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Indexed by:Journal Papers

Date of Publication:2020-03-10

Journal:INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL

Included Journals:EI、SCIE

Volume:30

Issue:4

Page Number:1679-1695

ISSN No.:1049-8923

Key Words:disturbances; dynamic output quantization; extended state estimator; switched systems

Abstract:This paper studies the problem of quantized output feedback stabilization for a disturbed discrete-time switched system. With the quantized output measurement, an extended state current estimator is constructed to estimate the state and disturbance. In the presence of switches and disturbances, the design of quantization scheme becomes a big challenge to avoid the quantizer saturation and guarantee the control precision. In this setup, the well-applied time-triggered method to design the update policy of dynamic quantization parameter is hard to implement. We solve the above problem by proposing a novel event-triggered update policy of quantization parameter, by which the quantizer update is adaptive to the switching signal and the bound of disturbance difference. Consequently, the quantizer saturation is avoided and, combined with the designed dwell-time switching law, the system state can converge to the origin. The proposed method is illustrated by a numerical example.