Rollover Protection Actuator Testing via Control Unit
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Solution Overview
Problem
Existing rollover protection systems require costly replacement of pyrotechnic actuators for testing purposes, limiting cost-effective functional reliability and repeated triggering without complex actuator exchanges.
Innovation Solution
A rollover protection system with a control unit that can independently adjust the locking unit into a release position, allowing actuator-independent triggering and retraction of the rollover body, using a pivotable pawl and control slide or lever mechanisms to facilitate testing and demonstration without actuator replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pyrotechnic actuators are used to trigger the rollover protection system, then fast reaction time and reliable locking are achieved, but costly actuator replacement is required for testing purposes
Solution Approach 1:
A control unit is introduced as an intermediary between the actuator and the locking unit. This control unit can be actuated independently to release the locking unit, allowing testing without activating the pyrotechnic actuator. The control unit mediates the triggering mechanism, enabling both reliable operation and cost-effective testing.
Solution Approach 2:
The triggering mechanism is segmented into two independent pathways: one through the pyrotechnic actuator for actual rollover events, and another through the control unit for testing purposes. This segmentation allows the testing function to be separated from the actuator, eliminating the need for costly actuator replacement during tests.
2Stability of the object's composition
If the locking unit is designed to prevent false triggering during normal operation, then system stability is improved, but testing and demonstration become more complex
Solution Approach 1:
The control unit serves as a mediator that bypasses the normal actuator-dependent locking mechanism during testing. By providing an alternative activation pathway, the system maintains its stable locked state during normal operation while enabling simple testing through the control unit without requiring complex procedures.
3Productivity
If the control unit is designed to allow independent triggering, then repeated testing without actuator exchange is enabled, but the locking mechanism becomes more complex
Solution Approach 1:
The control unit is merged with the existing locking unit structure, combining the independent triggering capability with the existing locking mechanism. This integration allows repeated testing without actuator exchange while avoiding the need for a completely separate testing system, thus limiting the increase in overall complexity.
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
Enables cost-effective checking of system reliability and repeated triggering without actuator exchange, ensuring the rollover body remains locked in the rollover position during rollovers and simplifies the return to storage position post-testing.
Implementation Method 1
a drive unit that prestresses the rollover body in the direction of the rollover position
Implementation Method 2
pyrotechnic actuators are used in particular, which can ensure that the rollover bodies are set up in a flash if necessary
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The device (1a) has a derive unit that pretensions a roll over body (2) in a direction of supporting position, where the roll over body is moved between supporting position and roll over position. An adjustable actuator (6) stays in engagement with a locking unit (4) in locking position, where the locking unit is arranged in a controlling unit (7) in locking position. The controlling unit is adjusted in release position, and the locking unit is moved to the release position depending upon the position of the actuator.