Vehicle Integrated Control With Actuator-Limited Motion Targets
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Solution Overview
Problem
Existing vehicle integrated control devices with multiple posture control actuators do not account for actuator limits, leading to potential impairment of ride comfort and onset of motion sickness.
Innovation Solution
A vehicle integrated control device and method that generates target motion parameters considering actuator limits, optimizing sensitivity indices to improve ride comfort and prevent motion sickness by integrating control of multiple actuators across three axes and rotational directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If target motion parameters are calculated without considering actuator limits, then the target motion state can be theoretically optimized, but the actual generated forces and moments may not be achieved, impairing ride comfort
Solution Approach 1:
The patent applies preliminary action by calculating actuator operation limits in advance based on vehicle posture and motion parameters. The control device determines the maximum and minimum operation amounts for each actuator before generating target motion parameters, ensuring that the optimized targets remain within achievable ranges. This prevents the contradiction by proactively establishing boundaries that guarantee both optimization and reliability.
Solution Approach 2:
The patent changes parameters by dynamically adjusting target motion parameters based on actuator operation limits. When calculated targets exceed actuator capabilities, the system modifies these parameters to fall within achievable ranges while maintaining optimization. This parameter adjustment resolves the contradiction by adapting theoretical targets to practical constraints without sacrificing ride comfort.
2Adaptability or versatility
If multiple posture control actuators are installed, then control flexibility is improved, but the complexity of integrating and coordinating these actuators increases
Solution Approach 1:
The patent merges multiple actuator controls into a unified control framework. By calculating operation limits for all actuators simultaneously and coordinating their operation amounts based on shared constraints, the system integrates control of multiple actuators. This combining approach maintains the flexibility benefits of multiple actuators while reducing the complexity of their coordination through a single integrated control process.
Solution Approach 2:
The patent creates a universal control mechanism that handles multiple actuators through a common methodology. The operation limit calculation and coordination process serves as a multi-functional framework that adapts to different actuator configurations and control scenarios. This universal approach allows the system to manage multiple actuators with varying degrees of freedom without requiring separate control strategies for each, thereby reducing overall complexity.
3Ease of operation
If actuator operation limits are not considered in target value calculation, then calculation simplicity is maintained, but the generated target values may not be achievable, leading to motion sickness
Solution Approach 1:
The patent applies preliminary action by establishing actuator operation limits before target value generation. This preliminary calculation of maximum and minimum operation amounts creates a constraint framework that guides subsequent target value calculations. By having these limits ready in advance, the system maintains calculation simplicity while ensuring all generated targets are achievable, thereby preventing motion sickness without adding significant computational complexity.
Solution Approach 2:
The patent implements feedback by using actuator operation limits to adjust and validate target motion parameters. The control device continuously checks whether calculated targets fall within achievable ranges defined by actuator limits and modifies them accordingly. This feedback mechanism ensures target achievability while maintaining relatively simple calculation processes, preventing the harmful effects of unachievable targets on occupant comfort.
Data Source
AI summary
A vehicle integrated control device improves ride comfort and prevents the onset of motion sickness. The vehicle integrated control device acquires a target momentum of a control axis related to a driving task of the vehicle and generates a first motion parameter and a second motion parameter different from the first motion parameter that is based on the first motion parameter to optimize a sensitivity index. A limit generation unit generates a motion limit amount of the second motion parameter based on the first motion parameter and an operation range of an actuator, a final target generation unit that corrects the second motion parameter based on the motion limit amount, and an operation amount assignment unit that determines an operation amount of an actuator based on the first motion parameter and the second motion parameter corrected by the final target generation unit.