Vehicle Control System Actuator Target Value Realizability
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Solution Overview
Problem
Existing on-vehicle control systems face challenges in ensuring that target values for vehicle state quantities, such as temperature and humidity, can be realized by the actuators, due to variations in actuator configurations and abilities, leading to unrealizable target values.
Innovation Solution
The system includes a control architecture with multiple ECUs that output user desires as target values for actuators, with feedback mechanisms to define controllable ranges based on actuator capabilities, ensuring that target values fall within achievable limits, and adjusts interim target values if they exceed these ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the second output means determines target values based solely on user desire without actuator capability feedback, then the element can be designed independently and commonly used across different vehicle types, but the target values may not be realizable by the actuators
Solution Approach 1:
The third output means feeds back capability information (controllable ranges) of the actuator to the second output means. This feedback loop enables the second output means to adjust target values to be within realizable ranges while maintaining its independent design and common usability across different vehicle types.
Solution Approach 2:
The third output means preliminarily determines the controllable range of the actuator before the second output means calculates target values. This preliminary action ensures that subsequent target value calculations are based on known capability constraints, preventing unrealizable targets.
2Device complexity
If the third output means does not provide capability information to the second output means, then the system structure remains simple, but unrealizable target values are outputted reducing system reliability
Solution Approach 1:
A feedback mechanism is introduced where the third output means provides capability information (controllable ranges) to the second output means. This feedback enables reliable target value generation while maintaining relatively simple system structure by using existing output means components.
3Productivity
If target values are calculated without considering actuator controllable ranges, then the calculation process is faster and simpler, but the probability of outputting unrealizable target values increases
Solution Approach 1:
The controllable range of the actuator is preliminarily determined by the third output means before the second output means calculates target values. This preliminary action allows the calculation process to be both fast and reliable, as the constraints are pre-established and readily available during calculation.
Data Source
AI summary
In a control system mounted in a vehicle, information indicative of a user's desire depending on the signal from at least one of a sensor and user's input device is outputted. A target value of a first state quantity for travel of the vehicle is outputted. The target value is for realizing control of in-vehicle environment in accordance with the user's desire. A command value for controlling an actuator is outputted, where the command value is for realizing the target value. The actuator is controlled based on the command value. A controllable range for the first state quantity is specified depending on a capability of the actuator, and the specified controllable range is outputted for outputting the target value. The target value is calculated such that the target value falls into the controllable range.