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Model reference adaptive hierarchical control framework for shake table tests

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS 2025年第1期54卷 346-362页

作者： Chen, Zhongwei Yang, T. Y. Xiao, Yifei Pan, Xiao Yang, Wanyan Univ British Columbia Dept Civil Engn Vancouver BC Canada Hong Kong Univ Sci & Technol Dept Civil & Environm Engn Clear Water Bay Hong Kong Peoples R China Harbin Inst Technol Weihai Dept Civil Engn Weihai Shandong Peoples R China

The structural response under earthquake excitation can be simulated by shake table tests. However, the performance of the shake table is affected by the control-Structure Interaction (CSI) effect. In recent years, nonlinear control algorithms were developed to compensate for the CSI effect. In this study, a model reference adaptive control algorithm, named model reference adaptive hierarchical control (MRAHC) framework, is presented. MRAHC consists of a high (adaptive) and low (loop-shaping) level controller. The high-level (adaptive) controller develops the control algorithm on the system level, which directedly considers the inherent nonlinearity of the test specimen and the CSI effect. While the low-level (loop-shaping) controller develops the control algorithm to regulate the hydraulic system and make sure it can follow the reference signal generated by the high-level (adaptive) controller. MRAHC offers many advantages including direct compensation to the structural nonlinearity and the ability to handle the CSI effect. In addition, it allows users to quantify the mass of the test specimens without measurement. To evaluate the performance of the MRAHC method, shake table tests with different upper structure masses were carried out. The performance of the MRAHC was compared with the direct loop-shaping control method (LC) and the Proportional-Integral-Differentiation control method (PID). The results show that the MRAHC can achieve better acceleration tracking compared to the LC and PID control methods. Hence, the MRAHC can be used as an effective nonlinear controller for shake table tests.

关键词： control-structure interaction (CSI) effect mass quantification model reference adaptive hierarchical control (MRAHC) framework nonlinear control algorithm shake table test

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Non-linear control of a boost PFC converter with a small inductor based on feedforward correction and frequency variation

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IET POWER ELECTRONICS 2022年第8期15卷 675-688页

作者： Song, Hongda Liu, Li Yang, Yang Gong, Yimin Zhang, ChenChen Hao, Zhengqiang Hao, Zhengjie Zhang, Jiannan Jilin Univ Coll Phys Changchun 13011 Peoples R China Jilin Univ Coll Commun Engn Changchun Peoples R China

To reduce total harmonic distortion (THD) and improve the power factor (PF) of a boost power factor correction (PFC) converter, here, the authors propose a non-linear control algorithm that includes the feedforward correction (FC) algorithm in the continuous conduction mode (CCM) and the non-linear frequency variation (FV) algorithm in the mixed conduction mode (MCM). The proposed FC algorithm achieves current out of distortion through zero crossing with a lower current loop bandwidth. The proposed non-linear FV algorithm achieves high PF and low THD under minimal load conditions. The non-linear FV algorithm comprises a third harmonic extraction algorithm, a harmonic control loop for reducing THD and a frequency production algorithm. By using this non-linear FV algorithm, the inductor size is reduced, which leads to lower cost and also achieves better THD and PF. The proposed algorithms are verified experimentally in terms of current tracking, current THD, PF, heating and loss on a 2000-W boost PFC converter hardware prototype.

关键词： total harmonic distortion continuous conduction mode PFC converter hardware prototype power factor boost PFC converter nonlinear frequency variation algorithm inductor size frequency production algorithm electric current control nonlinear control systems power convertors harmonic control loop mixed conduction mode nonlinear FV algorithm FC algorithm zero crossing harmonic extraction algorithm power factor correction harmonic distortion feedforward correction algorithm boost power factor correction converter feedforward nonlinear control algorithm

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Recent Advances in Model Predictive and Sliding Mode Current control Techniques of Multiphase Induction Machines

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FRONTIERS IN ENERGY RESEARCH 2021年 9卷

作者： Rodas, Jorge Gonzalez-Prieto, Ignacio Kali, Yassine Saad, Maarouf Doval-Gandoy, Jesus Univ Nacl Asunc Fac Ingn Lab Power & Control Syst LSPyC Luque Paraguay Univ Malaga Dept Elect Engn Malaga Spain Ecole Technol Super Power Elect & Ind Control Res Grp GREPCI Montreal PQ Canada Univ Vigo Appl Power Elect Technol Res Grp APET CINTECX Vigo Spain

Multiphase machines have attracted the attention of the research and industrial communities due to their advantages, namely better power distribution and fault-tolerant capabilities without extra hardware. However, the multiphase machine requires high-performance control strategies to take advantage of these features. From this perspective, the field-oriented control with the inner current control loop that uses using an explicit modulation stage has been considered the benchmark solution thanks to the reduced harmonic distortion obtained with this regulation strategy. Nevertheless, nonlinear controllers, thanks to their inherent nature, allow exploiting the extra multiphase capabilities in a simplified manner. Consequently, this paper aims to concentrate and discuss the latest developments on nonlinear current control of two of the most popular multiphase electric drive configurations, five-phase and six-phase. Then, this paper covers mainly finite-control-set model predictive control and their variations. Moreover, sliding-mode control is also explained. Finally, this paper includes experimental assessments of the most recent nonlinear current control techniques considering steady-state and transient conditions, stability and performance analysis.

