Vehicle Sliding Door Speed Feedback Control via Segmented Regions
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Solution Overview
Problem
Heavy sliding doors face challenges in optimizing speed feedback control, leading to hunting issues when increasing responsivity for target speed matching, and stability concerns when reducing responsivity.
Innovation Solution
A vehicle opening-closing body controller that divides the movement route into multiple control regions, adjusting the control characteristics of speed feedback control for each region, using longer control cycles for stability and shorter cycles for increased responsivity, particularly in regions like the curved portion passage section to manage centrifugal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the responsivity of speed feedback control is increased to improve target speed matching capability, then the target speed matching capability is improved, but hunting occurs in the movement speed
Solution Approach 1:
The movement route of the opening-closing body is divided into multiple control regions (first control region, second control region, third control region) based on position. Different control characteristics are applied to each region: high responsivity in the first region for quick response, reduced responsivity in the second region to prevent hunting, and adjusted responsivity in the third region for stable approach to target position. This spatial segmentation resolves the contradiction by allowing high target speed matching where needed while maintaining stability in critical regions.
Solution Approach 2:
Different control characteristics (different responsivity settings) are applied to different spatial regions of the movement route. The control unit adjusts the control characteristic of speed feedback control according to the detected position within each control region. This allows the system to have high responsivity where target matching is critical while maintaining stability in regions where hunting would be problematic.
2Stability of the object's composition
If a low responsivity is set to ensure stability, then stability is improved, but the target speed matching capability falls
Solution Approach 1:
The movement route is segmented into control regions with different responsivity requirements. The first control region uses high responsivity for rapid target speed matching, while the second and third regions use reduced responsivity for stability. This segmentation allows the system to achieve both high target speed matching capability and stability by applying appropriate control characteristics in different spatial zones.
Solution Approach 2:
The control characteristic (responsivity) is dynamically adjusted based on the position of the opening-closing body within control regions. The control unit changes the control characteristic of speed feedback control according to the detected position, transitioning between high and low responsivity settings as the body moves through different regions. This dynamic adjustment resolves the contradiction by adapting the control特性 to the specific phase of movement.
Data Source
AI summary
A control device for opening and closing bodies of vehicles comprises a driving device that drives an opening and closing body of a vehicle and a controlling unit that controls operation of the driving device. The controlling unit is configured so as to cause the opening and closing body to move while controlling the speed of the opening and closing body movement by executing speed feedback control and to set a plurality of control regions over the range of movement of the opening and closing body and change control properties for the speed feedback control in each of the control regions.