Vehicle Dynamic Control Apparatus Actuator Prioritization
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Solution Overview
Problem
Existing vehicle dynamic control systems fail to optimize control requests to controlled objects, often exceeding their performance limitations and not considering the controllable range of each object, leading to suboptimal control of lateral, longitudinal, and pitching motions.
Innovation Solution
A vehicle dynamic control apparatus that determines the order and selects controlled objects based on their availability, or controllable range, to ensure that control requests do not exceed performance limitations and optimally manage dynamics, using an availability obtainer and selector to prioritize and adjust control requests according to current vehicle conditions and motion parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control requests are issued to multiple controlled objects without considering their controllable range, then the control system can attempt to achieve desired vehicle dynamics, but the control requests may exceed the performance limitations of individual controlled objects
Solution Approach 1:
The patent dynamically determines the controllable range of each controlled object based on current vehicle conditions (speed, acceleration, steering angle, etc.) and adjusts control requests accordingly. The ECU modifies the availability of each controlled object in real-time, making the control system adaptive to changing operational conditions while ensuring requests remain within feasible limits
Solution Approach 2:
The system changes the parameter of controllable range (availability) for each controlled object based on vehicle state. By monitoring parameters like vehicle speed, lateral acceleration, and steering angle, the ECU adjusts the maximum allowable control magnitude for each actuator, ensuring control requests match current performance capabilities
2Speed
If the order of activating controlled objects is not optimized based on controllable range, then all controlled objects can be activated, but the control response may not be optimal especially in emergency situations
Solution Approach 1:
The patent performs preliminary assessment of each controlled object's controllable range and availability before activation. The ECU pre-determines which controlled objects can effectively respond to control requests and establishes an optimal activation order based on their current availability, ensuring the most responsive objects are activated first
Solution Approach 2:
The system continuously monitors vehicle dynamics and controlled object states, using this feedback to adjust the activation order and control distribution. Based on real-time feedback about which controlled objects are most effective, the ECU dynamically reorders activation priorities to maximize control response speed and efficiency
Data Source
AI summary
A vehicle dynamic control apparatus is designed to control a plurality of controlled objects according to a request value of a first parameter from an application associated with motion of a vehicle in a same direction to fulfill the request value of the first parameter. An availability obtainer obtains an availability corresponding to a controllable range of a second parameter of each of the plurality of controlled objects, the second parameter being associated with motion of the vehicle in the same direction. A selector determines an order of the plurality of controlled objects to be controlled based on the availability of the second parameter of each of the plurality of controlled objects, and selects at least one of the plurality of controlled objects to be controlled in accordance with the determined order.