51 results about "Elastic systems" patented technology

This invention discloses a servo-elastic stabilization method based on multi-sensor information fusion, belonging to the field of flight control. Specifically, it involves: extracting and modeling the main load-bearing structure of the aircraft; calculating the modal frequencies, mode shapes, and mode shape slopes of the aircraft under unconstrained conditions; then combining the aircraft, a first sensor, servo motors, and the control system to form a closed-loop servo-elastic system; calculating the open-loop system transfer function from the control input to the feedback input of the control system, drawing an open-loop Bode plot, and determining the dangerous frequencies and corresponding dangerous natural modes; based on this, placing a second angular velocity sensor on the aircraft; then calculating and correcting the weighting coefficients of the two angular velocity sensor signals, and introducing the weighted signal into the control system instead of the original signal; comparing the system characteristics to ensure the servo-elastic stability of the aircraft without affecting the rigid body phase and amplitude.

A trampoline includes an elastic assembly, wherein a portion of the elastic assembly is a bendable energy accumulator; and an elastic support including vertical supporting units and a horizontal supporting unit, two vertical supporting units are arranged at intervals on the horizontal supporting unit, the two vertical supporting units are respectively connected with the first end and the second end to bilaterally support and pre-tension the elastic assembly, and the elastic assembly, when being subjected to a bending deformation, is capable of making at least one of the vertical supporting units and the horizontal supporting unit to be subjected to an elastic bending deformation, so as to apply symmetrical elastic reset force to the first end and the second end, and limit a change of a horizontal distance between the first end and the second end.

The invention discloses a non-Hermite elastic system and application thereof. The system comprises a first resonator, a second resonator and a coupling module. The coupling module is composed of a sensing-actuating feedback system and comprises a first sensor and a first actuator which are arranged on a first resonator, and a second sensor and a second actuator which are arranged on a second resonator. And the sensors are used for detecting the deformation of the corresponding resonators. The actuators are used for driving the corresponding resonators to deform. Excitation signals of the first actuator and the second actuator are obtained by multiplying sensing signals of the first sensor and the second sensor by a transfer function. The transfer function makes the two natural frequencies of the non-Hermi elastic system tend to be consistent near a singular point. The bifurcation value of the inherent frequency of the system near the singular point is very sensitive to the parameter change of the system, so that the cantilever beam mass measurement device and the crack propagation detection device with ultrahigh sensitivity can be obtained.

The invention provides a combined rigidity-adjustable liquid elastic vibration isolator and a rigidity adjusting method thereof, and relates to the technical field of liquid elastic vibration isolators. Required elastic rigidity is provided through a composite elastic system formed by combining rubber and an air spring; an electronic controller (ECU controller) is used for collecting and processing signals from an inner cylinder displacement sensor, an outer cylinder displacement sensor and a pressure sensor, the signals are compared and analyzed with preset target displacement difference signals of the inner cylinder and the outer cylinder, and then the duty ratio of output pulse width modulation signals is dynamically adjusted based on the comparison result. The opening and closing of an electromagnetic valve in the air spring assembly are controlled, so that the rigidity of the air spring is adjusted, and rigidity reduction caused by aging of a rubber material is compensated. According to the control scheme, the stability of the vibration isolation frequency of the liquid elastic vibration isolator is effectively maintained, and the performance reliability of the vibration isolation system in the long-term operation process is ensured.

The novel self-resetting vibration reduction and isolation device comprises a piezoelectric upper cover, an inerter system is arranged at the lower end of the piezoelectric upper cover, a second permanent magnet is arranged at the lower end of the inerter system, and the piezoelectric upper cover is connected with the second permanent magnet through an elastic system; vibration of a building caused by different external acting forces can be flexibly dealt with through multi-stage energy consumption, the energy consumption effect is remarkable, the piezoelectric upper cover forms first-stage energy consumption, the inerter system and the elastic system form second-stage energy consumption, and the inerter system and the second permanent magnet form third-stage energy consumption; and meanwhile, the self-resetting vibration reduction and isolation device is cooperated and automatically reset through the elastic system and the acting force between the inerter system and the second permanent magnet, and the utilization rate of the vibration reduction and isolation device is increased.

