Vehicle Damping Control Using Road Amplitude-Based Delay Prediction
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Solution Overview
Problem
Existing damping control devices for vehicles face challenges in accurately predicting the operation delay period, leading to potential failures in generating the target control force at the predicted passing position, which can result in inadequate reduction of vehicle body vibrations caused by road surface conditions.
Innovation Solution
A damping control device that acquires road surface displacement related values and calculates an amplitude index to determine an accurate operation delay period, allowing the control force generating device to generate the target control force at the appropriate timing, thereby reducing vehicle body vibrations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a constant operation delay period is preset in the damping control device, then the device structure is simple and easy to operate, but the control force generating device cannot generate the target control force at the appropriate timing when the wheel passes through the predicted passing position
Solution Approach 1:
The operation delay period is changed from a fixed constant value to a dynamically variable parameter that is determined based on the amplitude of road surface displacements. The controller adjusts the operation delay period according to the detected amplitude, allowing the system to adapt to different road conditions and ensure accurate timing for control force generation.
Solution Approach 2:
The operation delay period parameter is modified based on the amplitude of road surface displacements. By changing this parameter dynamically according to the detected amplitude, the system achieves more accurate timing for control force generation while maintaining operational simplicity through automated adjustment.
2Device complexity
If the operation delay period is set to a constant value, then the device complexity is low, but the accuracy of predicting the operation delay period is insufficient
Solution Approach 1:
The mechanical approach of using a fixed constant value for the operation delay period is replaced with a computational method. The controller calculates and determines the operation delay period based on the detected amplitude of road surface displacements, substituting a simple mechanical setting with an intelligent computational determination that achieves higher prediction accuracy without significantly increasing device complexity.
3Device complexity
If the damping control device uses a preset constant operation delay period, then the control system is simple, but the target control force cannot be generated at the correct timing, resulting in inadequate vibration reduction
Solution Approach 1:
The control system dynamically adjusts the operation delay period based on the detected amplitude of road surface displacements. This dynamic adjustment ensures that the control force is generated at the correct timing for effective vibration reduction, transforming the system from a static constant-value approach to an adaptive dynamic approach.
Solution Approach 2:
The controller detects the amplitude of road surface displacements and uses this feedback information to determine the appropriate operation delay period. This feedback mechanism ensures that the operation delay period is continuously optimized based on actual road conditions, enabling accurate timing for control force generation and effective vibration reduction.
Data Source
AI summary
A damping control device includes a control force generating device and a controller. The controller is configured to acquire road surface displacement related values related to a plurality of road surface displacements in a predetermined sampling zone, acquire an amplitude index indicating a magnitude of an amplitude of the sampled values, determine an operation delay period of the control force generating device based on the magnitude of the amplitude indicated by the amplitude index, calculate target control force for reducing vibration of a vehicle body based on the road surface displacement related values at a predicted passing position where a wheel is predicted to pass after an elapse of the operation delay period from a current time, and transmit, to the control force generating device, a control command for causing the control force generating device to regulate the control force to agree with the target control force.