Design of Virtual Reference Feedforward Controller for an Active Suspension System

This paper presents a method to design a virtual reference feedforward controller (VRFC) for an active suspension system. Generally, it is not easy to apply a feedforward control to an active suspension system because a reference or disturbance is difficult to measure or estimate. Instead of measuri...

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Bibliographic Details
Published in:IEEE access 2022, Vol.10, p.1-1
Main Authors: Jeong, Yonghwan, Sohn, Youngil, Chang, Sehyun, Yim, Seongjin
Format: Article
Language:English
Subjects:
2-DOF quarter-car model
Active control
Active suspension control
Control systems
Feedback control
Feedforward control
Feedforward systems
Force
Heuristic methods
Laser radar
Linear programming
Linear quadratic regulator
LQ SOF control
LQR
Optimization
Output feedback
Passenger comfort
Roads
Simulation
Springs
Suspension systems
Suspensions (mechanical systems)
virtual reference feedforward control (VRFC)
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Summary:This paper presents a method to design a virtual reference feedforward controller (VRFC) for an active suspension system. Generally, it is not easy to apply a feedforward control to an active suspension system because a reference or disturbance is difficult to measure or estimate. Instead of measuring references or disturbances, a virtual reference on heave motion of a sprung mass representing a bump is defined and used for feedforward control in this paper. Feedforward controller with the virtual reference is combined with feedback controllers such as linear quadratic regulator (LQR) and linear quadratic (LQ) static output feedback (SOF) controller. To fully take advantages of the virtual reference for an active suspension system, it is necessary to find optimal parameters of the virtual reference which maximizes control performance. For the purpose, a simulation-based optimization is formulated and solved by a heuristic optimization method. A simulation with a simulation package shows that the proposed VRFC is quite effective in improving the ride comfort with an active suspension system.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2022.3184417