Title: Graphical design for stability of linear active disturbance rejection control to first order time delay plants

Authors: Ruiguang Yang; Mingwei Sun; Zengqiang Chen

Addresses: Department of Automation, Nankai University, Tianjin 300071, China ' Department of Automation, Nankai University, Tianjin 300071, China ' Department of Automation, Nankai University, Tianjin 300071, China

Abstract: In this paper, a Linear Active Disturbance Rejection Control (LADRC) scheme is presented for the uncertain first order delay time plant. The stable boundary is obtained, which make the tuning process very easy. The controller can be applied to a plant with large time delay. The uncertainty of the system is characterised by the Kharitonov theorem and the gain-phase margin tester approach, combined with the D-partition method, is utilised to determine specific performance boundaries. The analysis is conducted graphically and the feasible regions are explicitly shown in the parameter plane. Numerical simulation is provided to demonstrate the effectiveness of the proposed controller.

Keywords: LADRC; linear active disturbance rejection control; first order delay time plants; stability boundaries; graphical design; gain phase margin tester; controller tuning; uncertainty; numerical simulation.

DOI: 10.1504/IJSCIP.2012.050471

International Journal of System Control and Information Processing, 2012 Vol.1 No.1, pp.118 - 130

Available online: 18 Nov 2012 *

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