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Static and Dynamic Control of Smart Composite Laminates

AIAA JOURNAL 2014年第9期52卷 1896-1914页

作者： Khandelwal, Ravi Prakash Chakrabarti, Anupam Bhargava, Pradeep Indian Inst Technol Dept Civil Engn Roorkee 247667 Uttar Pradesh India

An efficient C-0 continuous two-dimensional finite-element model has been presented in this paper for the control of laminated composite and sandwich plates embedded/surface-bonded with piezoelectric layers and subjected to mechanical loading as well as electric potential. The problem of modeling of smart laminates involves the coupling between mechanical and electrical fields. The structural component is modeled by an efficient equivalent single-layer plate theory, which ensures interlaminar shear-stress continuity and zero transverse shear-stress conditions at the top and bottom of the plate surfaces. Moreover, this theory contains unknowns defined at the reference plane (i.e., midplane) only. The electric field is modeled using layerwise theory, which contains the unknowns at each layer interfaces. The proposed combine model, which may be called a refined hybrid plate model, is implemented to analyze the coupled problem of piezoelectricity in laminated composites and sandwich plates.

关键词： Smart Composite Laminates Generalized Finite Element Method Transverse Shear Electric Potential Fiber Reinforced Composites Plate Theory distributed parameter system Material Properties Vibration Suppression Control Algorithm

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A boundary control for motion synchronization of a two-manipulator system with a flexible beam

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AUTOMATICA 2014年第12期50卷 3088-3099页

作者： Dou, Haibin Wang, Shaoping Beihang Univ Sch Automat Sci & Elect Engn Beijing 100191 Peoples R China Sci & Technol Aircraft Control Lab Beijing 100191 Peoples R China

A novel synchronization motion control method is proposed in this paper for the system in which two manipulators are constrained by a flexible beam. Different from the general synchronization control method, the coupling dynamics among various actuators is considered as the shear force, which results from the synchronization errors. Then a simple boundary control is introduced to realize the synchronization motion of actuators by suppressing the shear force. In order to avoid the drawbacks of assumed modes model, the dynamic model of flexible beam is described by a distributed parameter model in this paper. A Riesz basis method is used to prove that the proposed control law can guarantee the synchronization system to be exponential stability. Simulation results demonstrate that the proposed method can effectively improve the performance of synchronization motion compared with other methods. (C) 2014 Elsevier Ltd. All rights reserved.

关键词： Motion synchronization Coupling dynamics Boundary control distributed parameter system Riesz basis

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Robust adaptive control of a thruster assisted position mooring system

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AUTOMATICA 2014年第7期50卷 1843-1851页

作者： He, Wei Zhang, Shuang Ge, Shuzhi Sam Univ Elect Sci & Technol China Inst Robot Chengdu 611731 Peoples R China Univ Elect Sci & Technol China Sch Automat Engn Chengdu 611731 Peoples R China Univ Elect Sci & Technol China Sch Aeronaut & Astronaut Chengdu 611731 Peoples R China Univ Elect Sci & Technol China Sch Engn & Comp Sci Chengdu 611731 Peoples R China Natl Univ Singapore Dept Elect & Comp Engn Singapore 117576 Singapore

In this paper, robust adaptive control is developed for a thruster assisted position mooring system in the transverse direction. To provide an accurate and concise representation for the dynamic behavior of the mooring system, the flexible mooring lines are modeled as a distributed parameter system of partial differential equations (PDEs). The proposed control is applied at the top boundary of the mooring lines for station keeping via Lyapunov's direct method. Adaptive control is designed to handle the system parametric uncertainties. With the proposed robust adaptive control, uniform boundedness of the system under the ocean current disturbance is achieved. The proposed control is implementable with actual instrumentations since all the signals in the control can be measured by sensors or calculated by using a backward difference algorithm. The effectiveness of the proposed control is verified by numerical simulations. (C) 2014 Elsevier Ltd. All rights reserved.

