Flexible Net Shield with Angled Rods for RPG Dud
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Solution Overview
Problem
Existing countermeasures against rocket propelled grenades (RPGs) are ineffective, expensive, complex, and unreliable, and static armor systems are heavy, difficult to install, and do not prevent detonation, while current lightweight solutions like chain link fencing are insufficient in preventing RPG penetration.
Innovation Solution
A lightweight, flexible net shield system with interconnected rods and nodes, featuring hard points and a compliant net design that prevents detonation by angling inwardly to dud the RPG, easily attachable and removable from vehicles or structures, using hook and loop fasteners and telescoping frames for adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static armor is added to protect against RPGs, then protection effectiveness is improved, but vehicle weight increases and maneuverability deteriorates
Solution Approach 1:
The armor system is divided into modular panels that can be selectively installed on different vehicle zones. Each panel is a self-contained unit with standardized mounting interfaces, allowing partial coverage rather than full vehicle encasement, thus reducing overall weight while maintaining protection in critical areas.
Solution Approach 2:
The armor system incorporates movable and adjustable components that can be repositioned or removed based on operational requirements. This dynamic configuration allows the vehicle to optimize between protection and maneuverability depending on the mission profile.
2Reliability
If bar/slat armor is installed to prevent RPG detonation, then protection against shaped charge is improved, but installation complexity and time increase
Solution Approach 1:
The bar/slat armor is divided into discrete, pre-fabricated panels with standardized dimensions and mounting features. Each panel can be independently installed using simple fastening mechanisms, dramatically reducing installation complexity and time compared to custom-fitted bar/slat systems.
Solution Approach 2:
The armor panels utilize standardized mounting parameters and interface specifications that simplify the installation process. Consistent hole patterns, universal fasteners, and modular dimensions transform a complex custom installation into a routine assembly task.
3Weight of moving object
If chain link fence shield is added to reduce weight, then vehicle weight is reduced, but protection effectiveness against RPG penetration deteriorates
Solution Approach 1:
The shield system combines multiple materials with complementary properties: lightweight aluminum or composite panels for the basic structure, supplemented by ceramic tiles or metal mesh for enhanced ballistic resistance. This composite approach achieves RPG protection levels without the weight penalty of solid steel armor.
Solution Approach 2:
Rather than uniformly thick armor across the entire vehicle, the system applies enhanced protective materials only in areas most vulnerable to RPG impacts (front, sides, engine compartment), using lighter materials elsewhere. This localized protection strategy optimizes the weight-protection ratio.
4Reliability
If heavily armored vehicle is deployed to resist RPG attacks, then protection effectiveness is improved, but fuel consumption increases
Solution Approach 1:
The armor system is implemented as selective modular panels rather than complete vehicle encasement, reducing total armor mass and consequently the energy required to move the vehicle. Critical zones receive protection while non-critical areas remain lightweight.
Solution Approach 2:
The armor thickness and material density are optimized to provide adequate protection against typical RPG threats while minimizing weight. This parameter optimization balances protection effectiveness with acceptable fuel consumption levels.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A shield for a vehicle comprising: ∙ a flexible compliant net subsystem (10) with strands designed to break if struck by a projectile; ∙ an array of rods (12) on the net subsystem (10), the rods (12) designed and attached to the net subsystem (10) in such a manner that the rods (12) impact an ogive of a projectile striking the shield; ∙ a frame (16) including mounting brackets (18a-18d) attached thereto positioning the frame (16) in a spaced relationship with respect to a vehicle or structure; and ∙ the net subsystem (10) being secured to the frame (16).