A robust disturbance reduction scheme for linear small delay systems with disturbances of unknown frequencies

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題名:	A robust disturbance reduction scheme for linear small delay systems with disturbances of unknown frequencies
作者:	董必正;Tsai, Ming-Hau;Tung, Pi-Cheng
貢獻者:	工學院機械工程學系
關鍵詞:	Applied sciences;Approximation;Artificial neural network;Computer science;control theory;systems;Control theory. Systems;Delay;Disturbance observer;Disturbance reduction;Disturbances;Exact sciences and technology;Learning theory;Mathematical models;Modelling and identification;Modified Smith predictor;Neural networks;Reduction;System theory;Time delay;Uncertainty
日期:	2012-01-01
上傳時間:	2026-04-23 14:40:00 (UTC+8)
出版者:	ISA - Instrumentation, Systems, and Automation Society;Kidlington: Elsevier Ltd
摘要:	摘要： A robust disturbance reduction scheme for linear small delay systems with disturbances of unknown frequencies is presented in this paper. Unlike other methods, the proposed scheme does not require disturbance frequencies to be known. The linear systems modeled in this study are nominally stable and minimum phase systems with relative degree. The control structure is an integration of Astrom’s modified Smith predictor and the proposed scheme. The proposed scheme consists of an input disturbance reduction controller (IDRC) and a residual disturbance reduction controller (RDRC). The IDRC using an artificial neural network (ANN) is proposed to reduce unknown load disturbances and modeling uncertainties in stable systems and unstable systems. The ANN can appropriately approximate the product of an inverse time delay and a nonnegative gain in the IDRC. The residual signals including residual disturbances and residual uncertainties are suppressed by the RDRC based on a disturbance observer. Simulation examples are illustrated to show the effectiveness of the proposed robust disturbance reduction scheme for linear delay uncertain systems with periodic or non-periodic unknown load disturbances. ► A disturbance reduction scheme is proposed for small delay systems. ► Disturbance frequencies are not required for the proposed scheme. ► Uncertainties and disturbances are effectively reduced by the proposed scheme. ► The proposed scheme effectively reduces the influence of residual signals. 其他題名： ISA Trans 出版者： Kidlington: Elsevier Ltd 出版日期： 2012-05-01 出處： ISA transactions, 2012-05, Vol.51 (3), p.362-372 版權： 2011 ISA 版權： 2015 INIST-CNRS 版權： Copyright © 2011 ISA. Published by Elsevier Ltd. All rights reserved. 識別號： ISSN: 0019-0578 識別號： ISSN: 1879-2022 識別號： EISSN: 1879-2022 識別號： DOI: 10.1016/j.isatra.2011.12.002 識別號： PMID: 22226304
顯示於類別:	[機械工程學系] 期刊論文

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