关键词： multiphase induction machine current control and AC drives nonlinear control algorithm model predictive control sliding mode control

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Proportional-type non-linear excitation controller with power angle reference estimator for single-machine infinite-bus power system

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IET GENERATION TRANSMISSION & DISTRIBUTION 2019年第18期13卷 4029-4036页

作者： Kim, Seok-Kyoon Hanbat Natl Univ Dept Creat Convergence Engn Daejeon 34158 South Korea

This study suggests a non-linear control algorithm for the exciter controlling a single-machine infinite-bus system, considering the non-linear dynamics with parameter and sudden input power variations. This study provides three contributions: (i) an estimation algorithm is designed to estimate the power angle operating point for the terminal voltage to be regulated to its desired value, incorporating the disturbance observer (DOB);(ii) a DOB-based proportional-type non-linear stabilising algorithm is systematically derived using the estimated power angle operating point;and (iii) it is rigorously shown that the proposed proportional-type non-linear controller always removes the steady-state errors without integral actions for error variables. The simulation results confirm the effectiveness of the proposed technique under several transmission line fault scenarios.

关键词： power system stability power system control power transmission faults stability observers nonlinear control systems control system synthesis sudden input power variations estimation algorithm DOB-based proportional-type nonlinear stabilising algorithm estimated power angle operating point proportional-type nonlinear controller proportional-type nonlinear excitation controller power angle reference estimator infinite-bus power system nonlinear control algorithm single-machine infinite-bus system nonlinear dynamics

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Laser dot projection videogrammetry for vibration measurement and control of a piezoelectric flexible cantilever plate

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AEROSPACE SCIENCE AND TECHNOLOGY 2019年 94卷 105397-000页

作者： Qiu, Zhi-cheng Wang, Tao-xian South China Univ Technol Sch Mech & Automot Engn Guangzhou 510641 Guangdong Peoples R China

A novel full-field non-contact vibration measurement method is investigated for a piezoelectric flexible cantilever plate, using laser dot-projection videogrammetry. Several laser dots are projected as marks for visual system. The three-dimensional coordinates of each mark are monitored by a binocular stereo vision system, composed of two cameras. After image processing, the vibration signal of the first bending mode is obtained. For the first torsional mode, two laser displacement sensors are utilized to detect the vibration. To suppress the residual vibration quickly, an adaptive nonlinear controller and a fuzzy tuning nonlinear controller are designed and adopted. To verify the investigated measurement and control methods, experiments are conducted by using a piezoelectric flexible cantilever plate experimental platform. The experimental results demonstrate that the investigated laser dot projection measurement method is effective for first bending vibration detection. Furthermore, compared with PD control, the adopted nonlinear algorithms have better damping performance, especially for small amplitude residual vibration. (C) 2019 Elsevier Masson SAS. All rights reserved.

关键词： Laser dot projection Videogrammetry Vibration measurement Piezoelectric flexible plate nonlinear control algorithm

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Vibration control of two-connected piezoelectric flexible plate using nonlinear algorithm and T-S fuzzy controller

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JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 2015年第2期26卷 219-243页

作者： Qiu, Zhi-cheng Ling, De-fang Zhang, Xian-min Han, Jian-da S China Univ Technol Sch Mech & Automot Engn Guangzhou 510641 Guangdong Peoples R China Chinese Acad Sci Shenyang Inst Automat State Key Lab Robot Shenyang 110016 Peoples R China

This article focuses on the active vibration control of a kind of two-connected piezoelectric flexible plate. A finite element model of the connected plate integrated with distributed piezoelectric sensors and actuators is derived, including bending and torsional vibrations. In this model, two connected hinges are simplified as regular plate elements to facilitate the system. A modified optimization method based on the energy dissipation rate is used for the optimal placement of piezoelectric sensors and actuators. The bending and torsional vibrations of the two-connected plate can be decoupled on measurement and driving control, due to the appropriate placement of the lead zirconate titanate sensors and actuators. The proportional and derivative control, the proposed nonlinear controller, and T-S fuzzy control algorithms are applied to suppress the bending and torsional vibrations of the two-connected plate. The numerical simulation and experimental results demonstrate that the last two control algorithms can suppress the low-order bending and torsional vibration more effectively than that of the designed proportional and derivative control algorithm.

