Disturbance Rejection For Magnetic Leviation Suspension System

2016 ◽  
pp. 223-240
Keyword(s):  
Disturbance Rejection ◽  
Suspension System

Fuzzy sliding mode based active disturbance rejection control for active suspension system

2019 ◽  
Vol 234 (2-3) ◽  
pp. 449-457
Author(s):  
Haoping Wang ◽  
Yeqing Lu ◽  
Yang Tian ◽  
Nicolai Christov
Keyword(s):  
Disturbance Rejection ◽  
Ride Comfort ◽  
Actuator Saturation ◽  
Sliding Mode ◽  
Suspension System ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Car Suspension ◽  
Disturbance Rejection Control ◽  
Fuzzy Sliding Mode

This article deals with the control problem of 7-degrees of freedom full-car suspension system which takes into account the spring-damper nonlinearities, unmodeled dynamics and external disturbances. The existing active disturbance rejection control uses an extended state observer to estimate the “total disturbance” and eliminate it with state error feedback. In this article, a new type of active disturbance rejection control is developed to improve the ride comfort of full car suspension systems taking into account the suspension nonlinearities and actuator saturation. The proposed controller combines active disturbance rejection control and fuzzy sliding mode control and is called Fuzzy Sliding Mode active disturbance rejection control. To validate the system mathematical model and analyze the controller performance, a virtual prototype is built in Adams. The simulation results demonstrate better performance of Fuzzy Sliding Mode active disturbance rejection control compared to the existing active disturbance rejection control.

Motion-based active disturbance rejection control for a non-linear full-car suspension system

2017 ◽  
Vol 232 (5) ◽  
pp. 616-631 ◽  
Author(s):  
Panshuo Li ◽  
James Lam ◽  
Kie Chung Cheung
Keyword(s):  
Disturbance Rejection ◽  
Control Method ◽  
Reference Signal ◽  
Suspension System ◽  
Ride Quality ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Car Suspension ◽  
Disturbance Rejection Control ◽  
Non Linear

This paper investigates the vibration attenuation problem of a non-linear full-car suspension system and aims to stabilize the vehicle attitude to provide a good ride quality. First, with respect to heave motion, pitch motion and roll motion, the full-car suspension system is separated into three interconnected subsystems. For each subsystem, corresponding motion-based controllers are designed to attenuate the vibrations of the sprung mass. A non-linear tracking differentiator is used to track the reference signal and to obtain its derivative. An extended state observer is established to estimate the total disturbance, which includes all the uncertainties and the external disturbance. Based on the principle of active disturbance rejection control, proportional–derivative and fuzzy proportional–derivative controllers are designed to control the resulting linear system with total disturbance compensation. Finally, four actuator forces are computed online using the three motion-based controllers obtained. Simulations are carried out in different road conditions; the results illustrate the merits of the proposed control method.

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