Parking Support Device Dynamic Speed Control
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Solution Overview
Problem
Existing parking support devices struggle to reduce control time for parking, as they maintain constant speed, making it difficult for drivers to accelerate and complete parking efficiently.
Innovation Solution
A parking support device with a calculation unit to generate a speed pattern and an acceleration recognition unit to adjust vehicle speed based on driver input, allowing acceleration when necessary and deceleration at set rates to reach a target parking position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If constant speed is maintained during parking support control, then the accuracy of steering angle is maintained, but the control time until parking is completed increases
Solution Approach 1:
The patent applies dynamics by transitioning from constant speed control to variable speed control. The control unit dynamically adjusts vehicle speed based on real-time conditions, allowing acceleration when the driver intends to speed up and deceleration when approaching the target parking position. This dynamic speed adjustment reduces control time while maintaining steering accuracy through coordinated control.
Solution Approach 2:
The patent changes the speed parameter from constant to variable during parking support control. By modifying the speed parameter based on driver input (accelerator depression) and proximity to target position, the system achieves faster parking completion. The steering angle accuracy is preserved through independent control adjustment while speed varies to reduce time loss.
2Measurement precision
If constant speed is maintained during parking support control, then steering angle accuracy is maintained, but the ability to respond to driver acceleration intentions is reduced
Solution Approach 1:
The patent implements feedback by monitoring driver acceleration intentions through accelerator depression detection. The control unit receives feedback from the driver's operational input and adjusts vehicle speed accordingly. This feedback mechanism allows the system to adapt to driver intentions while maintaining steering angle accuracy through separate control pathways.
Solution Approach 2:
The system becomes dynamic by allowing speed variations in response to driver input. The control unit dynamically adjusts speed based on accelerator depression, enabling the vehicle to respond to driver intentions. Steering angle accuracy is maintained through independent control, creating a dynamic yet precise parking support system.
3Loss of time
If the vehicle accelerates according to driver request during parking support, then control time is reduced, but the risk of overshooting the target parking position increases
Solution Approach 1:
The patent applies preliminary anti-action by pre-planning deceleration before the vehicle reaches the target parking position. The control unit calculates the distance to target and initiates deceleration in advance, preventing overshooting. This allows the vehicle to accelerate according to driver requests during the approach phase while ensuring reliable stopping at the target position.
Solution Approach 2:
The system performs preliminary action by preparing for deceleration before reaching the target. The control unit anticipates the need to stop and initiates deceleration sequences in advance, allowing aggressive acceleration phases without risking overshoot. This preliminary deceleration action ensures reliable parking position accuracy while maintaining reduced control time.
Data Source
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AI summary
A parking support device 1 includes a calculation unit 17 that calculates a speed pattern, an acceleration recognition unit 13 that recognizes driver-requested acceleration, a parking support control unit 19 that performs parking support control in a target parking position based on the speed pattern, and a determination unit 18 that determines whether a host vehicle V can stop in the target parking position at a set deceleration. When the driver-requested acceleration is recognized during the control and exceeds acceleration of the speed pattern at the time of recognition, the parking support control unit 19 accelerates the host vehicle V at the driver-requested acceleration. When the determination unit 18 determines that the host vehicle V can stop in the target parking position at the set deceleration, the host vehicle V is decelerated at the set deceleration and is stopped in the target parking position regardless of the driver-requested acceleration.