关键词： Connected flexible plate bending vibration torsional vibration active vibration control piezoelectric sensors actuators optimal placement nonlinear control algorithm T-S fuzzy control

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Comparing Combinations of Linear and nonlinear Feedback Terms for Motion control of Marine Surface Vessels

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IFAC-PapersOnLine 2016年第23期49卷 303-310页

作者： Nørgaard Sørensen, Mikkel Eske Breivik, Morten TrondheimNO-7491 Norway

nonlinear control algorithms are often designed with linear feedback terms. Such linear feedback typically gives rise to nice exponential stability properties, but are not physically realistic since all actuators have magnitude constraints. One way to address such constraints can be to introduce nonlinear feedback terms. Hence, this paper investigates combinations of linear and nonlinear feedback terms for pose and velocity control of marine surface vessels. Three cascaded controllers are developed and compared through three simulation scenarios and one model-scale experiment. The comparisons are made using performance metrics which consider both control accuracy and energy use. © 2016

关键词： nonlinear feedback Feedback control Stability Target tracking Cascaded controls control accuracy Energy use Linear feedback Marine surface vessels Model scale experiments nonlinear control algorithm Performance metrics

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Geometric path following control in a moving frame

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IFAC-PapersOnLine 2015年第11 11期48卷 150-155页

作者： Wang, Jian Kapitaniuk, Iurii A. Chepinskiy, Sergey A. Liu, Dongliang Krasnov, Aleksandr J. Hangzhou Dianzi University School of Automation Xiasha Higher Education Zone Hangzhou Zhejiang Province310018 China University of Groningen Nijenborgh 4 AG Groningen9747 Netherlands ITMO University 49 Kronverkski prospekt Saint-Petersburg197101 Russia

The paper describes an approach to the development of the geometric path following control for a dynamical model of the rigid body with unidirectional thrust. The popular example of such system is the dynamical model of the quadcopter. Desired path of movement in the space is represented by an intersection of two implicit surfaces. In this paper we assume that the desired path is attached to a movable frame. This is a natural extension of the classical approaches for stationary frames. Path following control problem is posed as a problem of maintaining the holonomic relationships between the system outputs. control is synthesized using the differential geometrical method through nonlinear transformation of initial dynamic model. The main results presented are the model of spatial motion and relevant nonlinear control algorithms. © 2015

关键词： Mathematical transformations Geometry Motion control nonlinear systems Classical approach Coordinates transformation Geometrical methods Moving path Non linear transformations nonlinear control algorithm Path following control Set stabilization

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Acceleration sensors based modal identification and active vibration control of flexible smart cantilever plate

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AEROSPACE SCIENCE AND TECHNOLOGY 2009年第6期13卷 277-290页

作者： Qiu, Zhi-cheng Wu, Hong-xin Ye, Chun-de S China Univ Technol Sch Mech & Automot Engn Guangzhou 510641 Peoples R China Beijing Inst Control Engn Beijing 100080 Peoples R China

Some flexible appendages of spacecrafts, such as solar panels, are cantilever plate structures. Thus, vibration problem is unavoidable when there is slewing maneuver or external disturbance excitation. Vibration of such cantilever plate structures includes coupled bending and torsional motion. Furthermore, the low amplitude vibration near the equilibrium point is very difficult to be quickly suppressed due to nonlinear factors of the hardware in the system, which is harmful to stability and attitude control accuracy. To solve these problems, acceleration sensor-based modal identification and active vibration control methods are presented for the first two bending and the first two torsional modes vibration of the cantilever plate. Optimal placements of three acceleration sensors and PZT patches actuators are performed to decouple the bending and torsional vibration of such cantilever plate for sensing and actuating, and identifications are achieved by experiments. A nonlinear control method is presented to suppress both high and low amplitude vibrations of flexible smart cantilever plate significantly. Experimental comparison researches are conducted by using acceleration proportional feedback and the presented nonlinear control algorithms. The experimental results demonstrate that the presented acceleration sensor-based methods can suppress the vibration of cantilever plate effectively. (C) 2009 Elsevier Masson SAS. All rights reserved.

关键词： Piezoelectric cantilever plate Active vibration control Acceleration feedback nonlinear control algorithm Experiment

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A nonlinear PI(D) controlLER

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CANADIAN JOURNAL OF CHEMICAL ENGINEERING 1989年第3期67卷 485-493页

作者： JUTAN, A Department of Chemical and Biochemical Engineering Faculty of Engineering Science The University of Western Ontario London Canada N6A 5B9

The PID control algorithm remains the most widely used in the process industries. This is due to its simplicity (three tuning parameters, fixed structure) and its ability to satisfy the majority of process control needs. Here, a new nonlinear algorithm (the PI(D)) is presented, which maintains the simplicity of the PID, but is nevertheless able to outperform it in both load and set point changes. Tuning formulae and response curves for the PI(D) controller are presented.

关键词： PI(D) controller controller tuning tuning nonlinear control algorithm

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