检索结果-内蒙古大学图书馆

structured IQC Synthesis of Robust H 2 controllers in the Frequency Domain

IFAC-PapersOnLine 2023年第2期56卷 10408-10413页

作者： Maximilian Schütte Annika Eichler Herbert Werner Deutsches Elektronen-Synchrotron DESY Germany Institute of Control Systems Technical University Hamburg Germany

The problem of robust controller synthesis for plants affected by structured uncertainty, captured by integral quadratic constraints, is discussed. The solution is optimized towards a worst-case white noise rejection specification, which is a generalization of the standard H 2 -norm to the robust setting including possibly non-LTI uncertainty. Arbitrary structural constraints can be imposed on the control solution, making this method suitable for distributed systems. The nonsmooth optimization algorithm used to solve the robust synthesis problem operates directly in the frequency domain, eliminating scalability issues for complex systems and providing local optimality certificates. The method is evaluated using a literature example and a real-world system using a novel implementation of a robust H 2 -performance bound.

关键词： Distributed robust controller synthesis Numerical methods for optimal control controller constraints and structure Complex systems H2-performance IQCs

来源：评论

学校读者我要写书评

暂无评论

structured H-infinity design for the LISA mission accelerometer mode

引用

IFAC-PapersOnLine 2023年第2期56卷 9124-9129页

作者： D. Navarro-Tapia A. Marcos Technology for Aerospace Control (TASC) Martock United Kingdom Universidad Carlos III de Madrid (UC3M) Madrid Spain

This article presents the application of the structured H ∞ control approach to the design of the LISA mission accelerometer mode. This joint ESA/NASA mission will be the first space-based gravitational wave observatory and is characterized by very stringent scientific constraints resulting in unprecedented control challenges in terms of precision, accuracy, and complexity. The results presented in here were the first demonstration step performed within an ESA study tasked with surveying, trading-off, and applying advanced control techniques to LISA. In addition to showing the methodological gains and design capabilities of the structured H ∞ approach, the effects of hardware changes as well as control switching were also analyzed for the designed controllers providing good insight on the way forward to reduce the associated transients. The results presented in this article laid the groundwork, and design process, to subsequently design and validate the full LISA accelerometer mode.

关键词： Robust control Space exploration controller constraints and structure

来源：评论

学校读者我要写书评

暂无评论

Gain-Scheduled Control of LPV Systems with Structural constraints

引用

IFAC-PapersOnLine 2023年第2期56卷 4272-4277页

作者： Paolo R. Massenio Gianluca Rizzello Massimo Tipaldi David Naso Electrical and Information Engineering Department Polytechnic University of Bari 70126 Bari Italy Systems Engineering Department Saarland University Saarbrücken 66123 Germany

In large-scale dynamic systems, consisting of the interconnection of several subsystems, the control law must obey a certain distributed structure defined by the information exchange pattern on a communication network. In case the system exhibits parameters which vary over time, the Linear Parameter Varying (LPV) paradigm provides a control-oriented framework for the design of robust or gain-scheduled control laws. Since each subsystem has only access to a partial knowledge of the overall set of parameters, due to the constraint imposed by the communication network, the controller gain must satisfy some structural constraints which increase the complexity of the design problem. This paper proposes a novel approach based on Linear Matrix Inequalities (LMIs) to deal with the distributed control of large-scale systems described by a LPV dynamics. LMI conditions are established for the design of a gain-scheduled controller ensuring exponential stability of the overall system with a prescribed decay rate, while satisfying the structural constraints imposed by the communication network. A simulation case study is presented to show the effectiveness of the proposed approach.

