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Nonlinear Adaptive control of Exhaust Gas Recirculation for Large Diesel Engines

IFAC-PapersOnLine 2015年第16期48卷 254-260页

作者： Kræn V. Nielsen Mogens Blanke Morten Vejlgaard-Laursen Automation and Control Group Dept. of Electrical Engineering Technical University of Denmark Kgs. Lyngby Denmark MAN Diesel & Turbo Teglholmsgade 41 Copenhagen Denmark AMOS CoE Institute of Technical Cybernetics Norwegian University of Science and Technology Trondheim Norway

A nonlinear adaptive controller is proposed for the exhaust gas recirculation system on large two-stroke diesel engines. The control design is based on a control oriented model of the nonlinear dynamics at hand that incorporates fuel flow and turbocharger speed changes as known disturbances to the exhaust gas recirculation. The paper provides proof of exponential stability for closed loop control of the model given. Difficulties in the system include that certain disturbance levels will make a desired setpoint in O 2 unreachable, for reasons of the physics of the system, and it is proven that the proposed control will make the system converge exponentially to the best achievable state. Simulation examples confirm convergence and good disturbance rejection over relevant operational ranges of the engine.

关键词： Exhaust gas recirculation diesel engines nonlinear control adaptive control modelling for control parameter estimation

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Trajectory tracking control for hovering and acceleration maneuver of Quad Tilt Rotor UAV 33

Trajectory tracking control for hovering and acceleration ma...

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第三十三届中国控制会议

作者： LIN Qing CAI Zhihao YANG Jinpeng SANG Yun WANG Yingxun School of Automation Science and Electrical Engineering Beihang University Science and Technology on Aircraft Control Laboratory Beihang University

ISBN: (纸本)9781479947249

The ability to transition between vertical and horizontal flight is of great importance to convertible unmanned aerial vehicles. A novel convertible UAV-a Quad Tilt Rotor UAV(QTR UAV) was designed, which could operate as a quad rotor as well as an airplane by means of transition maneuver. This paper focuses on the trajectory tracking control for the hovering mode and acceleration maneuver which is the basis for the transition maneuver. First, a prototype QTR UAV was constructed to prove the concept and validate the proposed layout, which demonstrated good stability and control characteristics under manual control. Then dynamic model for full flight profile was constructed according to the first principle. A control strategy was scheduled for the transition maneuver. A nonlinear controller was designed based on dynamic inversion method. The effectiveness of the proposed control methodology was shown through numerical simulations.

关键词： Quad Tilt Rotor UAV,hovering and acceleration maneuver,trajectory tracking,dynamic inversion

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Attitude tracking control of a quadrotor based on linear active disturbance rejective control

Attitude tracking control of a quadrotor based on linear act...

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IEEE International Conference on Cyber Technology in automation, control, and Intelligent Systems

作者： Jingdu Gao Yan Zhuang Jizhong Xiao Yiwen Zhao School of Control Science and Engineering Dalian University of Technology Dalian China Department of Electrical Engineering The City College City University of New York New York USA State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China

A quadrotor is a typical multiple-input multiple-output (MIMO), underactuated, strong coupled nonlinear system with parameter uncertainty and unmodeled disturbance. To track the desired attitude and height, a linear active disturbance rejection control (LADRC) approach is utilized for the quadrotor control. LADRC has the capacity of estimating and compensating the generalized disturbance, and reduce the system to a unit gain double integrator, which is easily implemented and robust to environment disturbances. A simplified dynamic model of quadrotor is established using Newton-Euler equations. The design of LADRC is verified through numerical simulation and compared with PID controller. Simulation results indicate the LADRC can be used to achieve good performance in tracking the desired attitude and height.

