Dynamic Control Object Selection for Vehicle Motion
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Solution Overview
Problem
Existing vehicle motion control systems do not optimally select control objects based on their availability and priority, leading to suboptimal control responses, especially in emergency situations where fast and well-responsive control is required.
Innovation Solution
A vehicle motion control apparatus that includes a control object selection unit capable of determining the priority of control objects and reselecting them based on changing priority determination conditions, ensuring optimal control object selection for vehicle motion control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control objects are selected sequentially in a fixed order to suppress vehicle motion states, then the control logic is simple, but the control responsiveness and optimality deteriorate in emergency situations
Solution Approach 1:
The patent implements dynamic selection of control objects based on real-time vehicle states and availability conditions. Instead of a fixed sequential control logic, the system continuously evaluates which control object (steering, braking, or powertrain) should be activated based on current vehicle dynamics parameters such as yaw rate, lateral acceleration, and availability conditions, enabling optimal control responsiveness in emergency situations
Solution Approach 2:
The system changes the control parameter by selecting different control objects based on availability conditions and vehicle states. The control strategy dynamically adjusts which control object is prioritized by evaluating parameters such as control amount, responsiveness requirements, and current vehicle motion state, thereby optimizing control effectiveness without requiring complex fixed-order logic
2Device complexity
If control objects are selected based on control amount only, then the selection criterion is simple, but the control optimality deteriorates when fast response is required
Solution Approach 1:
The patent introduces multiple selection criteria beyond control amount, including responsiveness requirements, vehicle state parameters, and availability conditions. The system dynamically adjusts the weighting and importance of different selection criteria based on the situation, allowing optimal control object selection that balances simplicity with reliability in emergency scenarios
3Stability of the object's composition
If a fixed control object selection is maintained, then the control system is stable, but the adaptability deteriorates when priority determination conditions change
Solution Approach 1:
The patent implements a dynamic reevaluation mechanism that monitors changes in priority determination conditions such as vehicle state parameters and availability conditions. When these conditions change beyond predefined thresholds, the system automatically reevaluates and adjusts control object selection, maintaining stability during normal operation while adapting to emergency situations
Solution Approach 2:
The system continuously monitors vehicle states and availability conditions as feedback parameters, using this information to dynamically adjust control object selection. The feedback mechanism ensures that the control system adapts to changing conditions while maintaining overall stability through controlled reevaluation rather than constant fluctuation
Data Source
AI summary
A vehicle motion control apparatus configured to control a plurality of control objects in a same direction of vehicle motion control to achieve a requested control amount is provided. The vehicle motion control apparatus includes a control object selection unit which is configured to determine priority of the control objects used for the vehicle motion control based on a priority determination condition, to select a control object from among the plurality of control objects. The control object selection unit includes a control object selection timing determination section configured to detect a change in the priority determination condition, and cause the control object selection unit to reselect a control object at a timing of the change detection as a selection timing.