Buoyant Target Radar Reflector Stability
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Solution Overview
Problem
Conventional buoyant, inflatable targets for gunfire training are prone to movement due to water currents and waves, lack sufficient radar reflectivity, and pose electrical hazards or are top-heavy due to metallic materials, making them impractical for simulating stable battle targets.
Innovation Solution
A buoyant target with a flexible inflatable structure and a radar reflector device comprising three mutually orthogonal planes, secured inside the target to enhance stability and radar reflectivity, while a drogue chute allows water to fill for stabilization and easy recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal shavings are mixed with viscous liquid and poured inside the inflated target to increase radar reflectivity, then radar reflectivity is enhanced, but the metal shavings settle to the bottom over time providing insufficient reflectivity
Solution Approach 1:
The patent changes the physical state of the radar reflector from loose metal shavings to a solid foam structure. The foam material maintains its shape and position within the target, preventing settling while providing consistent radar reflectivity. This phase change from liquid-suspended particles to solid foam structure resolves the stability issue.
Solution Approach 2:
The patent uses a composite material approach by combining radar-reflective properties with foam structure. The foam material provides both the structural integrity to maintain position and the radar-reflective characteristics needed for detection, creating a stable composite solution that addresses both reflectivity and distribution stability.
2Reliability
If metallic sheet materials are attached on the exterior of an inflatable target to increase radar reflectivity, then radar reflectivity is enhanced, but the metallic material presents an electrical hazard during deployment and retrieval
Solution Approach 1:
The patent replaces expensive and hazardous metallic materials with a safer, non-conductive foam material that provides equivalent or superior radar reflectivity. This substitution eliminates the electrical hazard while maintaining the functional requirement for radar detection.
Solution Approach 2:
The foam material acts as an intermediary that provides radar reflectivity without the electrical conductive properties of metal. This intermediate solution bridges the gap between the need for radar detection and the requirement for electrical safety during deployment operations.
3Reliability
If metal plates are attached to increase radar reflectivity, then radar reflectivity is enhanced, but the target becomes top heavy and unwieldy during deployment and retrieval
Solution Approach 1:
The patent changes the density and weight parameters by replacing heavy metal plates with lightweight foam material. This parameter change maintains the radar-reflective function while dramatically reducing the weight, making the target easier to deploy and retrieve without requiring additional equipment or personnel.
4Stability of the object's composition
If anchors or drogue chutes are added to prevent excessive movement, then stability is improved, but conventional drogue chutes cannot be emptied to permit convenient target recovery
Solution Approach 1:
The foam-filled structure serves multiple functions simultaneously: it provides stability against wind and currents, maintains the target's shape and orientation, and enables easy recovery by simply draining water. This multi-functional design eliminates the need for separate anchoring and recovery mechanisms.
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 target maintains upright orientation, provides enhanced radar reflectivity, and facilitates accurate gunnery training by stabilizing against wind and water currents, allowing for efficient deployment and retrieval without electrical hazards.
Implementation Method 1
a radar reflector device disposed inside the inflatable structure, the radar reflector device comprising a plurality of 3-surface orthogonal reflectors configured to reflect a radar signal
Implementation Method 2
an inflatable structure formed of a flexible material that allows the inflatable structure to expand from a collapsed state to an inflated state
Implementation Method 3
a drogue chute allows water to fill for stabilization and easy recovery
Implementation Method 4
a drogue chute allows water to fill for stabilization
Data Source
AI summary
A buoyant target comprises an inflatable structure with a drogue chute attached to the periphery of the bottom of the inflatable structure. The drogue chute is an open flexible structure with a bottom end weighted with ballast to deploy it, and with ports through its side to permit water to flow into and out of it. A radar reflector device is attached inside the inflatable structure. The radar reflector device comprises a plurality of mutually orthogonal radar reflective surfaces having central reflection vectors pointed at predetermined directions.