Steering Reaction Force Control With Adaptive Phase Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing steering control systems face challenges in maintaining stability when power transmission between the steering shaft and turning wheels is cut off, as arbitrary adjustments in steering system characteristics can impair the effectiveness of phase compensation processing.
Innovation Solution
A steering control device that includes a processor to execute reaction force setting, phase compensation, and axial force gradient calculation processing, allowing for dynamic adjustment of phase compensation variables and axial force gradients to suit the steering system's characteristics, even in the absence of power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the characteristics of the steering system are arbitrarily adjusted in a state where power transmission is cut off, then the degree of freedom in adjusting steering system characteristics is increased, but the effectiveness of phase compensation processing is impaired
Solution Approach 1:
The invention dynamically adjusts the axial force gradient based on the phase compensation regulation variable. Instead of using a fixed axial force gradient, the system calculates and applies an adjusted axial force gradient that compensates for the phase shift introduced by arbitrary steering system characteristics. This dynamic adjustment maintains the effectiveness of phase compensation processing while allowing freedom in steering system configuration.
Solution Approach 2:
The invention changes the parameter of axial force gradient based on the phase compensation regulation variable. By modifying the axial force gradient parameter in response to the phase compensation needs, the system ensures that phase compensation remains effective even when other steering system characteristics are arbitrarily adjusted. This parameter change approach resolves the contradiction by making the axial force gradient adaptive to different operating conditions.
2Stability of the object's composition
If phase compensation processing is applied to stabilize the steering system, then system stability is improved, but the flexibility in adjusting steering characteristics is reduced
Solution Approach 1:
The invention makes the axial force gradient dynamic rather than fixed. The axial force gradient is continuously adjusted based on the phase compensation regulation variable, allowing the phase compensation processing to adapt to different steering characteristics while maintaining system stability. This dynamic approach enables both stability and flexibility to coexist.
Solution Approach 2:
The invention changes the axial force gradient parameter in response to the phase compensation needs. By adjusting this parameter dynamically, the system maintains stability through effective phase compensation while simultaneously allowing flexibility in steering characteristic adjustments. The parameter change mechanism enables the system to accommodate various steering configurations without compromising stability.
Data Source
AI summary
A processor is configured to execute reaction force setting processing, reaction force application processing, axial force gradient calculation processing, and interlock processing. The reaction force setting processing is processing of setting steering reaction force using phase compensation processing. The reaction force application processing is processing of operating a reaction force motor with reaction force set by the reaction force setting processing as input. The axial force gradient calculation processing is processing for calculating an axial force gradient as a variable indicating the ratio of the change in resisting force against rotation of the steering shaft to the change in rotation angle of the steering shaft. The interlocking processing is processing of changing one of both the value of a phase compensation regulation variable as a variable for regulating a manner of the phase compensation and the axial force gradient according to the other.