Steering Control Constant Calculation Across Vehicle State Transitions
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Solution Overview
Problem
Existing steering control systems require significant manual effort to set control constants that account for transitions in vehicle state values, leading to potential deterioration in control characteristics.
Innovation Solution
An input/output device that includes a control constant holding unit, a target characteristic setting unit, and a control constant calculation unit to automatically calculate and set control constants for varying vehicle states, reducing the need for manual adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual setting of control constants is performed for each vehicle state value, then control characteristics can be optimized for specific states, but the number of man-hours required for setting work increases significantly
Solution Approach 1:
The system performs self-service by automatically calculating control constants based on pre-stored first control constants and calculated second control constants, eliminating the need for manual setting work while maintaining optimized control characteristics for different vehicle states
Solution Approach 2:
The system changes parameters by automatically adjusting control constants according to vehicle state values. The control constant calculation unit computes appropriate control constants for different vehicle states based on mathematical relationships, enabling parameter adaptation without manual intervention
2Ease of operation
If control constants are set without considering vehicle state value transitions, then setting work is simplified, but control characteristics deteriorate during state transitions
Solution Approach 1:
The system performs preliminary action by pre-storing first control constants for different vehicle state values and pre-calculating the mathematical relationships between them. This allows the control constant calculation unit to automatically determine appropriate control constants for any given vehicle state without manual setting, ensuring consistent control characteristics throughout state transitions
3Adaptability or versatility
If multiple controllers are used for steering control, then control flexibility is improved, but the number of control constants that need to be set increases
Solution Approach 1:
The system applies universality by creating a unified control constant calculation approach that works across multiple controllers. The control constant calculation unit calculates control constants for any controller based on the same mathematical relationships and pre-stored first control constants, reducing the overall complexity of managing multiple controllers while maintaining control flexibility
Data Source
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AI summary
An input/output device according to the present disclosure includes: a control constant holding unit configured to hold a first control constant corresponding to a first vehicle state value; a target characteristic setting unit configured to set a second target characteristic which is a target value of a control characteristic of the steering in a second vehicle state value different from the first vehicle state value; and a control constant calculation unit configured to calculate a second control constant corresponding to the second vehicle state value based on the first control constant and the second target characteristic and output the second control constant to the steering control device.