Missile Wrap-around Fins Pyrotechnic Deployment Mechanism
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Solution Overview
Problem
Existing missile designs lack a simple and compact mechanism to securely hold winding wings in the rest position during transport and ensure reliable release after launch, with existing solutions either requiring excessive space or being mechanically complex.
Innovation Solution
The implementation of connecting means on the tip-side area of n-1 winding wings and a detachable retaining means on the nth wing, utilizing hooks and a controlled cutting device to securely hold and release the wings, allowing for stable coiling and unhindered deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor and reduction gear are used to rotate the annular element for deploying folding wings, then the wings can be deployed from rest to working position, but the device requires enormous space in the missile interior
Solution Approach 1:
The patent replaces the motor and reduction gear system with a pyrotechnic charge system. The pyrotechnic charge generates gas pressure that directly acts on the annular element to rotate it and deploy the wings, eliminating the need for complex mechanical drive components and significantly reducing the space required in the missile interior.
Solution Approach 2:
The patent changes the operational parameter from mechanical rotation (motor-driven) to pressure-driven rotation (gas pressure from pyrotechnic charge). This parameter change allows the annular element to be rotated without requiring a mechanical transmission system, thus reducing the volume occupied by the deployment mechanism.
2Stability of the object's composition
If holding means are used to secure winding wings in rest position, then the wings remain stable during transport, but the release mechanism becomes more complex
Solution Approach 1:
The patent extracts the holding function from a complex mechanical release mechanism and implements it through a simple pyrotechnic charge system. The holding means secure the wings in the rest position, and the pyrotechnic charge provides a clean, simple release mechanism that burns away or disintegrates to free the annular element, avoiding complex mechanical linkages or electronic systems.
Solution Approach 2:
The patent uses a pyrotechnic charge as a disposable, short-living component that performs the release function and then is consumed or discarded. This eliminates the need for durable, complex mechanical release mechanisms, as the pyrotechnic charge provides a simple, reliable, and space-efficient solution that requires no recovery or resetting.
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
This solution enables the wings to be stably held during transport and safely released after launch, ensuring reliable deployment without mechanical hindrance, using a simple and compact design that functions under various environmental conditions.
Implementation Method 1
The ring-shaped element is set in rotation by means of a pyrotechnic charge and the resulting gas pressure
Implementation Method 2
The lugs are spring-loaded and can be received in recesses in the winding wings in the coiled state
Data Source
Figure 1
Figure 2~3
AI summary
A device on wrapped wings (1, 2, 3) of a flying object (5) having n (at least 2) wings rotatably mounted on the object outer surface on axes in the flying direction, lying on the surface in rest position and opened by a drive into working position, comprises first fixtures on the tip side regions of (n - 1) wings, corresponding in the rest position to further fixtures on the outer side of the wing underneath and gripping a controlled-release holder on the tip side region of the n'th wing.