多变量时滞过程的扰动观测器控制

IF 3.3 2区 计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS
Xinghan Du , Qi Liu , Wu Cai , Na Geng , Qibing Jin
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引用次数: 0

摘要

作为一种抑制不可测干扰的有效方法,基于干扰观测器(DOB)控制在应用于具有时滞的多变量过程时有两个关键问题需要解决,即标称逆模型的设计和Q(s)滤波器的解析综合。针对上述问题,本文提出了一种基于等效传递函数的多变量时滞过程DOB控制方法。首先,考虑到ETF矩阵与逆模型之间的潜在关系,可以通过计算ETF矩阵来简化逆模型的设计。对ETF矩阵参数的确定方法进行了改进,提高了逆模型的合理性。然后,通过补偿修正后的ETF矩阵,得到一个可实现的逆模型。与使用简单对角逆模型的多变量DOB (MDOB)控制不同,该策略提出了充分考虑过程模型信息的全元素逆模型。由于修正ETF矩阵的计算只涉及几个简单的矩阵运算,因此简化了逆模型的设计。基于改进的逆模型,通过最小化性能指标,即扰动响应的2范数,解析合成Q(s)滤波器。在考虑控制性能和鲁棒性的基础上,确定了Q(s)滤波器的可调参数。仿真结果表明,与其他MDOB控制策略相比,该策略在扰动响应的积分绝对误差(IAE)值、输入的总变化(TV)值和鲁棒性指标方面都具有最佳效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An ETF-based disturbance observer-based control for multivariable processes with time delays
As an effective technique for rejecting unmeasurable disturbances, the disturbance observer-based (DOB) control has two key issues to be addressed when applied to multivariable processes with time delays, i.e., the design of the nominal inverse model and the analytical synthesis of the Q(s) filter. Focusing on the above issues, this paper presents a novel equivalent transfer function-based (ETF-based) DOB control for multivariable processes with time delays. First, considering the potential relation between the ETF matrix and the inverse model, the design of the inverse model can be simplified by calculating the ETF matrix. The method for determining the parameters of the ETF matrix is modified to improve the rationality of the inverse model. Then, a realizable inverse model is achieved by compensating the modified ETF matrix. Unlike the multivariable DOB (MDOB) control using simple diagonal inverse models, the proposed strategy presents a full-element inverse model with full consideration of the process model information. Since the calculation of the modified ETF matrix only involves several simple matrix operations, the design of the inverse model is streamlined. Based on the modified inverse model, the Q(s) filter is synthesized analytically by minimizing the performance index, i.e., the 2-norm of disturbance responses. The adjustable parameters of the Q(s) filter are determined with due consideration of control performance and robustness. Simulation results demonstrate that compared to other MDOB control strategies, the proposed strategy provides the best results in terms of the integral absolute error (IAE) values of the disturbance responses, the total variations (TV) of the inputs, and the robustness indices.
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来源期刊
Journal of Process Control
Journal of Process Control 工程技术-工程:化工
CiteScore
7.00
自引率
11.90%
发文量
159
审稿时长
74 days
期刊介绍: This international journal covers the application of control theory, operations research, computer science and engineering principles to the solution of process control problems. In addition to the traditional chemical processing and manufacturing applications, the scope of process control problems involves a wide range of applications that includes energy processes, nano-technology, systems biology, bio-medical engineering, pharmaceutical processing technology, energy storage and conversion, smart grid, and data analytics among others. Papers on the theory in these areas will also be accepted provided the theoretical contribution is aimed at the application and the development of process control techniques. Topics covered include: • Control applications• Process monitoring• Plant-wide control• Process control systems• Control techniques and algorithms• Process modelling and simulation• Design methods Advanced design methods exclude well established and widely studied traditional design techniques such as PID tuning and its many variants. Applications in fields such as control of automotive engines, machinery and robotics are not deemed suitable unless a clear motivation for the relevance to process control is provided.
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