The invention provides a method and device for determining the pre-pressing amount of an elastic system, the elastic system and a suspension assembly, the elastic system comprises one or more elastic elements, and the method comprises the steps that the pre-loading force of each elastic element in the one or more elastic elements is determined; based on the preloading force of each elastic element, the prepressing amount of each elastic element is determined; wherein the preloading force and / or the prepressing amount enable an assembly connected to the one or more elastic elements to be in a static balance state, and the total prepressing amount, corresponding to the preloading force, of the one or more elastic elements is minimum. According to the method for determining the preloading amount of the elastic system, the accuracy of the preloading force is remarkably improved, meanwhile, the calculation process of the preloading force of the elastic system is simplified, and the skill threshold of operators is reduced.

The invention relates to the field of aeroelastic mechanical analysis, in particular to an aircraft rigid-elastic coupling aeroelastic stability and dynamic response analysis method which comprises the following steps: determining inherent shape parameters of an aircraft, and dividing a mid-camber surface of an aircraft wing into a plurality of quadrilateral aerodynamic grids along a chordwise direction and a spanwise direction; based on the pneumatic grid, establishing a vortex grid method state-space equation; establishing an aircraft wing, establishing a flight dynamics model and a finite element structure model, and further establishing a rigid-elastic coupling dynamics equation; a three-dimensional spline interpolation method is utilized to obtain a rigid body motion-structure-pneumatic coupling relation, and a generalized external force and rigid-elastic coupling aeroelastic system state space equation is determined based on the rigid body motion-structure-pneumatic coupling relation and the rigid-elastic coupling kinetic equation; determining analysis results of elastic stability and dynamic response according to the state-space equation; according to the method, efficient and accurate rigid-elastic coupling calculation analysis can be realized.

The invention discloses a trampoline and elastic system. The trampoline structure is novel and reasonable, the two ends of the elastic member are supported by vertical support units, and the elastic member and the elastic support both have elastic energy storage characteristics. The invention makes full use of the bending elastic energy storage characteristics of the elastic member and the excellent elastic energy storage characteristics of the elastic support, which not only significantly improves the elastic performance of the trampoline as a whole, increases the lift range of the elastic member, eliminates the friction noise generated when the elastic member rises and falls, but also eliminates the adverse effects on the support caused by the bending of the elastic plate, the turning angle of the two ends of the supported elastic plate, and the change of the horizontal distance between the two ends of the supported elastic plate. The human body or other objects can make vertical up-and-down movement in the middle of the elastic member by using the elastic deformation of the elastic member and the elastic support, which is beneficial to the physical training, fitness, entertainment and rehabilitation of people of different ages. The elastic system has all the characteristics of the above-mentioned trampoline and will not be described here.

A body of a vehicle can include a front structure including a front wheel of the vehicle; a rear structure including a rear wheel of the vehicle; a rotation shaft connecting the front structure and the rear structure and allowing the front structure and the rear structure to rotate relative to each other; and an elastic system providing a return force in the opposite direction of the relative rotation in response that the front structure and the rear structure rotate relative to each other is disclosed.

An anti-glare system can include a material cover comprising at least one slot. An anti-glare system can include an attachment mechanism configured to attach the material cover to a scope, wherein the material cover is less than 3 mm thick. The anti-glare system can further include a strap or elastic system to connect to a scope.

This invention discloses a centering support and a sound-generating device. The centering support is applied to the sound-generating device and has a major axis side and a minor axis side. The ratio of the length of the major axis side to the length of the minor axis side is greater than or equal to 1.5. The centering support has at least two mounting holes, which are spaced apart and penetrate the centering support. The mounting holes are used for the voice coil of the sound-generating device to pass through and be fixed. This invention aims to provide a centering support that can ensure the axial synchronous movement of two voice coils and improve sound quality. When applied to a sound-generating device, this centering support ensures the axial synchronous movement of two voice coils, reducing nonlinear distortion caused by the asynchrony of the two voice coils during operation. Simultaneously, while satisfying the damping characteristics of an elastic system, the centering support also ensures the stiffness and strength of the centering support during vertical movement, making the product practical.

A vehicle body of a vehicle includes: a front structure of the vehicle body including a front wheel of the vehicle; a rear structure of the vehicle body including rear wheels of the vehicle; a rotating shaft connecting the front structure and the rear structure and configured to enable the front structure and the rear structure to rotate relative to each other; and an elastic system configured to provide a restoring force in a direction opposite to a relative rotation direction in response to relative rotation of the front structure and the rear structure with respect to each other.

