moment of projectile contact.

9. The system (100) as claimed in Claim 8, wherein the base sheet (112) is positioned behind the foldable cells (120) relative to the threat direction, providing secondary protection against any residual projectile energy.

10. The system (100) as claimed in Claim 9, wherein the protective system (100) forms part of a helmet or headgear (160) equipped with the sensor system (140) to provide 360-degree detection coverage, the helmet containing foldable cells (120) and inflation assemblies (130) embedded in its shell to deploy outward in response to a detected threat.

11. The system (100) as claimed in Claim 10, wherein the protective system (100) is implemented as a wearable vest or jacket (162) covering a torso region, the foldable cells (120) being distributed across front and / or back panels and the radar sensing unit (144) oriented to monitor a forward field of view.

12. The system (100) as claimed in Claim 11, wherein the protective system (100) is mounted on avehicle or fixed structure (164), the sensor system (140) being adapted to detect incoming projectiles approaching the structure and to activate the corresponding foldable cells (120) prior to impact.

13. The system (100) as claimed in Claim 12, wherein the tessellation geometry of the foldable cells (120) is selected from a square grid, hexagonal, Miura-ori, or waterbomb base pattern permitting planar rest and volumetric deployment under threat.

14. The system (100) as claimed in Claim 13, wherein the control circuit (150) performs multi-hit management, selectively triggering different inflation assemblies (130) when multiple incoming projectiles are detected on distinct trajectories.

15. The system (100) as claimed in Claim 14, wherein the foldable cells (120) in the collapsed configuration collectively form a continuous protective surface providing stab and minor-impact resistance, and wherein, upon detection of a sharp local impact, the control circuit (150) activates local inflation even in absence of ballistic trajectory detection.

16. A predictive control and actuation system (200) for operating a projectileimpact mitigating protective system (100) having multiple inflatable protective cells (120), the system (200) comprising: a radar sensing module (202) operable at multiple frequencies to detect an incoming projectile, determine its velocity, distance, and approach trajectory, and generate real-time projectile data; a processing and control unit (204) comprising a processor (204a) and memory (204b) that perform: continuous acquisition of projectile data from the radar sensing module (202); computation of a predicted impact point (204c) and time-to-impact (204d) with respect to a protective surface (110); identification of one or more protective cells (210) located at or near the predicted impact point; and generation of actuation signals (212) for initiating inflation of inflation assemblies (214) associated with the identified protective cells (210); a synchronization controller (206) electrically connected to the inflation assemblies (214) and operable to control the activation timing of each inflation assembly such that the respective protective cell (210) attains a fully expanded state substantially at the instant of projectile arrival at the predicted impact point (204c); and a feedback interface (208) adapted to receive operational data from sensors disposed in the protective cells (210), the operational data including pressure, expansion duration, or deformation measurements, and to adjust subsequent activation timing or inflation parameters based on the received data; wherein the synchronization controller (206) modifies activation timing in response to variations in projectile velocity or distance to achieve predictive and localized impact mitigation.

17. The system (200) as claimed in Claim 16, wherein the radar sensing module (202) is operable over a frequency range between 2 GHz and 40 GHz, and optionally combined with an acoustic or optical sensor to improve projectile identification accuracy.

18. The system (200) as claimed in Claim 17, wherein the processing and control unit (204) determines both the projectile’s approach vector and kinetic energy, and uses this information to adjust inflation pressure and deployment timing.

19. The system (200) as claimed in Claim 18, wherein the synchronization controller (206) executes timing adjustments within microsecond precision to ensure the selected protective cell (210) attains full expansion substantially at projectile contact.

20. The system (200) as claimed in Claim 19, wherein the feedback interface (208) receives pressure and deformation data to recalibrate subsequent activations, thereby improving accuracy of later inflation events.

21. The system (200) as claimed in Claim 20, wherein the processing and control unit (204) manages sequential or simultaneous activation of multiple inflation assemblies (214) to counter multiple projectiles detected on different trajectories.

