Steer-by-Wire Redundant Regulation Tracks for Fault Damping
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Solution Overview
Problem
Existing steer-by-wire steering systems face challenges in maintaining steering capability during faults, as actuating circuit breakers becomes impossible, leading to a total failure of the steering system.
Innovation Solution
Implementing a method with redundant regulation tracks and damping functions, allowing the steering system to operate with reduced power and adapt track requirements to compensate for faults, ensuring continued steering capability through redundancy and damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If circuit breakers are actuated to provide damping in the event of a fault, then steering capability is extended for a longer time, but this becomes impossible when circuit breakers can no longer be actuated
Solution Approach 1:
The power converter is divided into multiple independent regulation tracks (first regulation track with first set of windings, second regulation track with second set of windings). Each track can operate independently to provide damping, ensuring that if one track fails, the other can still extend steering capability duration.
Solution Approach 2:
The system changes the operational parameters by switching between different regulation tracks based on fault detection. When a fault is detected in one track, the system activates the other track to provide damping, thereby maintaining steering capability extension without requiring circuit breaker actuation.
2Duration of action of moving object
If multiple regulation tracks are implemented to provide redundancy, then steering capability is extended in the event of fault, but device complexity increases
Solution Approach 1:
Multiple regulation tracks are designed with identical functional capabilities, where each track can independently provide damping and extend steering capability. This universal design allows any track to replace another in case of failure, achieving redundancy without requiring fundamentally different components.
Solution Approach 2:
The power converter is segmented into independent regulation tracks that can be controlled separately. This modular segmentation allows the system to activate only the necessary tracks based on operational needs and fault conditions, managing complexity through independent, standardized units.
3Duration of action of moving object
If damping function is applied to extend steering capability, then steering capability duration is extended, but power consumption increases
Solution Approach 1:
The damping function is applied periodically or intermittently rather than continuously. The control device activates damping only when faults are detected and when extension of steering capability duration is necessary, rather than maintaining constant damping that would consume excessive power.
Solution Approach 2:
The damping function provides partial compensation for steering capability rather than full continuous operation. By applying damping selectively based on fault conditions, the system extends steering capability duration without the excessive energy consumption that would result from continuous damping application.
Data Source
AI summary
The present disclosure relates to a method for operating a steering system, a steering system and to a vehicle. The steering system comprises at least one steering device that is able to be adjusted by way of at least one electric motor that is driven by a power converter. The power converter has at least two regulation tracks each having at least one set of windings, at least one sensor assigned to the set of windings, a control device and a plurality of switching devices. The control devices, which are assigned to different regulation tracks, are coupled to one another by way of a coupling device.