Crash Sled With Coupling Rod For Pitching Yawing And Rolling Simulation
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Solution Overview
Problem
Existing crash sled devices are unable to simulate complex acceleration behaviors, including rolling movements, and are unsuitable for heavy test objects and high impact loads, limiting their effectiveness in replicating real crash scenarios.
Innovation Solution
A crash sled device with a lower and upper part, where the upper part is supported by actuators and a coupling rod, allowing for the simulation of pitching, yawing, and rolling movements, with at least five actuators between the parts to generate these movements, and a coupling rod that absorbs longitudinal forces, ensuring the actuators remain functional and compact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If simple crash sled devices are used, then the structure is simple and easy to operate, but they can only reproduce accelerations in axial direction and cannot simulate pitching, yawing, or rolling movements
Solution Approach 1:
The sled is divided into a lower part and an upper part, with the upper part serving as a carrier for test objects. This segmentation allows independent control of the upper part's movements (pitching, yawing, rolling) relative to the lower part, enabling complex acceleration behaviors to be simulated while keeping each segment's structure relatively simple.
Solution Approach 2:
The upper part is made movable relative to the lower part through actuators that can generate pitching, yawing, and rolling movements. This dynamic configuration allows the sled to adapt to different crash scenarios and simulate complex acceleration patterns, transforming a static structure into a versatile testing platform.
2Adaptability or versatility
If devices with actuators for pitching and yawing movements are used, then complex acceleration behaviors can be simulated, but they are unsuitable for heavy test objects and great impact loads
Solution Approach 1:
A coupling rod is provided that propps the upper part against the lower part at the front end, preliminarily absorbing longitudinal forces before impact occurs. This preliminary action ensures that the actuators remain functional during high-impact scenarios and heavy test objects, as the coupling rod bears the longitudinal loads while the actuators focus on generating rotational movements.
Solution Approach 2:
The coupling rod acts as an intermediary element between the upper and lower parts, specifically designed to absorb longitudinal forces. This intermediary structure protects the actuators from excessive longitudinal loads, ensuring their reliability when simulating crashes involving heavy test objects or high impact forces.
3Adaptability or versatility
If more actuators are added to simulate rolling movements, then complete acceleration simulation is achieved, but the device complexity increases
Solution Approach 1:
The actuators are strategically positioned and configured to perform multiple functions. For example, actuators at the front and rear ends can generate pitching movements while also contributing to yawing and rolling movements through their rotational capabilities. This merging of functions reduces the total number of actuators needed while achieving complete simulation of complex acceleration behaviors.
Solution Approach 2:
Each actuator is designed with universal functionality, capable of generating multiple types of movements (pitching, yawing, rolling) depending on its activation pattern. The front and rear actuators can work independently or in combination to produce different movement types, making the system more versatile with fewer components.
Data Source
AI summary
A device for simulating the effects of a crash on a test object is provided. The device includes a sled adapted to be accelerated in the longitudinal direction. The sled comprises a lower part and an upper part supported thereon used as a carrier for the test object. The lower part and the upper part have actuators provided between them, whereby pitching and yawing movements of the upper part can be generated. The upper part is, on an impact-side front end of the sled, propped against the lower part by means of a coupling rod which is rotatably coupled on both sides thereof, at least five actuators provided between the lower part and the upper part, the upper part being supported on the lower part via the actuators and the coupling rod such that a rolling movement of the upper part can additionally be generated by means of the actuators.