22. A foldable impact-mitigating armor assembly (300) comprising: a base layer (302) made of ballistic-resistant material for absorbing residual impact energy; a deployable panel (304) disposed above the base layer (302), the deployable panel including a plurality of foldable cells (306) formed from a flexible sheet having crease lines (308) defining a tessellation pattern that permits each foldable cell (306) to lie substantially flat in a collapsed condition and to expand outward into a three-dimensional configuration when actuated; and a plurality of gas inlets (310) operable to introduce pressurized gas into selected foldable cells (306) to expand them locally upon activation;wherein the tessellation pattern is selected from a square grid, hexagonal, Miura- ori, or waterbomb base configuration that enables adjacent foldable cells (306) to expand substantially independently of one another; and wherein expansion of at least one foldable cell (306) produces localized stiffening and energy dissipation that reduces the impact force transmitted to the base layer (302).

23. The assembly (300) as claimed in Claim 22, wherein the foldable cells (306) are constructed from laminated composite sheets of aramid fiber and UHMWPE film bonded along the crease lines (308) to improve flexibility and strength.

24. The assembly (300) as claimed in Claim 23, wherein the tessellation pattern comprises a dual-layer Miura-ori configuration providing sequential expansion stages for enhanced energy absorption.

25. The assembly (300) as claimed in Claim 24, wherein each gas inlet (310) includes a micro-valve (312) connected to a gas manifold (314) that distributes pressurized gas selectively to target foldable cells (306).

26. The assembly (300) as claimed in Claim 25, wherein the foldable cells (306) are pre-tensioned or include elastic crease reinforcements (316) to control folding geometry and return behavior after deployment.

27. A method (400) for mitigating the impact of a high-speed projectile using a projectile-impact mitigating protective system (100) having multiple inflatable foldable cells (120), the method (400) comprising the steps of:(a) monitoring a surrounding area of a protected body or structure using a sensor system (200) including a radar sensing module (202) operating at multiple frequencies to detect an incoming projectile and determine its velocity, distance, and trajectory in real time;(b) processing the projectile data in an electronic control unit (204) to determine a predicted impact location (204c) and a time-to-impact (204d) on a flexible armor surface (110) incorporating a plurality of inflatable foldable cells (120);(c) activating, prior to the projectile’s arrival, an inflation assembly (214) corresponding to at least one of the foldable cells (120) covering the predicted impact location, the activation initiating inflation of the selected foldable cell (120);(d) inflating the selected foldable cell (120) from a substantially flat, collapsed configuration into an expanded three-dimensional configuration by releasing gas from a gas source (216), such that the cell projects outward from the armor surface (110);(e) positioning the expanded foldable cell (120) in the path of the incoming projectile such that the expansion of the cell exerts a counteracting force against the projectile’s motion, thereby partially decelerating or deflecting the projectile before it reaches the armor surface (110); and(f) absorbing residual projectile energy in an underlying ballistic layer (112) positioned behind the foldable cells (120), the ballistic layer halting or dissipating the remaining impact energy and preventing penetration to the protected body or structure; wherein the sequence of monitoring, processing, activation, and inflation is executed within a time interval shorter than the projectile’s time-to-impact, such that the selected foldable cell (120) reaches its fully expanded configuration substantially at the moment of projectile contact to achieve predictive and localized impact mitigation.

28. The method (400) as claimed in Claim 27, wherein the radar sensing module (202) operates concurrently with at least one acoustic or optical sensor to verify projectile detection.

29. The method (400) as claimed in Claim 28, wherein activation of the inflation assembly (214) occurs within five milliseconds prior to predicted impact, ensuring pre-impact expansion of the foldable cell (120).

30. The method (400) as claimed in Claim 29, wherein the inflation step includes releasing gas from a micro-pyrotechnic squib (132) or from a pressurized gas source (216) through a controllable valve.

31. The method (400) as claimed in Claim 30, wherein the inflating and absorbing steps are repeated sequentially or simultaneously for multiple incoming projectiles detected along different trajectories.

32. The method (400) as claimed in Claim 31, wherein, after absorption of the projectile’s energy, the inflated foldable cell (120) is vented or deflated and the system (100) is reset for subsequent activations.

33. The method (400) as claimed in Claim 32, wherein the protected body is a human wearer, the flexible armor (110) being integrated into a wearable garment, and the method (400) is carried out autonomously without manual intervention to provide real-time ballistic protection.

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