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MULTI-OBJECTIVE RECONFIGURABLE CONTROLLER DESIGN FOR THREE-TANK SYSTEM USING parametric eigenstructure assignment

CONTROL AND INTELLIGENT SYSTEMS 2011年第1期39卷 12-22页

作者： Sutha, Subbian Thyagarajan, Thangavelu Department of Instrumentation Engineering Madras Institute of Technology Chennai 600044 Tamil Nadu India

The reconfigurable controller (RC) design of strongly interacting multi-input multi-output system is a challenging problem for the designer. In this paper, a parametric right eigenstructure assignment based multiobjective dynamic reconfigurable controller through state feedback is proposed against partial actuator failure for a benchmark three-tank system. The practical aspects of controller design require the conflicting objectives of robust stability to parameter perturbation and smaller controller gain to improve the transient response of the system. These design objectives rise to the minimum condition number of closed-loop eigenvector and minimum norm of feedback controller gain of closed-loop system respectively. Fast and elitist multiobjective genetic algorithm known as nondominated sorting genetic algorithm-II is successfully applied to select the pareto-optimal eigenstructure of closed-loop system. Further, RC has been designed to accommodate partial actuator failure which is considered as loss of control effectiveness in actuators. Added value of this work, the controller uses complex-valued chromosomes. The effectiveness of the proposed controller is illustrated for different actuator fault scenarios through simulation and its performance is analysed.

关键词： parametric eigenstructure assignment reconfigurable controller multiobjective genetic algorithm nondominated sorting genetic algorithm multiobjective dynamic reconfigurable controller

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Abrupt and incipient fault detection and compensation for a 4-tank system benchmark

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TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES 2014年第5期22卷 1287-1297页

作者： Hajiani, Pedram Poshtan, Javad Iran Univ Sci & Technol Tehran Iran

Fault detection and compensation play a key role in enhancing the high demand for performance and security in technological systems. This paper proposes an active fault-tolerant control scheme that detects and compensates for actuator faults in a 4-tank system benchmark. The faults are modeled as a drastic gain loss in actuators (pumps), which could lead to a large loss in the nominal performance. The model-based approach uses a recursive least squares parameter estimation algorithm to form a fault detection and diagnosis subsystem and utilizes a parametric eigenstructure assignment method to reconfigure the state feedback controller. The designed controller is simulated for the nonlinear system, and the results demonstrate promising performance increases in faulty cases in comparison with the nonfault-tolerant controller.

关键词： Active fault-tolerant control systems fault detection and diagnosis online parameter estimation parametric eigenstructure assignment

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parametric design of robust fault isolation observers for linear non-square systems

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SYSTEMS & CONTROL LETTERS 2013年第5期62卷 420-429页

作者： Wahrburg, A. Adamy, J. Tech Univ Darmstadt Inst Automat Control & Mechatron Control Theory & Robot Lab D-64283 Darmstadt Germany

In this article, two different approaches to design fault isolation observers (FIOs) for linear systems are developed. They extend the existing results to arbitrary fault detectability indices and allow to isolate simultaneously occurring actuator and sensor faults by employing only a single, specifically parameterized observer. While the presented parametric eigenstructure assignment approach gives a comprehensive interpretation of the degrees of freedom arising in non-square systems with additional sensors, the time-domain solution proves to be well suited for optimizing disturbance rejection. Furthermore, this paper presents an approach to optimize the robustness of FIOs with respect to disturbances in finite frequency ranges. This enables to reduce conservatism if knowledge of relevant disturbance frequencies is available. (C) 2013 Elsevier B.V. All rights reserved.

关键词： Robust fault isolation Observer-based fault isolation parametric eigenstructure assignment LMI-based optimization Finite frequency ranges

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Robust Fault Detection of Linearized Power GridNetwork System 2

Robust Fault Detection of Linearized Power GridNetwork Syste...

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Power Generation System and Renewable Energy Technologies (PGSRET)

作者： Wahab, Talha Abid, Muhammad Khan, Abdul Qayyum Mustafa, Ghulam PIEAS Dept Syst Engn Islamabad Pakistan

ISBN: (纸本)9781467368131

This research paper is concerned with the robust fault detection of swing dynamics model for power distribution network through fault monitoring observers. Classical nine bus system is used as a test system and it is modeled as a descriptor system for which simple algorithmic approach for robust fault detection is applied using full-order generalized observer based on parametric eigenstructure assignment approach and finally threshold is generated for the residual signal.

关键词： distribution networks eigenstructure assignment fault diagnosis power grids fault monitoring observers full-order generalized observer linearized power grid network system parametric eigenstructure assignment power distribution network residual signal robust fault detection swing dynamics model Fault detection Generators Mathematical model Observers Power grids Power system dynamics Robustness Power grids Defect detection residual signal eigenstructure assignment Power system dynamics dynamos Fault diagnosis Observers Mathematical Model Robustness

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Robust pole assignment via P-D feedback in a class of second-order dynamic systems

Robust pole assignment via P-D feedback in a class of second...

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2004 8th International Conference on Control, Automation, Robotics and Vision (ICARCV), Volume 2

作者： Guo-sheng Wang Guang-ren Duan Department of Control Engineering Academy of Armored Forces Engineering Beijing China Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China

ISBN: (纸本)0780386531

The design of robust pole assignment via proportional-plus-derivative (P-D) feedback is investigated for a class of second-order dynamic systems. Based on P-D feedback parametric eigenstructure assignment for second-order dynamic systems, parametric expressions of the closed-loop eigenvalue sensitivities to the perturbed elements in the open-loop system matrices are derived and an effective algorithm for robust pole assignment in second-order dynamic systems via P-D feedback is proposed. This method utilizes directly the system data of the original second-order dynamic system, and thus is convenient to use in applications. A three lumped mass-spring dashpot system example shows the effect of this proposed algorithm.

关键词： pole assignment PD control eigenstructure assignment closed loop systems open loop systems time-varying systems robust pole assignment PD feedback second-order dynamic system parametric eigenstructure assignment closed-loop eigenvalue sensitivity open-loop system matrices

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