关键词： Mathematical model control systems Observers Attitude control Aerodynamics Numerical models Propellers

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Bilateral Teleoperation of Multiple Agents with Formation control

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IEEE/CAA Journal of Automatica Sinica 2014年第2期1卷 141-148页

作者： Jing Yan Xian Yang Cailian Chen Xiaoyuan Luo Xinping Guan Institute of Electrical Engineering Yanshan University Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China

This paper studies the formation problem for multislave teleoperation system over general communication networks,where multiple mobile slave agents are coupled with a single master robot. The forward and backward network transmission time delays are assumed to be asymmetric and *** to the quantization in the network, a dynamic quantization strategy is provided to quantize the output signals of the master robot and slave agents before transmitting. Then, a novel masterslave protocol is designed to achieve the formation task under variable time delays and quantization. Additionally, the sufficient conditions for stability are presented to show that the formation protocol can stabilize the master-slave system under variable time delays and quantization. Finally, simulation are performed to show effectiveness of the main results.

关键词： Robots Quantization (signal) Delay effects Protocols Stability analysis Delays Multi-agent systems

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Phase angle adjustment for phase advance control of brushless DC motor

Phase angle adjustment for phase advance control of brushles...

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2014 5th International Conference on Intelligent and Advanced Systems, ICIAS 2014

作者： Syafiq Bin Mohd, Mohd Noh Bin Karsiti, Mohd Syaifuddin Bin Mohd, Mohd Automation and Control System Cluster / MOR Energy Department of Electrical Engineering UniversitiTeknologi PETRONAS Malaysia

ISBN: (纸本)9781479946549

Brushless direct current (BLDC) motor is widely used in small and medium side electric vehicles as it exhibit highest specific power and thermal efficiency compared with induction motor. The permanent magnets in the rotor create a constant magnetic flux, which limit the motor top speed. As the back electromotive force (EMF) voltage increases proportionally with motor rotational speed and it approaches the amplitude of the input voltage, the phase current amplitude will reach zero. By advancing the phase current, it is possible to extend the maximum speed of the BLDC motor beyond the rated top speed. This will allow smaller BLDC motor to be used in small electric vehicles and in larger applications will allow the use of BLDC motor without the use of multispeed transmission unit for high speed operation. Adjusting the phase angle will affect the speed of the motor as the each coil is energized earlier than the corresponding rise in back emf of the coil. Preliminary test results indicated that the motor top speed can be increased at least by 40 percent over the baseline speed at no load condition. © 2014 IEEE.

关键词： Speed

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Double-loop control strategy for three-phase PWM rectifier of AC drive system

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Gongcheng Kexue Xuebao/Chinese Journal of engineering 2015年 37卷 185-191页

作者： Tong, Chao-Nan Cao, Jing Zhou, Jing-Hua School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China School of Electrical Engineering and Control North China University of Technology Beijing100144 China

In order to study high-performance pulse-width modulation (PWM) rectifier, a novel dual loop control strategy was proposed using sliding mode control and repetitive control with good anti disturbance performance in application of rectifier control. The sliding mode control with boundary layer and exponential reaching law was applied to the outer loop voltage control, and the repetitive and proportion integration (PI) hybrid control strategy was applied to the current inner loop control. The control method was tested in 50 kW experiment platform. Simulation and experimental results prove the validity of the control strategy. The experimental results show that this method can achieve the aim of stable DC voltage, good input current, and bidirectional energy control. It is easy to implement in engineering, and it is especially suitable for the energy feedback control of alternating current (AC) speed regulation. © All right reserved.

关键词： Sliding mode control

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Global Stabilization via Sampled-Data Output Feedback control for a Class of Nonlinear Systems Subject to Time-Delays

Global Stabilization via Sampled-Data Output Feedback Contro...

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第三十四届中国控制会议

作者： Hongyan Chu Chunjiang Qian Jiquan Yang Shengyuan Xu Wenting Zha Department of Energy and Mechanical Engineering Nanjing Normal University Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing Normal University School of Automation Nanjing University of Science and Technology Department of Electrical & Computer Engineering The University of Texas at San Antonio Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University

ISBN: (纸本)9781467374439

This paper considers the problem of global output feedback stabilization via sampled-data control for a class of uncertain nonlinear systems subject to time delays. The system satisfies a lower-triangular linear growth condition with unknown growth rates. A new inductive method is first introduced to estimate the state growth in the presence of time delays and nonvarnishing nonlinearities. When only the output of the system is measurable, with the help of output domination approach, a sampled-data output feedback controller is constructed to solve the global stabilization problem. The proposed sampled-data controller is linear in structure and therefore can be easily implemented in practice.