关键词： controller constraints and structure Decentralized and distributed control Gain-scheduling control Linear matrix inequalities Linear parameter-varying systems

来源：评论

学校读者我要写书评

暂无评论

Synthesis of fixed-structure H ∞ controllers via Constrained Particle Swarm Optimization

引用

IFAC Proceedings Volumes 2008年第2期41卷 7843-7848页

作者： Ichiro Maruta Tae-Hyoung Kim Toshiharu Sugie Department of Systems Science Kyoto University Uji Kyoto 611-0011 Japan CREST Japan Science and Technology Agency 4-1-8 Honcho Kawaguchi-shi Saitama 332-0012 Japan

This paper provides a design method of fixed-structure robust controllers satisfying multiple H ∞ norm specifications by using a sort of randomized algorithms. First, a new tool to perform general constrained optimization is developed which does not need any gradient or derivative of the objective function. This tool is based on PSO (particle swarm optimization), which attracts a lot of attention recently in the evolutionary computation area due to its empirical evidence of its superiority in solving various non-convex problems. Second, it is shown how to design a fixed-structure controller satisfying given multiple H ∞ specifications by using the developed optimization tool. Third, its effectiveness is evaluated through various numerical examples, because it is difficult to guarantee the performance of the proposed method theoretically due to a probabilistic nature of the PSO. The simulation results demonstrate its effectiveness clearly.

关键词： Optimization based controller synthesis Robust controller synthesis controller constraints and structure Parametric optimization Evolutionary algorithms Probabilistic robustness

来源：评论

学校读者我要写书评

暂无评论

Design Approach for Hard Disk Drive Settle Performance Optimization

引用

IFAC Proceedings Volumes 2008年第2期41卷 1791-1796页

作者： Julian H. Stoev Ho Seong Lee Samsung Electronics 443-742 Maetan-3Dong Yeongtong-Gu Suwon-City Gyeonggi-Do Korea (Tel: +82-31-200-8707 Samsung Electronics 443-742 Maetan-3Dong Yeongtong-Gu Suwon-City Gyeonggi-Do Korea (Tel: +82-31-200-8380

A design approach is presented for constrained optimization of feed-forward signal using closed loop impulse response. The approach is flexible and is possible to integrate easily with the existing controller structur... 详细信息

关键词： Parametric optimization controller constraints and structure Industrial applications of optimal control

来源：评论

学校读者我要写书评

暂无评论

Design of the Impulsive Goodwin's Oscillator in 1-cycle

引用

IFAC-PapersOnLine 2023年第2期56卷 6660-6665页

作者： Alexander Medvedev Anton V. Proskurnikov Zhanybai T. Zhusubaliyev Information Technology Uppsala University SE-752 37 Uppsala Sweden the Department of Electronics and Telecommunications Politecnico di Torino Turin Italy 10129 Zhanybai T. Zhusubaliyev is with the Department of Computer Science International scientific Laboratory for Dynamics of Non-Smooth Systems Southwest State University Kursk Russia

This paper presents a systematic approach to design a hybrid oscillator that admits an orbitally stable periodic solution of a certain type with pre-defined parameters. The parsimonious structure of the Impulsive Goodwin's oscillator (IGO) is selected for the implementation due to its well-researched rich nonlinear dynamics. The IGO is a feedback interconnection of a positive third-order continuous-time LTI system and a nonlinear frequency and amplitude impulsive modulator. A design algorithm based on solving a bilinear matrix inequality is proposed yielding the slope values of the modulation functions that guarantee stability of the fixed point defining the designed periodic solution. Further, assuming Hill function parameterizaton of the pulse-modulated feedback, the parameters of those rendering the desired stationary properties are calculated. The character of perturbed solutions in vicinity of the fixed point is controlled through localization of the multipliers. The proposed design approach is illustrated by a numerical example. Bifurcation analysis of the resulting oscillator is performed to explore the nonlinear phenomena in vicinity of the designed dynamics.

关键词： Hybrid and switched systems modeling Event-based control Control in systems biology controller constraints and structure Application of nonlinear analysis and design

来源：评论

学校读者我要写书评

暂无评论

Relations Between Control Signal Properties and Robustness Measures

引用

IFAC Proceedings Volumes 2008年第2期41卷 8713-8718页

作者： Per-Ola Larsson Tore Hägglund Department of Automatic Control Lund University Box 118 SE-211 00 Lund Sweden

In this paper we consider control signal properties, such as maximum magnitude and activity, as well as system robustness measures. We derive an ideal controller and control signal for exponential disturbance rejection for a first order process with time delay. For the resulting closed-loop system, it is shown analytically that there are strong interconnections between robustness measures and control signal properties regarding load disturbance attenuation. The results imply that popular controller design methods implicitly take control signal properties into consideration.

