Active Chassis Actuator Control via Skyhook and Anticipated Variables
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for actively controlling the chassis of a motor vehicle do not effectively address uneven road surfaces, as they lack a comprehensive approach to combine sensor data for proactive adjustment of actuator variables, leading to inefficient compensation of road unevenness and inadequate suspension reinforcement.
Innovation Solution
A method and system that combine skyhook and soft-spring variables with an anticipated variable, derived from road height profiles and vehicle kinematics, to provide a manipulated variable for actuators, enabling proactive control of the vehicle's movement behavior by adjusting the suspension and damping in response to road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only skyhook variable is used for actuator control, then vehicle body movement is controlled, but road unevenness compensation is insufficient
Solution Approach 1:
The patent combines multiple control variables (skyhook variable, soft-spring variable, and anticipated variable) into a unified manipulated variable for actuator control. This merging approach integrates different control strategies to achieve both body movement control and road unevenness compensation simultaneously, resolving the contradiction between compensation effectiveness and control complexity.
Solution Approach 2:
The anticipated variable is calculated in advance based on predicted road conditions before the vehicle actually encounters the unevenness. This preliminary action allows the actuator to be pre-positioned or pre-adjusted, improving road unevenness compensation effectiveness while maintaining manageable control complexity through predictive rather than reactive control.
2Adaptability or versatility
If sensor data for height profile is processed, then proactive suspension adjustment is enabled, but measurement and detection complexity increases
Solution Approach 1:
The system calculates an anticipated variable based on predicted height profile data before the vehicle encounters the actual road condition. This preliminary calculation enables proactive suspension adjustment by preparing the control system in advance, reducing the real-time measurement and detection burden while maintaining high adaptability to road conditions.
3Reliability
If combination of multiple variables is used, then compensation effectiveness is improved, but control system complexity increases
Solution Approach 1:
The patent merges skyhook variable, soft-spring variable, and anticipated variable into a single manipulated variable that drives the actuator. This consolidation approach maintains compensation effectiveness by integrating multiple control strategies while avoiding excessive complexity by forming one unified control signal rather than managing multiple independent control paths.
Data Source
AI summary
The invention relates to a method for providing a manipulated variable for an actuator (4) of an active chassis of a motor vehicle (2), wherein the manipulated variable in the event that a value for a projected variable, which is dependent upon a height profile of the terrain to be travelled by the motor vehicle (2), is available, is configured from a combination of a Skyhook variable, which is dependent upon a movement of a structure of the motor vehicle (2), and the projected variable, and wherein the manipulated variable is configured from a combination of a soft-spring variable, which is dependent upon a wheel-suspension of the motor vehicle (2), and the Skyhook variable, if no value for the projected variable is available.