Motor Vehicle Control Device Dynamic Speed Profile
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Solution Overview
Problem
Existing motor vehicle adjustment systems, such as those for tailgates, face challenges in preventing foreign object trapping due to delays in signal processing and inertia, leading to potential jamming issues despite anti-trap protection mechanisms.
Innovation Solution
A control device with a computing unit that regulates adjustment movements by comparing actual speed with setpoint speeds, using multiple adjustment phases with varying speed profiles, and adapting to environmental factors like temperature and slope to ensure a control reserve, thereby reducing the risk of pinching and maintaining smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive speed is reduced in the clamping area to prevent foreign object trapping, then the safety protection is improved, but the adjustment time increases
Solution Approach 1:
The patent applies dynamics by continuously varying the drive speed according to a time-dependent setpoint speed profile rather than using fixed speed stages. The setpoint speed is dynamically adjusted based on the current time and position, allowing the system to optimize between safety and speed in real-time during the adjustment process
Solution Approach 2:
The patent changes the speed parameter continuously over time according to a predefined function. The setpoint speed transitions from a first value to a second value and then to a third value in a controlled manner, optimizing the balance between prevention of foreign object trapping and minimization of adjustment time
2Illumination intensity
If the drive speed is continuously reduced according to a functional relationship, then the optical impression of the adjustment movement is improved, but the control complexity increases
Solution Approach 1:
The computing unit continuously compares the actual speed with the setpoint speed and adjusts the drive accordingly. This feedback mechanism ensures that the actual speed follows the desired time-dependent profile, creating an optimized optical impression while managing control complexity through systematic regulation
Solution Approach 2:
The system uses dynamic speed profiling where the setpoint speed changes continuously over time according to a predefined function. This creates an optimized visual perception of the adjustment movement while the underlying control logic manages complexity through structured time-based control
Data Source
Figure 1
Figure 2a~2b
AI summary
The system has a control device with a computing unit having functions for controlling the system, and a sensor measuring a drive actual speed. The unit compares the actual speed with a reference speed. The computing unit determines the reference speed from a starting position to a destination position by a reference function with a number of adjusting phases with different reference speed or characteristics of the reference speed. The computing unit determines the reference speed or the characteristics within one of the phases depending on the starting position and/or destination position.