关键词： distributed parameter system Flexible structure Boundary control Vibration control Marine mooring system

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THE INTERNAL MODEL PRINCIPLE FOR systemS WITH UNBOUNDED CONTROL AND OBSERVATION

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SIAM JOURNAL ON CONTROL AND OPTIMIZATION 2014年第6期52卷 3967-4000页

作者： Paunonen, Lassi Pohjolainen, Seppo Tampere Univ Technol Dept Math FIN-33101 Tampere Finland

In this paper the theory of robust output regulation of distributed parameter systems with infinite-dimensional exosystems is extended for plants with unbounded control and observation. As the main result, we present the internal model principle for linear infinite-dimensional systems with unbounded input and output operators. We do this for two different definitions of an internal model found in the literature, namely, the p-copy internal model and the G-conditions. We also introduce a new way of defining an internal model for infinite-dimensional systems. The theoretic results are illustrated with an example where we consider robust output tracking for a one-dimensional heat equation with boundary control and pointwise measurements.

关键词： robust output regulation distributed parameter system internal model principle

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The Role of Exosystems in Output Regulation

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IEEE TRANSACTIONS ON AUTOMATIC CONTROL 2014年第8期59卷 2301-2305页

作者： Paunonen, Lassi Tampere Univ Technol Dept Math FIN-33101 Tampere Finland

In this technical note we study the role of the exosystem in the theory of output regulation for linear infinite-dimensional systems. The main result of this technical note shows that a stabilizing autonomous controller that achieves output tracking of an almost periodic reference signal is also capable of tracking any signal generated by a full exosystem. Moreover, given an almost periodic reference signal, we present a method for constructing a minimal exosystem generating this signal.

关键词： distributed parameter system feedback control output regulation

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Three-layer in-plane dynamical track model for metro applications

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PERIODICA POLYTECHNICA-CIVIL ENGINEERING 2014年第4期58卷 335-338页

作者： Zoller, Vinos Zobory, Istvan Obuda Univ Sandor Rejto Fac Light Ind & Environm Protect Eng H-1034 Budapest Hungary Budapest Univ Technol & Econ Fac Transportat Engn & Vehicle Engn Dept Railway Vehicles & Vehicle Syst Anal H-1111 Budapest Hungary

In the study a linear dynamical model suitable for metro-applications is constructed and analysed in the framework of the Winkler-foundation theory. The metro track is allocated within the inner space of the tube of big diameter The tube is considered as a beam on elastic and damped foundation. The track itself consists also of two elastically supported beams, namely the basement beam made of steel-reinforced concrete is situated at the bottom of the tube and connected to the lower-inner surface of the tube by an elastic and dissipative "carpet-pad". The concrete beam supports the rails through an elastic and dissipative layer The wheel loads acting on the rails are moving horizontally along the track. The set of partial differential equations describing the vertical motion of the three-layer dynamical system is composed and the method of solution in the case of travelling wheel loads is elaborated.

关键词： railway track model distributed parameter system vehicle dynamics motion equations motion responses

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Robust Adaptive Model Tracking for distributed parameter Control of Linear Infinite-dimensional systems in Hilbert Space

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IEEE/CAA Journal of Automatica Sinica 2014年第3期1卷 294-301页

作者： Mark J.Balas Susan A.Frost the Embry-Riddle Aeronautical University the NASA Ames Research Center

This paper is focused on adaptively controlling a linear infinite-dimensional system to track a finite-dimensional reference *** a linear continuous-time infinite-dimensional plant on a Hilbert space with disturbances of known waveform but unknown amplitude and phase,we show that there exists a stabilizing direct model reference adaptive control law with the properties of certain disturbance rejection and *** plant is described by a closed,densely defined linear operator that generates a continuous semigroup of bounded operators on the Hilbert space of *** central result will show that all errors will converge to a prescribed neighborhood of zero in an infinitedimensional Hilbert *** result will not require the use of the standard Barbalat’s lemma which requires certain signals to be uniformly *** result is used to determine conditions under which a linear infinite-dimensional system can be directly adaptively controlled to follow a reference *** particular,we examine conditions for a set of ideal trajectories to exist for the tracking *** results are applied to adaptive control of general linear diffusion systems described by self-adjoint operators with compact resolvent.

