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Research Papers

Discrete-Time Sliding-Mode Switching Control Scheme With Disturbance Observer and Its Application to Superheated Steam Temperature Systems

[+] Author and Article Information
Lei Yu

School of Mechanical and Electric Engineering,
Soochow University,
Suzhou, China;
Key Laboratory of System Control and
Information Processing,
Ministry of Education,
Shanghai, China
e-mail: yu_lei@suda.edu.cn

Chun Zhang

School of Computer Science and Technology,
Nanjing University of Posts
and Telecommunications,
Jiangsu, China
e-mail: zhc1088@njupt.edu.cn

Jun Huang

School of Mechanical and Electric Engineering,
Soochow University,
Suzhou, China

Shumin Fei

Key Laboratory of Measurement
and Control of Complex Systems of Engineering,
Ministry of Education,
Nanjing, China

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received November 23, 2015; final manuscript received May 2, 2016; published online June 8, 2016. Assoc. Editor: Heikki Handroos.

J. Dyn. Sys., Meas., Control 138(10), 101003 (Jun 08, 2016) (8 pages) Paper No: DS-15-1584; doi: 10.1115/1.4033557 History: Received November 23, 2015; Revised May 02, 2016

In this paper, we have addressed a sliding-mode switching control scheme with disturbance observer for a class of single-input single-output (SISO) discrete switched nonlinear systems which suffer from uncertain parameters. To overcome the influences, the external disturbances, and uncertainty, an application of the boiler steam temperature control systems has been modeled as the control plant, and a disturbance compensator observer from the sliding-mode dynamics has been proposed to enhance robustness and decrease the system chattering. With the presented control scheme, using the feedback linearizable method and average dwell time technique, the closed-loop switching system is stable such that the output tracking error converges to a small neighborhood nearby zero and the sliding-mode surface can be well obtained. Experimental results of the superheated steam temperature systems have developed the better performance of the proposed control scheme over traditional sliding control strategy, which have demonstrated good accuracy of tracking error performance.

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Figures

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Fig. 1

Boiler steam temperature system model structure

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Fig. 2

Identification of boiler steam temperature system

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Fig. 3

Output tracking performance with disturbance observer method

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Fig. 4

Tracking error performance with disturbance observer method

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Fig. 5

Control input with disturbance observer method

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Fig. 6

Switching law with average dwell-time

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Fig. 7

Tracking control performance without disturbance observer method

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Fig. 8

Tracking error performance without disturbance observer method

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Fig. 9

Control input without disturbance observer method

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