Steering Control Unit Distortion Compensation
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Solution Overview
Problem
Existing vehicle steering systems fail to accurately control the steering angle due to distortion in the steered mechanism, leading to deviations from the target route.
Innovation Solution
A control unit that sets the steered element angle, which accounts for the distortion in the steered mechanism, is used to control the electric motor, ensuring accurate alignment with the target route by correlating the steering angle with the steered element angle and adjusting the motor control accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electric motor is controlled without considering distortion of the steered mechanism, then the control structure remains simple, but the steering angle control accuracy deteriorates
Solution Approach 1:
A steered element angle sensor is introduced as an intermediary component to detect the actual steered element angle in the steered mechanism. This sensor provides direct feedback on the distorted position, allowing the control unit to compensate for mechanism distortion without fundamentally changing the control structure. The sensor acts as a mediator between the motor control system and the steered mechanism, enabling accurate control while maintaining structural simplicity.
Solution Approach 2:
The control unit implements feedback control by continuously monitoring the steered element angle through the sensor and adjusting the motor output accordingly. The feedback mechanism compares the actual steered element angle with the target angle and dynamically compensates for distortion effects, thereby improving steering angle control accuracy without significantly increasing system complexity.
2Measurement precision
If the steered element angle is used in control over the electric motor, then the steering angle control accuracy is improved, but the device complexity increases
Solution Approach 1:
The steered element angle sensor serves as an intermediary that directly measures the distorted position in the steered mechanism. By placing the sensor at this critical point, the system obtains accurate distortion information without adding complex measurement systems elsewhere. This intermediary approach improves control accuracy while minimizing the increase in device complexity.
Solution Approach 2:
The patent replaces complex mechanical linkage systems with an electronic sensing and control system. Instead of using purely mechanical means to achieve accurate steering control, the system uses electronic sensors and control algorithms to compensate for mechanical distortion, thereby improving accuracy while keeping the overall device complexity manageable through electronic substitution.
Data Source
AI summary
In a control unit for a vehicle steering system, which controls an electric motor that is used to change a steering angle on the basis of a target route for a vehicle, a turning angle of a steered wheel with respect to a central axis of a shock absorber is set as a steered element angle, and the steered element angle is used in control over the electric motor.