关键词： Adaptation models Adaptive control Hilbert space Learning (artificial intelligence) Robustness Trajectory adaptive control algorithm adaptive theory distributed parameter system distributed parameter systems Hilbert space trajectory Adaptation models reference model adaptive control Robustness Computer algorithms

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MODEL PREDICTIVE CONTROL FOR NONLINEAR distributed parameter systemS BASED ON LS-SVM

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ASIAN JOURNAL OF CONTROL 2013年第5期15卷 1407-1416页

作者： Ai, Ling San, Ye Harbin Inst Technol Control & Simulat Ctr Harbin 150086 Peoples R China

This paper presents a novel model predictive control configuration for nonlinear distributed parameter systems based on least squares support vector machine. First, a data-based modeling methodology for an unknown nonlinear distributed parameter system is introduced. Subsequently, the model predictive control framework based on the aforementioned model is presented at the measured point. To verify the effectiveness and feasibility of the control arithmetic, simulation results from a tubular reactor with the controller designed by the presented procedure are given.

关键词： distributed parameter system Karhunen-Loeve expansion least squares support vector machine model predictive control tubular reactor

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Multi-variable fuzzy logic control for a class of distributed parameter systems

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JOURNAL OF PROCESS CONTROL 2013年第3期23卷 351-358页

作者： Ren, Yao-Qing Duan, Xiao-Gang Li, Han-Xiong Chen, C. L. Philip Cent S Univ State Key Lab High Performance Complex Mfg Changsha 410083 Peoples R China City Univ Hong Kong Dept Syst Engn & Engn Management Hong Kong Hong Kong Peoples R China Univ Macau Fac Sci & Technol Taipa Macau Peoples R China

A multi-variable fuzzy logic controller (FLC) is proposed to control a class of distributed parameter systems (DPSs). When a DPS is transformed into finite-dimensional ordinary differential equations (ODES) by using time/space separation, each ODE can be considered as a subsystem. According to design strategy of conventional FLC, one FLC should be designed for one subsystem. It will be very complex because there are many subsystems. In order to reduce design complexity, only a MF and a rule base are designed in the controller. For other subsystems or ODEs, their MFs can be designed equivalently by introducing scaling factors. Then, the proposed FLC has ability to control multi-variable processes. At last, the proposed FLC is applied to control a rod catalytic reaction process. The simulation results demonstrate the effectiveness of the proposed fuzzy control strategy. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： Fuzzy logic controller Multi-variable distributed parameter system Time/space separation

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A Simple distributed parameter Analytical Model of Multi-Layer Piezoelectric Actuators 8

A Simple Distributed Parameter Analytical Model of Multi-Lay...

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Asia Modelling Symposium 2014 8th International Conference Mathematical Modelling Computer Simulation

作者： Zhang, Yangkun Lu, Tien-Fu Univ Adelaide Sch Mech Engn Adelaide SA Australia

ISBN: (纸本)9781479964871

Multi-layer piezoelectric actuators (PEAs) are commonly to produce extremely small displacements. Dynamic modeling of PEAs, which can be used to analyze or predict their frequency/time-domain behaviors, plays important roles in the design and control of PEA-based mechanisms. This paper provides a rationale that the complex electrical-mechanical coupled behaviors of PEA can be modelled as an equivalent simple solid with two equivalent excitation forces (proportional to the excitation voltage of PEA) that are equal and opposite, acting at two ends of PEA. Such a rationale is demonstrated through the mathematical derivation process, based on the IEEE standard constitutive relations of piezoelectricity. From the derivation process, the underlying assumptions for the equivalent model to be effective are revealed and the relevant constants in equivalent models are correlated to the standard IEEE piezoelectric material properties. The identified underlying assumptions can provide a guideline for designs to use this simple PEA model. The identified correlation between the constants in equivalent models and the standard IEEE piezoelectric materials allows an alternative way to obtain the equivalent constants, if it is not available for experiments to determine them.

关键词： multi-layer piezoelectric actuator distributed parameter system uniform-electrical-field assumption simple analytical model

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