APPLICATION OF MIMO CONTROL ALGORITHM FOR ACTIVE  SUSPENSION SYSTEM. CASE STUDY: USING A NEW MODEL WITH 5 STATE  VARIABLES

Manh Long  Nguyen; Thi Thu Huong Tran; Tuan Anh Nguyen; Ngoc Duyen Dang; Ngoc Duyen  Dang

doi:10.1590/1679-78256992

APPLICATION OF MIMO CONTROL ALGORITHM FOR ACTIVE SUSPENSION SYSTEM. CASE STUDY: USING A NEW MODEL WITH 5 STATE VARIABLES

Authors

Manh Long Nguyen Faculty of Vehicle and Energy Engineering, Phenikaa University, Nguyen Van Trac, Ha Dong, Hanoi, Vietnam https://orcid.org/0000-0002-6562-7328
Thi Thu Huong Tran a Faculty of Vehicle and Energy Engineering, Phenikaa University, Nguyen Van Trac, Ha Dong, Hanoi, Vietnam https://orcid.org/0000-0001-7035-4283
Tuan Anh Nguyen Automotive Engineering Department, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam. https://orcid.org/0000-0002-6064-2262
Ngoc Duyen Dang Automotive Engineering Department, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam https://orcid.org/0000-0002-5319-5222
Ngoc Duyen Dang bAutomotive Engineering Department, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam https://orcid.org/0000-0003-3057-8535

DOI:

https://doi.org/10.1590/1679-78256992

Abstract

This paper introduces the LQR control algorithm for the active suspension system. Because the model of the vehicle dynamics used in this paper includes a hydraulic actuator, therefore, this model will include five state variables. Besides, the process of linearization of the hydraulic actuator is also shown in this paper. This is a completely novel and original method. It is possible to describe almost all the characteristics of hydraulic actuators with just one linear differential equation. Also, the parameters of the LQR controller are optimized through the in-loop optimization algorithm. The results of the research showed that the values of displacement and acceleration of the sprung mass were significantly reduced when this algorithm was used. In the investigation cases, these values usually do not exceed 2.68% and 43.00% compared to the situation of the vehicle using only a passive suspension system. Therefore, ride comfort and stability can be enhanced in many driving conditions when the active suspension system with the LQR control algorithm is used.

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Published

2022-02-21

Issue

Vol. 19 No. 2 (2022)

Section

Articles

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