The invention discloses a plastic sealing strip with multiple locking functions, which comprises a lock body assembly and a lock cylinder, the lock cylinder is a plastic lock cylinder and is separated from the lock body assembly, the lock body assembly comprises a lock body and a lock rod, a lock cylinder cavity is arranged on the lock body close to the lock rod, the plastic lock cylinder is arranged in the lock cylinder cavity, and the lock cylinder is arranged in the lock cylinder cavity. A plurality of layers of lock tooth pieces are arranged in the plastic lock cylinder, each layer of lock tooth piece comprises a plurality of elastic arms, lock teeth are arranged on the elastic arms, and a plurality of locking grooves are formed in the lock rod. The locking teeth on the elastic arm are clamped with the locking grooves in the locking rod in a locking state; the elastic arms are distributed in the circumferential direction of the lock hole shaft and apply radial locking force to the lock teeth. According to the plastic sealing strip with the multiple locking functions, the problems of safety and recycling compatibility are solved through a split lock cylinder structure and a radial elastic system, and each lock tooth is provided with an elastic arm to provide radial locking force, so that the locking capacity is greatly improved, and the cost is reduced.

Filtering pulley (1) comprising a hub (2) suitable for being fixed to a shaft rotating around an axis (A), a crown (3) and a closing element (11) associated with the crown (3) and definining with it a space (15), the crown (3) and the closing element (11) being mounted coaxially and rotationally free on the hub (2), at least one elastic system (25) arranged circumferentially with respect to the hub (2) and to the crown (3) and interposed between a pair of first elements (26) integral with the hub (2) and between a pair of second elements (16) integral with at least one of the crown (3) and the closing element (11), wherein the closing element (11) is supported by the hub (2), the crown (3) being rigidly carried by the closing element (11).

The invention discloses a rail transit steel rail damper capable of restraining multi-order frequency, and belongs to the technical field of rail transit vibration and noise reduction, the rail transit steel rail damper comprises two constraint damping assemblies and a resonance damping assembly, each constraint damping assembly comprises a constraint plate and an elastic damping layer attached to the rail web of a steel rail, the constraint plate is embedded in the top of the elastic damping layer, and the resonance damping assembly is embedded in the elastic damping layer. The inner side of the elastic damping layer is of an arc-shaped structure matched with the rail web of the steel rail, and the resonance damping assembly comprises a mass plate, a first elastic layer, a middle plate, a second elastic layer and an upper cover plate which are sequentially connected from bottom to top. By restraining the damping assembly, the shearing area of the damping layer parallel to the longitudinal section of the steel rail is increased, the shearing effect of the damping layer is enhanced through overall vertical deformation of the steel rail, the vibration and noise reduction effect is further improved, and different elastic systems are formed through the mass plate, the first elastic layer, the middle plate, the second elastic layer and the upper cover plate; tuning with different frequencies of the steel rail can be realized, and vibration is inhibited.

Disc brake, with: a fastening component (2, 51) which is designed to be fixed to a non-rotating section of a vehicle and which is designed to extend over an outer circumferential side of a disk (1), a saddle (5) which is arranged on the fastening component (2, 51) such that it is movable in an axial direction of the disk (1), a pair of brake pads (6) which are movably provided on the mounting component (2, 51) and are designed to be pressed against both surfaces of the disc (1) by the caliper (5), a lining spring (11, 31, 61) which is provided on the fastening component (2, 51) and is arranged between the fastening component (2, 51) and the pair of brake linings (6), and a return spring (21, 41) which is arranged between the brake pad (6) and the fastening component (2, 51) and is designed to tension the brake pad (6) in a return direction to separate the brake pad (6) from the disc (1), and wherein the return spring (21, 41) has a proximal end section (22) and a distal end section (25), and the return spring (21, 41) is arranged such that the proximal end section (22) is fixed to a back plate (7) of the brake pad (6) and the distal end section (25) is in elastic contact with the side of the fastening component (2, 51) on an outer side in the disc radial direction relative to the proximal end section (22), characterized in that the lining spring (11, 31, 61) has a guide section (18, 32) which extends in the axial direction of the disk in a direction away from the disk (1) and, as it moves further away from the disk (1), is bent inwards in the disk radial direction, and wherein a part of the guide section (18, 32) is provided on a central side of the brake pad (6) in the disc circumferential direction at the intermediate section of the return spring (21, 41).

