基于史密斯预测器的分数阶控制器设计,可提高不稳定 FOPTD 过程的性能和鲁棒性

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
A. Adithya Kashyap, Suresh Kumar Chiluka, Seshagiri Rao Ambati, G. U. Bhaskar Babu
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引用次数: 0

摘要

性能和鲁棒性是不稳定延时系统应用的基本特征。随着任务变得越来越复杂,传统的控制方法无法满足对性能和鲁棒性的要求。本研究旨在为基于增强型史密斯预测器的不稳定一阶加延时系统(FOPTD)开发基于分数阶的控制器,以提高其性能和鲁棒性。在当前的工作中,使用遗传算法(GA)设计的分数阶控制器具有增强的史密斯预测器(SP)结构,可控制不稳定的一阶延时过程,从而提高性能。此外,在反馈路径中使用了分数阶(FO)滤波器,以进一步提高鲁棒性和性能。根据积分绝对误差(IAE)最小化原则,提出了一种获取最佳分数阶滤波器参数的系统方法。推荐的方法有利于平衡性能和鲁棒性之间的必要权衡。此外,建议的方法通过添加分数阶积分器,提供了调整自由度的灵活性,从而实现稳健的性能。通过模拟文献中的数值示例,分析了推荐控制器的功效。与文献相比,建议的控制器具有更高的性能和鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Smith predictor based fractional order controller design for improved performance and robustness of unstable FOPTD processes
Performance and robustness are essential characteristics for the application of unstable time-delayed systems. As tasks become more complex, traditional control methods cannot meet such demands for performance and robustness. The present work aims to develop fractional order-based controllers for enhanced Smith predictor-based unstable first-order plus time-delayed systems (FOPTD) with improved performance and robustness. In the current work, fractional order controllers using a Genetic Algorithm (GA) are designed with enhanced SP (Smith Predictor) structure to control unstable first-order time-delayed processes to improve performance. Furthermore, in the feedback path a fractional order (FO) filter is used to further improve robustness and performance. A systematic methodology is proposed for obtaining the optimum fractional order filter parameters based on the minimization of Integral Absolute Error (IAE). The recommended approach is beneficial to balance the necessary tradeoff between performance and robustness. Also, the proposed method provides flexibility in tuning the degree of freedom by adding a fractional order integrator, thus leading to robust performance. The efficacy of the recommended controller is analyzed by simulating numerical examples from the literature. The proposed controller provides enhanced performance and robustness compared to the literature.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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