Steering Motor Control Redundancy via Three-Phase Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current steering systems lack redundancy and reliability, particularly in scenarios where one or more controllers fail, leading to potential reductions in steering performance and safety.
Innovation Solution
A steering control device and method that employs three steering controllers connected to separate windings of a steering motor, allowing for monitoring and control of the motor's output even if one controller fails, by redistributing assistance current among the remaining normal controllers, ensuring continued optimal steering performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single steering controller is used to control the steering motor, then the device complexity is reduced, but the reliability and redundancy of the steering system deteriorates
Solution Approach 1:
The steering control system is divided into three independent steering controllers (first, second, and third controllers), each capable of independently controlling one phase of the three-phase steering motor. This segmentation allows the system to maintain functionality even if one controller fails, as the remaining controllers can continue to operate the motor in a degraded but still functional mode, thereby improving reliability without requiring an overly complex unified controller
2Reliability
If three steering controllers are used to control the steering motor, then the reliability and redundancy of the steering system improves, but the device complexity increases
Solution Approach 1:
Each of the three steering controllers is designed with universal functionality to control one phase of the three-phase steering motor. The controllers are structurally identical and can independently perform the complete control function for their respective phase, including monitoring, current control, and fault detection. This multi-functionality approach allows the system to achieve high reliability through redundancy while keeping each controller's design relatively simple and standardized
3Reliability
If one steering controller fails, then the reliability of the steering system deteriorates, but with three controllers the system can maintain performance through current redistribution
Solution Approach 1:
The steering control system dynamically adapts its operation mode based on the operational status of the controllers. When all three controllers are functional, the system operates in normal mode with full steering assistance. When one controller fails, the system automatically transitions to a degraded mode where the remaining two controllers redistribute and increase their current output to compensate for the failed controller's phase, thereby maintaining adequate steering assistance performance despite the reduction in redundancy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances redundancy and reliability by enabling the steering system to maintain performance even if one controller fails, without reducing steering assistance, thus improving vehicle safety and operational stability.
Implementation Method 1
a first steering controller connected to a first winding of a steering motor; a second steering controller connected to a second winding of the steering motor; and a third steering controller connected to a third winding of the steering motor
Data Source
AI summary
A steering control device, a steering motor, a steering apparatus, and a steering control method are provided. The steering control device includes a first steering controller connected to a first winding of a steering motor, a second steering controller connected to a second winding of the steering motor, and a third steering controller connected to a third winding of the steering motor. The first to third steering controllers may monitor corresponding states and control the steering motor in accordance with a result of the monitoring.