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Torque controller design for electrical load simulator with estimation and compensation of parametric uncertainty

Torque controller design for electrical load simulator with ...

引用

International Bhurban Conference on Applied sciences & Technology, IBCAST

作者： Nasim Ullah Shaoping Wang School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

This paper proposes adaptive robust controller for electrical load simulator with estimation of parameters uncertainties and updating the model parameters to minimize model error Fuzzy logic is used to estimate the total disturbance which is function of extra torque and mechanical parameters variation. Estimation algorithm for parameters variation is derived from voltage and torque balance equations of electrical load simulator with suitable adaptive learning rate. A robust torque controller is derived from torque state equation of electrical load simulator and its stability is guaranteed using Lyapunov stability analysis. The validity of proposed controller is verified using computer simulations.

关键词： Actuators Torque Adaptation models Art Parameter estimation Atmospheric modeling

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Influence of aerodynamic load on aerocraft actuator and research on Special Loading with Hydraulic Load Simulator

Influence of aerodynamic load on aerocraft actuator and rese...

引用

International Conference on Automatic control and Artificial Intelligence (ACAI 2012)

作者： Yaoxing Shang Hang Yuan Zongxia Jiao Nan Yao Science and Technology on Aerocraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University Beijing China

ISBN: (纸本)9781627481205

This paper focuses on influence of aerodynamic load on aerocraft actuator, then proposes a new concept of Special Load to evaluate the ultimate performance of actuator, and explores how to process the Special Load simulation with Hydraulic Load Simulator (HLS). To test actuator stability and load stiffness, conventional methods generally use several specific loads for simulation and test considering both cases with no load and elasticity load. In general, if the system is stable without load, it will remain stable after loading. The elasticity load test is taken to measure the load stiffness of the system. Furthermore, theoretical and practical methods are insufficient to proceed the research of how authentic aerodynamic load influences actuator. Practical test experiences indicate that although the actuator passes the loading test with spring, some aerodynamic load profile will still make the actuator controller unstable in the real case. Based on the analysis of aerodynamic load, particularity of inertia, viscosity and elasticity load, a correlation model can be built aerodynamic load and state variables of actuator control system. In this paper, we attempt to replace aerodynamic load with a combination of some special loads as the Equivalent Special Load. In order to reproduce the influence on actuator of aerodynamic load with Equivalent Special Load, potential methods applying HLS are explored. Moreover, conducting the analysis of dissimilarities of special and conventional loading, as well as stability analysis, help put forward the requirements of controller for special loading.

关键词： Aerocraft Actuator Aerodynamic Load Load simulator

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Output regulation for switched linear systems with different coordinate transformations

Output regulation for switched linear systems with different...

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2012 UKACC International Conference on control, control 2012

作者： Dong, Xiao Xiao Sun, Xi Ming Zhao, Jun Dimirovski, Georgi M. State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang 110819 China School of Control Science and Engineering Dalian University of Technology Dalian 116024 China School of Engineering Dogus University Istanbul TR-34722 Turkey School FEEIT SS Cyril and Methodius University Skopje MK-1000 Macedonia

ISBN: (纸本)9781467315609

This paper addresses the output regulation problem for switched linear systems. When each regulation equation has their own solution, we give a sufficient condition for the output regulation problem to be solvable. Firstly, we give the regulation equations of switched linear systems and the relation of the transformed states between two consecutive switching times. Secondly, the existence of a minimal average dwell-time for every switching sequence is assumed, and by virtue of an appropriate Lyapunov analysis, the output regulation is achieved. Our result is of much less conservativeness. © 2012 IEEE.

关键词： Linear systems

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Smooth trajectory planning for manipulator of cotton harvesting machinery based on quaternion and B-spline

Smooth trajectory planning for manipulator of cotton harvest...

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2012 International Symposium on Instrumentation and Measurement, Sensor Network and automation, IMSNA 2012

作者： Wang, Mulan Li, Xiaoxia Xu, Kaiyun Jiang, Rong Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing China Department of Electrical and Mechanical Engineering Jiangsu Food Science College Huaian China School of Automation Nanjing Institute of Technology Nanjing China School of Mechanical Engineering Nanjing Institute of Technology Nanjing China

ISBN: (纸本)9781467324670

A planning method for manipulator of cotton harvesting machinery is proposed to accomplish smooth orientation adjustment in its task space. Quaternion is adopted to represent the orientation instead of the traditional homogeneous transformation matrix, and the corresponding conversion process is deduced. The smooth orientation trajectory is generated by interpolating key orientations with the quaternion three-dimensional spherical interpolation method. Key joint positions are solved with the inverse kinematics algorithm according to discrete orientations sampled with specific positioning accuracy of the manipulator terminal, and then smooth joint trajectories with stable start-stop motion and continuous jerk are obtained through the interpolation method based on five degrees B-spline. Simulation results show that, the proposed trajectory planning method supplied manipulators with smooth adjustment of orientation and stable movement of joints, which made it an effective solution for the smooth orientation planning problem of manipulators in the cotton harvesting machinery. © 2012 IEEE.

关键词： Manipulators

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Non-negative matrix factorization based on double sparsity K-SVD

Non-negative matrix factorization based on double sparsity K...