The present invention discloses a resonance suppression method and storage medium for a dual-inertia transmission system, and belongs to the field of motor control. The method comprises: constructing a model of a dual-inertia elastic system; observing the shaft torque of a transmission shaft in the dual-inertia elastic system by using a fractional-order disturbance observer, and making corresponding compensation for the electromagnetic torque according to the observed shaft torque of the transmission shaft. The observation equation of the fractional-order disturbance observer is: , where is the observer bandwidth, is the order of the fractional-order low-pass filter, is the inertia of the servo motor, is the speed of the servo motor, is the electromagnetic torque, and is the shaft torque disturbance observation value; the transfer function of the fractional-order low-pass filter is: , where is the transfer function of the fractional-order low-pass filter; observing the load torque and speed difference in the dual-inertia elastic system by using a state observer, and performing positive feedback compensation for the quadrature axis current according to the observed load torque and speed difference. The method of the present invention can not only suppress resonance well, but also has a strong anti-interference ability.

The present application relates to cutting system, taro round forming machine and its forming method, relate to cutting equipment technical field, including feeding system, cutting feed system, cutting device, rack, conveying system, several powder spraying systems and anti-sticking knife elastic system, the feeding system is installed on the cutting feed system, the end of the cutting feed system is provided with cutting feed hole, the cutting device is located at the end of the cutting feed system, and the blade of the cutting device is attached to the cutting feed hole, the conveying system is located below the cutting device, the powder spraying system is located above the conveying system, the anti-sticking knife elastic system includes elastic plate, multiple suction cups and air cylinder, the elastic plate is bent, the elastic plate is located at the back side of the blade of the cutting device towards the cutting feed hole, the elastic plate is swingly installed on the blade, multiple suction cups are installed on the elastic plate, a gas pipe joint is arranged on the suction cup, the air cylinder is installed on the blade, the piston rod of the air cylinder is connected with the elastic plate, and the particle integrity and production continuity are guaranteed.

The present invention relates to the field of aeroelastic mechanics analysis, and in particular to a method for analyzing the aeroelastic stability and dynamic response of a rigid-elastic coupling of an aircraft. The method comprises the following steps: determining the inherent shape parameters of the aircraft, dividing the mid-camber surface of the aircraft wing into a plurality of quadrilateral aerodynamic grids along the chord direction and the span direction; establishing a vortex grid method state-space equation based on the aerodynamic grid; establishing a flight dynamics model and a finite element structural model of the aircraft wing, and then establishing a rigid-elastic coupling dynamic equation; utilizing a three-dimensional spline interpolation method to obtain a rigid body motion-structure-aerodynamic coupling relationship, and determining the state-space equation of a generalized external force and a rigid-elastic coupling aeroelastic system based on the rigid body motion-structure-aerodynamic coupling relationship and the rigid-elastic coupling dynamic equation; and determining analysis results of elastic stability and dynamic response from the state-space equation. The present invention can realize efficient and accurate rigid-elastic coupling calculation and analysis.

The utility model provides a control device for improving fiber winding tension stability, and belongs to the technical field of fiber winding. The problems that in the winding process of an existing composite material, large tension abrades fibers, yarn breakage is caused, and precision control over tension stability and external interference are caused are solved. The yarn spreading device comprises a base, a workbench, a supporting frame, a yarn spreading roller, a secondary magnetic powder tension mechanism and a curved bar elastic system, the supporting frame is installed on the base, the workbench is connected with the supporting frame, a connecting base is installed at the top of the supporting frame, the curved bar elastic system is installed on one side of the connecting base, and the yarn spreading roller is installed on the other side of the connecting base. A tension sensor is installed on the side, close to the second-stage magnetic powder tension mechanism, of the workbench. The device is mainly used for improving the fiber winding tension stability.

