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adaptive input estimation method and fuzzy robust controller combined for active cantilever beam structural system vibration control

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JOURNAL OF VIBROENGINEERING 2013年第3期15卷 1230-1242页

作者： Lee, Ming-Hui Chinese Mil Acad Dept Civil Engn Kaohsiung Taiwan

This paper studies the active vibration control of a cantilever beam structural system by combining the adaptive input estimation method with the fuzzy robust controller. The unknown inputs can be estimated using the measurement dynamic displacement of a beam structural system. That is to say, the adaptive input estimation method can estimate the dynamic inputs of every step time on-line, while the active component applies the same magnitude inverse force into the feedback control. The simulation results show that the proposed synthesis control system has disturbance compensation capability. It can suppress the vibration in a disturbance structural system more effectively and promote controller performance.

关键词： adaptive input estimation method fuzzy robust controller active control

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adaptive input estimation method combining finite element scheme for inverse jet flow heat flux estimating

Chung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute ...

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Chung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute of Technology 2006年第2期34卷 21-32页

作者： Chen, Tai-Sheng Jang, Horng-Yuan Chen, Tsung-Chien Tuan, Pan-Chio Department of System Engineering Chung Cheng Institute of Technology National Defense University Taiwan Department of Computer Science and Information Engineering Nan Kai Institute of Technology Taiwan

A missile launch will produce a high temperature jet flow, the high temperature jet flow effects on the design and prime cost for fireproof decking is considered. This work presents an on-line inverse method based on the adaptive input estimation method that combines the finite element scheme to estimate unknown jet flow heat flux. The temperature is measured using a thermocouple at the outer surface of a steel plate. The input estimator develops a recursive relation between the observed residual sequence value with unknown heat flux and a theoretical residual sequence to improve the state estimate accuracy and avoid the divergence problem. A recursive least square estimator is derived that uses the residual innovation sequence to compute the magnitude of the unknown jet flow heat flux. The superior capabilities of the proposed method are analyzed and demonstrated using several typical cases with time varying jet flow heat flux input. The results show that the proposed method has the advantages of stability and good accuracy.

关键词： adaptive input estimation method Finite element scheme Jet flow heat flux

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Inverse active wind load inputs estimation of the multilayer shearing stress structure

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WIND AND STRUCTURES 2008年第1期11卷 19-33页

作者： Chen, Tsung-Chien Lee, Ming-Hui Natl Def Univ Chung Cheng Inst Technol Dept Power Vehicle & Syst Engn Tao Yuan 33509 Taiwan

This research investigates the adaptive input estimation method applied to the multilayer shearing stress structure. This method is to estimate the values of wind load inputs by analyzing the active reaction of the system. The Kalman filter without the input term and the adaptive weighted recursive least square estimator are two main portions of this method. The innovation vector can be produced by the Kalman filter, and be applied to the adaptive weighted recursive least square estimator to estimate the wind load input over time. This combined method can effectively estimate the wind loads to the structure system to enhance the reliability of the system active performance analysis. The forms of the simulated inputs (loads) in this paper include the periodic sinusoidal wave, the decaying exponent, the random combination of the sinusoidal wave and the decaying exponent, etc. The active reaction computed plus the simulation error is regard as the simulated measurement and is applied to the input estimation algorithm to implement the numerical simulation of the inverse input estimation process. The availability and the precision of the input estimation method proposed in this research can be verified by comparing the actual value and the one obtained by numerical simulation.

关键词： adaptive input estimation method shearing stress structure wind load Kalman filter

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