关键词： Sampled-data,output feedback,time delay,domination approach

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Research on cascaded H-bridge SVG

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Journal of Networks 2014年第7期9卷 1941-1947页

作者： Yu, Yannan Yang, Rongfeng Yan, Jichi Qu, Chang School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China School of Electrical and Control Engineering Heilongjiang University of Science and Technology Harbin China The R & D department Harbin new-tech Technology Development Co. Ltd Harbin China

Due to the sharp increase of the non-linear loads, the power quality lagged behind the need for an adequate power system. With a fast response, low loss, low output harmonic current, SVG has become the mainstream of dynamic reactive power compensation devices. The paper introduces a multilevel cascaded H-bridge SVG, featured with DSP+FPGA dual-core control unit and fault-tolerant redundant system, which will enhance the reliability and dynamic response, reduce the switching loss and equipment cost, and increase the efficiency of the reactive power compensation. Through instructing the MATLAB simulation model of SVG and testing model machine, the design correction of medium voltage SVG power circuits and parameters is verified. The model machine is working well. © 2014 ACADEMY PUBLISHER.

关键词： MATLAB

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Adaptive fuzzy control of output-constrained switched nonlinear systems

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ICIC Express Letters 2015年第12期9卷 3355-3362页

作者： Niu, Ben Liu, Yanli Shen, Mouquan School of Control Science and Engineering Dalian University of Technology No. 2 Linggong Road Ganjingzi District Dalian China College of Mathematics and Physics Bohai University No. 19 Keji Road New Songshan District Jinzhou China Automation Research Institute Bohai University No. 19 Keji Road New Songshan District Jinzhou China College of Electrical Engineering and Control Science Nanjing Technology University Nanjing China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing China

In this paper, the problem of adaptive fuzzy tracking control is considered of uncertain switched nonlinear systems with an output constraint. First, a barrier Lyapunov function (BLF) is employed to deal with the output constraint. Then fuzzy logic systems are used to approximate the unknown nonlinearities and backstepping technique is employed to construct an adaptive fuzzy controller. The designed controller guarantees all the closed-loop signals remain bounded while the system output converges to a small neighborhood of the desired reference signal without violating the constraint. An example is given to demonstrate the validity of the developed result. © 2015 ICIC International.

关键词： Lyapunov functions

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Learning Part-based Dictionary by Sparse NMF for Face Gender Recognition

Learning Part-based Dictionary by Sparse NMF for Face Gender...

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International Symposium on Computational Intelligence and Design

作者： Jiali Ge Tong Zhou Fan Zhang Ken Tse School of Control Science and Electrical Engineering Nanjing Tech University Nanjing China Department of Computer Science and Technology Xidian University Xi'an China School of Automation and Information Engineering Xi'an University Of Technology Xi'an China Department of Computer Science University of California Los Angeles USA

ISBN: (纸本)9781467395885

Face gender recognition is a very challenging problem in computer vision, which plays an important role in many visual applications. In this paper, we present a framework that combines the unsupervised dictionary learning and supervised classifier training together to this gender recognition problem. We firstly apply sparse nonnegative matrix factorization (sparse NMF) to learn intrinsic part-based dictionary from face images in an unsupervised manner. After that we encode all the data by the learned dictionary, and train a SVM or logistic regression classifier in a supervised manner on those representations. Our experimental results show that the learned dictionaries by sparse NMF can not only capture meaningful features from the faces, but also boost the performance of the subsequent classifier in terms of classification accuracies and speeds.

关键词： face gender reconition sparse non-negative matrix factorization SVM logistic regression dictionary learning

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