Approximation-Free Control for Vehicle Active Suspensions With Hydraulic Actuator

This paper presents a novel control strategy for nonlinear uncertain vehicle active suspension systems without using any function approximators [e.g., neural networks (NNs) or fuzzy logic systems (FLSs)]. Unlike previous results that neglect the effect of actuator dynamics, this paper incorporates t...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2018-09, Vol.65 (9), p.7258-7267
Main Authors: Huang, Yingbo, Na, Jing, Wu, Xing, Gao, Guanbin
Format: Article
Language:English
Subjects:
Active control
Active suspension control
Approximation
approximation-free control (AFC)
Artificial neural networks
Computer simulation
Control systems design
Dynamics
Fuzzy logic
Fuzzy systems
Hydraulic actuators
Hydraulic equipment
Hydraulics
Mathematical analysis
Neural networks
Nonlinear control
prescribed performance
Steady-state
Suspension systems
Suspensions
Transient analysis
vehicle suspension systems
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Summary:This paper presents a novel control strategy for nonlinear uncertain vehicle active suspension systems without using any function approximators [e.g., neural networks (NNs) or fuzzy logic systems (FLSs)]. Unlike previous results that neglect the effect of actuator dynamics, this paper incorporates the dynamics of a hydraulic actuator that is used to create the required active suspension forces into the controller design. To address the nonlinearities of this hydraulic system, an approximation-free control method is introduced. In this method, the widely used NNs and FLSs are not needed. This leads to reduced computational burden and complexity, and thus, it is more suited for practical applications. Moreover, by introducing a prescribed performance function and the associated error transform, the proposed controller can guarantee both the transient and steady-state suspension responses. The stability of the closed-loop system and the suspension performance requirements are rigorously proved. Finally, comparative simulations are conducted to validate the improved performance and robustness of the proposed method.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2018.2798564