Deployable Inflatable Frame Net for RPG Interception
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Solution Overview
Problem
Current methods for intercepting incoming projectiles like rocket propelled grenades (RPGs) often result in omni-directional pressure waves and fragment damage, posing risks to personnel and vehicles.
Innovation Solution
A weapon interceptor projectile with a deployable inflatable frame supporting a net or mesh, using a gas generator for inflation, which deploys to maintain coverage over a constant area and intercepts incoming weapons without a warhead, reducing collateral damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fragmentation warhead interceptor is used to defeat an incoming RPG, then the incoming RPG is destroyed, but an omni-directional pressure wave and shower of fragments are produced that may injure personnel or damage the protected vehicle
Solution Approach 1:
The patent converts the harmful effect of the interceptor's warhead into a beneficial non-fragmenting interception method. Instead of using a warhead that creates fragments and pressure waves, the invention uses a deployable frame with net or mesh that passively intercepts and stops the incoming RPG through physical contact and energy absorption, thereby eliminating the harmful collateral damage while maintaining interception effectiveness
Solution Approach 2:
The patent introduces an intermediary structure (deployable frame with net or mesh) between the interceptor and the incoming RPG. This intermediary serves as a mediator that stops the RPG without requiring a warhead, thereby preventing the generation of fragments and pressure waves while still achieving the goal of defeating the incoming threat
2Shape
If an inflatable structure with airfoil-shaped perimeter is used to deploy the net, then lateral expansion and reduced aerodynamic drag are achieved, but the structure complexity increases
Solution Approach 1:
The patent uses an inflatable structure powered by a gas generator to deploy the net. The inflatable beams with airfoil cross-section expand laterally when inflated, providing both the necessary shape for aerodynamic performance and the mechanical force for deployment, while reducing drag during flight
Solution Approach 2:
The patent employs a dynamic deployment system where the inflatable structure transitions from a compact stowed configuration to an expanded operational configuration. The airfoil-shaped inflatable beams dynamically adjust their shape during flight to optimize aerodynamic performance, and the entire structure can be rapidly deployed when needed
3Stability of the object's composition
If the net or mesh is attached at the center of lift of the airfoil perimeter, then optimal lift distribution and deployment stability are achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by concentrating the attachment function at specific locations (center of lift points) on the airfoil-shaped perimeter. This localized attachment strategy optimizes the lift distribution and deployment stability while allowing the rest of the structure to maintain simpler, more manufacturable characteristics
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively intercepts incoming projectiles with reduced risk of fratricide or collateral damage, utilizing proven automotive air bag technology for high reliability, durability, and low cost, with the ability to engage at various angles and distances.
Implementation Method 1
an inflatable frame inflated using pressurized gases from a gas generator, for example using propellant pellets ignited by an electrical igniter
Implementation Method 2
The perimeter may have an airfoil shape that provides lift that laterally expands the perimeter away from the central axis of the projectile
Data Source
AI summary
A weapon interceptor projectile has a deployable frame for maintaining a deployable net in shape. The deployable frame may be an inflatable structure, including a flexible material inflated by a gas generator. The inflatable structure has a perimeter that supports an outside shape of the net, and a series of spokes or arms that couple the perimeter to a body of the projectile. The perimeter may have an airfoil cross-section shape, reducing drag of the frame and aiding in deployment. The perimeter may be have a circular shape, giving the net a circular area. The deployable frame allows the net to maintain its shape during flight, increasing its area and its ability to come into contact with an incoming weapon, such as a rocket propelled grenade (RPG).