关键词： controller constraints and structure disturbance rejection constrained control robust time-delay systems robustness analysis

来源：评论

学校读者我要写书评

暂无评论

A non-iterative approach to Linear Quadratic Static Output Feedback

引用

IFAC-PapersOnLine 2023年第2期56卷 9540-9545页

作者： Hadriano Morales Escamilla Paul Trodden Visakan Kadirkamanathan Department of Automatic Control and Systems Engineering ACSE The University of Sheffield Sheffield UK

This paper considers the problem of static output feedback (SOF) synthesis for linear time-invariant (LTI) systems. Static output feedback, and more generally structured controller synthesis, is of special interest to any industrial application where a reduced-order controller is desired, e.g., high-order systems, or a specific structure is to be imposed, i.e., distributed/decentralised control. A simple two-step process is proposed, solving one Riccati equation and one optimisation problem with linear matrix inequality (LMI) constraints, enabled via a dilation using the distance to the full-state feedback optimum gain. Numerical analysis shows considerable computational savings, with negligible differences in the performance, when compared to current iterative methods.

关键词： Output feedback control controller constraints and structure Linear multivariable systems Linear matrix inequalities Optimal Control Static controller synthesis S-procedure

来源：评论

学校读者我要写书评

暂无评论

Necessary and Sufficient Conditions for Perfect Command Following and Disturbance Rejection in Fractional Order Systems

引用

IFAC Proceedings Volumes 2008年第2期41卷 364-369页

作者： Masoud Karimi-Ghartemani Farshad Merrikh-Bayat Sharif University of Technology Azadi Street Tehran Iran (Tel: +98-21-66009110 Sharif University of Technology Azadi Street Tehran Iran (Tel: +98-21-66165982

The aim of this paper is to present a modified explanation of the classic internal model principle for certain class of finite-dimensional, time-invariant, deterministic fractional-order systems commonly known as fractional systems of commensurate order. The necessary and sufficient conditions for perfect command tracking and disturbance rejection are provided. The difficulty of applying the classic internal model principle to fractional-order systems is due to the difference between integer-order and fractional-order systems from the zero-pole cancellation point of view. The notion of zero-pole cancellation is discussed for the systems under consideration in a well posed mathematical framework. It is also shown that fractional elements can be used for command tracking and disturbance rejection purposes which provides more flexibility for controller design applications. Two illustrative examples confirm the applicability of the proposed theorems.

关键词： Fractional systems controller constraints and structure Analytic design Internal model principle

来源：评论

学校读者我要写书评

暂无评论

A study on Prediction Requirements in time-domain Control of Wave Energy Converters

引用

IFAC Proceedings Volumes 2010年第20期43卷 372-377页

作者： Francesco Fusco Jean-Cristophe Gilloteaux John Ringwood Electronic Engineering Department National University of Ireland Maynooth Ireland

Wave energy converters (WECs) based on oscillating bodies or oscillating water columns would earn huge benefits from a time-domain control on a wave by wave basis. Such a control would allow efficient energy extraction over a wider range of frequencies than what could possibly be achieved when no real-time control is adopted, thus increasing the economical attractiveness of the WECs. Almost every control strategy that showed some potential, however, suffers from the problem that future knowledge of the incident wave elevation, or wave excitation force, is required. In this paper a general control framework for oscillating WECs is presented and a methodology to understand and quantify the wave excitation force prediction requirements, along with the achievable prediction accuracy, is discussed. The two features are compared against each other and linked to the dynamic characteristics of a device. Along with the qualitative discussion, the methodology is applied to some heaving cylinders when reactive control and linear passive control are applied, under different sea conditions.

关键词： Wave energy controller constraints and structure time series forecasting

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：