Chassis Control for Combined Pitching Rolling Lifting
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Solution Overview
Problem
Existing motor vehicle chassis systems are limited to single-degree-of-freedom movements, restricting simultaneous execution of pitching, rolling, and lifting movements, which hampers the ability to compensate for uneven road surfaces and improve dynamic properties during cornering.
Innovation Solution
A control device determines alignment information to activate actuators for combined pitching, rolling, and lifting movements, allowing the chassis to move in multiple degrees of freedom, thereby compensating for longitudinal and lateral forces acting on vehicle occupants and enhancing driving comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If actuators are activated for single-degree-of-freedom movements (pitching, rolling, or lifting separately), then the chassis can perform controlled movements, but the ability to simultaneously execute combined movements is limited
Solution Approach 1:
The patent combines multiple single-degree-of-freedom actuators (pitching, rolling, and lifting actuators) into a coordinated system that executes combined movements simultaneously. The control device merges the control signals for all actuators and calculates coordinated movement commands that enable the chassis to perform complex three-degree-of-freedom movements as an integrated function, thereby enhancing adaptability without proportionally increasing device complexity.
Solution Approach 2:
The control device is designed with multi-functionality to handle various movement combinations. It can selectively activate different actuator combinations based on driving conditions, road surface variations, and cornering requirements, making the system universally applicable to multiple scenarios (pitching compensation, rolling compensation, lifting adjustments, and their combinations) with a single integrated control unit.
2Reliability
If the chassis is limited to single-degree-of-freedom movements, then the control system remains simple, but the ability to compensate for uneven road surfaces and improve dynamic properties during cornering is hampered
Solution Approach 1:
The system dynamically adjusts chassis alignment by actively coordinating multiple actuators in real-time based on sensed driving conditions. The control device continuously calculates optimal actuator commands to achieve desired pitching, rolling, and lifting movements, enabling the chassis to adapt dynamically to varying road conditions, cornering forces, and occupancy scenarios, thereby improving reliability and comfort through dynamic control.
3Ease of operation
If combined pitching, rolling, and lifting movements are executed simultaneously, then driving comfort is enhanced, but the control and coordination requirements increase
Solution Approach 1:
The control device implements feedback mechanisms by continuously monitoring actual chassis alignment and actuator positions, comparing them with target alignment information, and adjusting actuator commands accordingly. This closed-loop control ensures accurate execution of combined movements while automatically compensating for deviations, thereby maintaining driving comfort without requiring excessively complex manual coordination.
Data Source
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Figure 4~5
AI summary
The invention relates to a motor vehicle (1), comprising a plurality of actuators (5) for carrying out movements of the chassis (2), wherein the motor vehicle (1) comprises a control device (6) for detecting orientation information describing an orientation of the chassis (2) to be undertaken with regard to at least one target setting, wherein the control device (6) is designed to control the actuators (5) on the basis of the orientation information in such a way that the actuators (5) carry out in a combined manner pitching, rolling and lifting movements of the chassis (2) in order to orient the chassis corresponding to the orientation described by the orientation information.