What is it about?
Suspension system has an important role on improving ride comfort and road-handling ability of a car. Semi-active suspension can achieve desirable performance and consume much less power than active suspension. However, semi-active suspension systems with MR dampers have complex structures and nonlinear characteristics varying with changes of external conditions and identification parameters, so that it would be beneficial to industrial processes to estimate the complex non-linear dynamics in real time instead of obtaining an accurate mathematical model. In this paper, a novel idea processing the complex non-linear dynamics of suspension systems is proposed based on linear extended state observer technology, and a linear active disturbance rejection control method is presented.
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Why is it important?
The proposed method can estimate equivalently online the complex non-linear input–output inverse dynamic of the MR damper so as to avoid the zero-crossing of the control coefficient of the inverse MR damper during the design of controller, which is more beneficial to the implementation of the designed control strategy in practice. And the simulation validation indicates that the idea processing the complex non-linear dynamic is reasonable and the designed strategy can further improve the ride comfort and road-handling ability of the car.
Perspectives
I hope this paper would really bring kind of interesting to people concerning the field of vehicle dynamics control. Because it gives a practical method to processing the complex nonlinear dynamic and uncertainty of the controlled system, it can also offer the reference for control design of other industrial systems.
Xiaohong Jiao
Yanshan University
Read the Original
This page is a summary of: Modified active disturbance rejection control for non-linear semi-active vehicle suspension with magneto-rheological damper, Transactions of the Institute of Measurement and Control, May 2017, SAGE Publications,
DOI: 10.1177/0142331217707363.
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