The present application relates to a kind of self-controlled one-way friction damper, including frame, the distance between upper wall and lower wall in the frame is from small to big, elastic system and friction system are arranged in the frame, the elastic system passes through friction system, and two ends are respectively contacted with the upper wall and the lower wall of frame, and the friction system is partially located outside the frame;With the increase of building displacement, the elastic potential energy of elastic system itself increases, the force between elastic system and frame increases, the energy consumption of friction increases, and the energy consumption of damper will increase with the increase of building displacement, in the process of building reset, the elastic potential energy of elastic system gradually decreases, the force between elastic system and frame gradually decreases, and the energy consumption of damper gradually decreases, without affecting the complete reset of building, without making building produce residual deformation or fatigue, can prolong the service life of building.

The invention discloses an automatic starting and stopping method of a hearing aid. The automatic starting and stopping method comprises an elastic system, a storage system, a telescopic system, a control system, a hearing aid system and using steps. The elastic system comprises a wearing support, an elastic assembly and a shell. The storage system comprises a groove body assembly, a battery assembly and a limiting assembly. The telescopic system comprises a driving assembly and a telescopic assembly; the control system comprises a controller, a button assembly, a pressure sensor and a temperature sensor; the hearing aid system comprises a magnetic part, a conduction part and a conduction piece, whether the hearing aid system abuts against the surface of the human body or not is detected through a pressure sensor and a temperature sensor, when the hearing aid is worn, the pressure sensor and the temperature sensor can transmit signals to a controller, and the controller controls the hearing aid to be automatically started. When the hearing aid is taken down, the pressure sensor and the temperature sensor release signal output, the controller controls the hearing aid to be automatically turned off, and the button assembly can be manually operated to assist the operation of the equipment.

Microelectronic device of piezoelectric type, wherein a first and a second actuation unit are coupled between a fixed structure and a tiltable structure, on a first side of a rotation axis to control the rotation of the tiltable structure around the first rotation axis. Each actuation unit is formed by a first actuator, a second actuator and an elastic system. Each elastic system mutually couples the free ends of the respective first and second actuators to the tiltable structure.

The invention provides a parallel steel strand stay cable tensioning optimization control method. The method comprises the steps that firstly, basic parameters and unstressed cable length of stay cables are determined, wherein the target tensioning control force of the stay cables of a current construction section and the theoretical distance between a main beam anchor point and a bridge tower anchor point after tensioning is completed are determined; based on the parabola theory, considering the sag effect and the elastic elongation of the stay cable, and solving the unstressed cable length of the stay cable; 2, establishing an adjacent strand tensioning force recursive relation based on a structure coupling effect: simplifying a bridge tower and a main beam structure system into a linear elastic system along the axis direction of the stay cable, and obtaining a nonlinear proportional relation between adjacent strand tensioning forces caused by a structure rigidity and cable body flexible coupling effect; 3, calculating a single-strand tensioning force theoretical value of the whole stay cable under the control of a target value; and 4, anchoring loss compensation and final tensioning force optimization: calculating the precise tensioning force of each strand of the whole stay cable to carry out super tensioning, so that the cable force of the whole stay cable is consistent with a design target.

The utility model relates to a new sector block for a thrust bearing of an immersion pump, a working surface and a supporting surface are connected through a middle rib and a side rib, the middle rib is located at the center of the working surface and the supporting surface, and the side rib is symmetrically arranged on both sides of the working surface and the supporting surface. The utility model's working surface, supporting surface, middle rib and side rib form an elastic system, under the action of working pressure, the sector block can produce slight deformation, the heights of the sector blocks in the same thrust bearing are consistent, the working surface of the sector block can be ensured to be planar, and the effective bearing area will not be reduced; a hollow heat dissipation channel is formed in the middle of the working surface, the supporting surface, the middle rib and the side rib, which can effectively reduce the temperature of the working surface; meanwhile, the supporting ball is located at the center of the supporting surface and opposite to the middle rib, so that a lubricating water film can be formed between the sector block and the sliding plate of the water pump in forward and reverse rotation, and the problem of thrust bearing failure due to reverse rotation of the pump shaft is eliminated.