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第三届数字制造与自动化国际会议

作者： Zheng Hong Li Zhen Li Zhao School of Automation Science and Electrical Engineering Beihang University Science and Technology on Electro-Optical Information Security Control Laboratory

This paper presents a novel non-negative matrix factorization algorithm based on double sparsity K-SVD. It keeps the good parts-based representation. And meanwhile it has a well sparsity as sparse coding. The influences given by different initialization condition have been successfully overcome. Compared with other algorithms, the algorithm proposed is much faster. This dissertation demonstrates the advantages of the proposed algorithm by simulator experimentation.

关键词： double sparisity K-SVD non-negative matrix factorization

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Impulsive control for a Class of Delayed Parabolic Complex Networks

Impulsive Control for a Class of Delayed Parabolic Complex N...

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American control Conference

作者： Jin-Liang Wang Huai-Ning Wu Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9781457710957

This paper proposes a new parabolic complex dynamical network model. An impulsive delay differential inequality is employed to analyze the global exponential stability of the proposed network model under impulsive control. On the basis of the analysis, a design procedure of impulsive controllers is presented. Finally, a numerical example is given to illustrate the efficiency of the derived outcome.

关键词： Impulsiveness network model complex networks numerical example design process exponential stability. dynamic network

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A novel decoupling control method for multivariable systems with disturbances

A novel decoupling control method for multivariable systems ...

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2012 UKACC International Conference on control, control 2012

作者： Liu, Rui-Juan Liu, Guo-Ping Wu, Min School of Information Science and Engineering Central South University Changsha 410083 China Faculty of Advanced Technology University of Glamorgan Pontypridd CF37 1DL United Kingdom Hunan Engineering Laboratory for Advanced Control and Intelligent Automation Changsha 410083 China

ISBN: (纸本)9781467315609

This paper presents a novel decoupling method for multivariable systems with disturbances. In this method, the undesirable coupling parts in each loop are treated as the output disturbances. These disturbances, as well as the external disturbances, can be actively rejected by the equivalent-input- disturbance (EID) approach. The parameters of the controller in each loop can be designed independent of each other. A typical example demonstrates the simplicity in parameters design and good performance in decoupling control and disturbance rejection. © 2012 IEEE.

关键词： Disturbance rejection

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A two-pass clustering algorithm based on linear assignment initialization and k-means method

A two-pass clustering algorithm based on linear assignment i...

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5th International Symposium on Communications control and Signal Processing, ISCCSP 2012

作者： Cheng, Kin Luen Fan, Jianchao Wang, Jun ASM Pacific Technology Limited Kwai Chung Hong Kong School of Control Science and Engineering Dalian University of Technology Dalian China Dept. of Mechanical and Automation Engg. Chinese University of Hong Kong Shatin Hong Kong

ISBN: (纸本)9781467302760

This paper presents a two-pass clustering algorithm with a combination of the linear assignment and k-means methods. To avoid the inconsistency of clustering results from the k-means method with random initialization, the linear assignment method with the least similar cluster representatives is applied first to generate initial clusters, and then followed with the k-means method. This approach is applied to four well-known practical UCI datasets. The results are compared with those from the k-means method with other random initialization approaches and it is shown that the two pass approach consistently results in the best clustering results. The application results on color image segmentation are also demonstrated. © 2012 IEEE.

关键词： Image segmentation

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A novel computer network traffic modeling based on threshold-optimization

A novel computer network traffic modeling based on threshold...

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International Conference on Automatic control and Artificial Intelligence (ACAI 2012)

作者： Jian Shi Shaoping Wang Kang Wang Daniel Delaurentis School of Automation Science and Electrical Engineering Beihang University Beijing China School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing China School of Aeronautics and Astronautics Purdue University West Lafayette IN USA

ISBN: (纸本)9781627481205

Aiming at bottlenecks (such as ambiguous physical meaning, complex mathematical expression, and so on) in traditional network traffic modeling analysis, this paper puts forward a novel threshold-optimization-based traffic *** this model, the actual network traffic is divided into two different parts (i.e., a-traffic with burst characteristic, and b-traffic with steady characteristic) according to optimized threshold results obtained with particle swarm optimization algorithm. The a-traffic and b-traffic are respectively described with mathematical formulas which not only can depict the traffic nature precisely but also can be resolved easily. It is proved that the threshold-optimization-based traffic model presented in this paper can describe the traffic nature more accurately.

关键词： Particle Swarm Optimization (PSO) computer network threshold-optimization traffic modeling

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The design of shaped-beam bifilar helix antenna with conical pattern

The design of shaped-beam bifilar helix antenna with conical...

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1st International Conference on Wireless Communications and Applications, ICWCA 2011

作者： Qu, Xiao-Yun Zong, Wei-Hua Yang, Zhi-Qun Mu, Jian-Ming China Aerospace Science and Technology Corporation No.513 Institute Yantai Shandong Province 264003 China Shandong Provincial Key Laboratory of Industrial Control Technology School of Automation Engineering Qingdao University Qingdao Shandong Province 266071 China

ISBN: (纸本)9783642291562

A shaped-beam antenna is proposed using bifilar helix antenna. The antenna is fed by a notched balancer. The radiation pattern and the axial ratio changing with the helix pitch distance are simulated in the paper. The measured gain and |S11| are also given. The antenna has a wide bandwidth of more than 40% with conical radiation pattern and circular polarization. It can be used in outer space communications due to its low profile and high reliability. © 2012 ICST Institute for Computer science, Social Informatics and Telecommunications engineering.

关键词： Impedance matching (electric)

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