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Research Papers

Robust Control of Automotive Active Seat-Suspension System Subject to Actuator Saturation

[+] Author and Article Information
Zhou Gu

College of Mechanical and
Electronic Engineering,
Nanjing Forestry University,
Nanjing 210037, China;
School of Automation,
Southeast University,
Nanjing 210018, China
e-mail: gzh1808@163.com

Shumin Fei

School of Automation,
Southeast University,
Nanjing 210018, China

Yaqin Zhao

College of Mechanical and
Electronic Engineering,
Nanjing Forestry University,
Nanjing 210037, China

Engang Tian

School of Electrical and Automation Engineering, Nanjing Normal Southeast University,
Nanjing 210042, China

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received December 26, 2012; final manuscript received November 5, 2013; published online April 28, 2014. Assoc. Editor: Srinivasa M. Salapaka.

J. Dyn. Sys., Meas., Control 136(4), 041022 (Apr 28, 2014) (7 pages) Paper No: DS-12-1432; doi: 10.1115/1.4026833 History: Received December 26, 2012; Revised November 05, 2013

This paper deals with the problem of robust sampled-data control for an automotive seat-suspension system subject to control input saturation. By using the nature of the sector nonlinearity, a sampled-data based control input saturation in the control design is studied. A passenger dynamic behavior is considered in the modeling of seat-suspension system, which makes the model more precisely and brings about uncertainties as well in the developed model. Robust output feedback control strategy is adopted since some state variables, such as, body acceleration and body deflection, are unavailable. The desired controller can be achieved by solving the corresponding linear matrix inequalities (LMIs). Finally, a design example has been given to demonstrate the effectiveness and advantages of the proposed controller design approach.

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References

Figures

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Fig. 1

Vibration model of seat-suspension system

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Fig. 5

Suspension deflection under case a

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Fig. 6

Tyre deflection under case a

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Fig. 3

Body acceleration under case a

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Fig. 4

Control force under case a

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Fig. 7

Body acceleration under case b

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Fig. 8

Suspension deflection under case b

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Fig. 9

Tyre deflection under case b

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Fig. 10

Body acceleration under case c

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Fig. 11

Suspension deflection under case c

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