A trampoline (100) and an elastic system. The trampoline (100) comprises: an elastic member (1) having a first end (11) and a second end (12), wherein the portion of the elastic member (1) between the first end (11) and the second end (12) is a curved energy storage body; and an elastic support (2) comprising vertical support units (21) and a horizontal support unit (22), wherein two sets of vertical support units (21) are arranged on the horizontal support unit (22) in a spaced manner, and the two sets of vertical support units (21) are respectively connected to the first end (11) and the second end (12) of the elastic member (1) by means of connecting units for bilateral supporting and pre-tensioning of the elastic member (1). In addition, when the elastic member (1) is bent and deformed, at least one of the vertical support units (21) and the horizontal support unit (22) can be driven to elastically bend and deform, such that a symmetrical elastic restoring force is applied to the first end (11) and the second end (12) of the elastic member (1) to limit a change in the horizontal distance between the first end (11) and the second end (12) during the bending and deformation of the elastic member (1). The trampoline (100) not only improves the elastic performance of the elastic member (1), but also solves the problems that the amplitude of rise and fall of the elastic member (1) is limited and friction noise may easily be generated due to angular rotation at the two supported ends of the elastic member (1) and a change in the horizontal distance between the two supported ends of the elastic member (1) caused by the bending of the elastic member (1).

The application provides a combined stiffness-adjustable liquid spring vibration isolator and a stiffness adjusting method thereof, and relates to the technical field of liquid spring vibration isolators.The application combines a rubber and an air spring to provide required elastic stiffness.The application collects and processes signals from an inner cylinder displacement sensor, an outer cylinder displacement sensor and a pressure sensor by using an electronic controller (ECU controller), compares and analyzes the signals with preset target displacement difference signals of the inner and outer cylinders, dynamically adjusts a duty cycle of an output pulse width modulation signal based on a comparison result, controls opening and closing of a solenoid valve in an air spring assembly, adjusts stiffness of the air spring, and compensates stiffness reduction caused by aging of a rubber material.The control scheme effectively maintains stability of a vibration isolation frequency of the liquid spring vibration isolator, and ensures performance reliability of a vibration isolation system in a long-term operation process.

A shock-absorbing device comprises a hollow housing with a closed end section and an opposing open end section through which a main axis passes, a resilient system disposed in a bottom section of the housing, a pressing element, and a friction system disposed in the open section of the housing. The resilient system is formed by a dynamic load absorber located in the closed part of the housing along the main axis of the housing on the guide bar. The guide bar has a head for installation thereof in a recess formed in the closed bottom section of the housing for centering the guide bar relative to the main axis. All structural components of the friction system and the resilient system are provided and arranged such that the working stroke of the shock-absorbing device is from 110 to 120 mm.

The invention discloses a tencel and chinlon blended skin-friendly fabric and a preparation method, and relates to the technical field of fabrics, the tencel and chinlon blended skin-friendly fabric comprises an upper layer fabric and a lower layer fabric; the upper-layer fabric and the lower-layer fabric are both blended fabrics of tencel and graphene modified chinlon, and the weight ratio of the tencel to the graphene modified chinlon is (60-70): (30-40); a spacing fiber layer is arranged between the upper-layer fabric and the lower-layer fabric, and the two ends of the spacing fiber layer are in woven connection with the upper-layer fabric and the lower-layer fabric respectively; the blended fabric is formed by weaving warp-wise composite yarn and weft-wise composite yarn, and the weight ratio of the warp-wise composite yarn to the weft-wise composite yarn is 1: (2-2.5). A double-layer interval structure and a multifunctional composite yarn technology are combined, the three-dimensional elastic effect which cannot be achieved by a traditional single-layer fabric is achieved, the interval fiber layer forms elastic supporting columns between the upper-layer fabric and the lower-layer fabric, and the elastic supporting columns and the elastic characteristics of warp and weft composite yarns have a synergistic effect, so that the elasticity of the fabric is improved. And a complete three-way elastic system is constructed.

The invention relates to an actuating device (1) for opening and closing a cover in or on a vehicle, which has a locking and / or latching kinematics which cooperates with the cover. The actuating device has a housing (2) and an actuating part (3) which is received in the housing (2) and is movably supported relative to the housing (2). The actuating part (3) cooperates with the cover in such a way that, when the cover is moved between a closed position and an open position, the actuating part (3) performs a movement between a first position and a second position relative to the housing (2), wherein the actuating part (3) is in a locked state at the first position. The actuating device (1) further has an elastically deformable elastic system (4) which is associated with the actuating part (3), which has in particular a progressive spring characteristic.