Active Suspension Damper Rigidity Control for Variable Driving Conditions
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Solution Overview
Problem
Traditional passive suspensions in vehicles have fixed coil spring rigidity, damping values, and bushing rigidity that fail to meet stability requirements under varying driving conditions.
Innovation Solution
An active suspension control method that adjusts damper rigidity based on real-time vehicle driving conditions, using sensors to determine conditions like accelerator pedal change rate, transverse acceleration, and road information to optimize suspension performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional passive suspension with fixed rigidity is used, then the structure is simple and reliable, but the vehicle cannot maintain stability under different driving conditions
Solution Approach 1:
The patent applies dynamics by transforming the fixed rigidity passive suspension into an active suspension system with dynamically adjustable rigidity. The control system continuously monitors driving conditions (acceleration, deceleration, turning, road surface) and adjusts the damper rigidity in real-time to match the current operating state, enabling the suspension to adapt to varying driving conditions while maintaining system manageability through structured control logic.
Solution Approach 2:
The patent implements parameter changes by modifying the rigidity parameter of the suspension damper based on detected driving conditions. The control system changes the rigidity parameter dynamically - increasing rigidity during acceleration/deceleration/turning to reduce body movement, and decreasing rigidity on smooth roads for comfort - thus resolving the contradiction between adaptability and complexity through controlled parameter variation.
2Reliability
If fixed damping values are used in passive suspension, then the system is simple to control, but vehicle stability cannot be ensured under varying working conditions
Solution Approach 1:
The patent applies feedback by implementing a closed-loop control system that continuously monitors driving conditions (accelerator pedal position, brake pedal position, steering angle, vehicle acceleration) and uses this feedback to adjust the damper rigidity. The control system receives feedback from sensors, processes the information to determine current driving state, and adjusts suspension parameters accordingly, ensuring vehicle stability while maintaining controllable complexity through systematic feedback processing.
3Adaptability or versatility
If active suspension with adjustable rigidity is implemented, then vehicle stability under different conditions is improved, but the control system becomes more complex
Solution Approach 1:
The patent resolves the contradiction between adaptability and ease of operation by implementing dynamic rigidity adjustment through automated control. The system dynamically adapts to different driving conditions (comfort mode, sport mode, road conditions) without requiring manual intervention, making the complex adaptation process transparent to the user while maintaining operational simplicity through automatic mode selection and execution.
Data Source
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AI summary
A control method and system for an active suspension, and a vehicle, which relate to the technical field of vehicle control. The control method for an active suspension comprises: acquiring traveling state data of a vehicle; determining a driving condition of the vehicle according to the traveling state data; and controlling a damper of an active suspension according to a rigidity requirement corresponding to the driving condition of the vehicle.