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作者： Zhao, Yu Huang, Biao Su, Hongye Chu, Jian State Key Lab. of Industrial Control Technology Institute of Cyber Systems and Control Zhejiang University Hangzhou 310027 China University of Alberta Canada Department of Chemical and Materials Engineering University of Alberta Edmonton AB T6G 2G6 Canada

This paper is concerned with the identification of multiple model process with transition using the output error (OE) method. Local multiple linear models with output error model structure are identified at fixed operating points first and then a global nonlinear model is approximated by interpolating the multiple linear models with exponential weighting functions. With all the obtained initial values of the system's parameters, nonlinear optimization strategy is implemented to find the optimal values of the parameters for both the local multiple models and their corresponding weighting functions. Finally a more accurate global model can be obtained. The effectiveness of the proposed approach is demonstrated through simulation examples. © 2011 Zhejiang University.

关键词： Errors

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Privacy Preserving Maximum Consensus

Privacy Preserving Maximum Consensus

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IEEE Annual Conference on Decision and control

作者： Xiaoming Duan Jianping He Peng Cheng Yilin Mo Jiming Chen The State Key Lab. of Industrial Control Technology Zhejiang University China School of Electrical and Electronics Engineering Nanyang Technological University

ISBN: (纸本)9781479978878

Maximum consensus is useful in many applications such as leader selection and time synchronization, and it is advantageous for its decentralization and finite time convergence. However, without preservation mechanisms for maximum consensus, nodes' initial states and especially the identity of the node with the maximum initial state will be disclosed, which is undesirable in some application scenarios. To preserve the privacy of maximum consensus while maintaining its advantages, we propose a Privacy Preserving Maximum Consensus (PPMC) algorithm, where all nodes independently generate and transmit random numbers before sending out their initial states. We prove that PPMC converges in finite time. Meanwhile, explicit formulas are given to characterize the probability that the maximum state owner's identity is inferred by its neighbors. Extensive simulations are conducted to demonstrate the effectiveness of the proposed algorithm.

关键词： Privacy Convergence Nickel Security Topology Network topology Broadcasting

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An Efficient Smoke Detection Approach Based on Dual-Channel Neural Network

An Efficient Smoke Detection Approach Based on Dual-Channel ...

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2022 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2022

作者： Zhou, Chengxu Wang, Dongxia Cai, Haoran School of Electronics and Information Engineering Liaoning University of Technology China Dalian University of Technology Key Lab. of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Jinzhou Dalian China School of Electronics and Information Engineering Tianjin University of Technology and Education Tianjin China School of Electronics and Information Engineering Liaoning University of Technology Jinzhou China

ISBN: (纸本)9798350332421

Smoke is the key feature of fire detection in its early age. Thus, an efficient smoke detection approach (i. e. an accurate and rapid method) is essential important to prevent fires. However, it is difficult to obtain an efficient method due to non-obvious details and monotonous color of smoke images. Moreover, traditional methods of smoke detection based on CNN contains lots of parameters and operations, which severely influents the computing efficiency in practical applications. Thus, we propose an efficient dual-channel neural network (EDCNN) on the basis of the state-of-The-Art DCNN. Concretely, we use the linear inverted bottleneck (LIB) to replace the traditional convolution layers on DCNN to build a light weight deep neural network. The introduction of the LIB block can efficiently trade off between accuracy and latency. Moreover, ReLU6 is used as the activation function, because it is more suitable for low-precision hardware devices. We then use some experimental results to demonstrate the effectiveness of EDCNN compared with the competitors for smoke detection in terms of model and computational complexity. © 2022 IEEE.

关键词： Smoke

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Speed sensorless control for wind turbine systems based on Hamiltonian model observer

Speed sensorless control for wind turbine systems based on H...

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作者： Ren, Li-Na Liu, Fu-Cai Jiao, Xiao-Hong Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

ISBN: (纸本)9789881725592

Aimed at the rotor speed unmeasured, this paper presents a speed sensorless control strategy with observer for permanent magnet wind turbine generator based on port-controlled Hamiltonian (PCH) model. The PCH model is established by taking full advantage of the physics structure of wind turbine system and then the full-order observer is proposed based the PCH model to estimate rotor speed. This structure of controller is simple but also reflecting physical meaning. Moreover, an adaptive controller is investigated under the uncertain parameters and the external disturbance. The proposed strategy is proved valid by the simulation illustration. © 2011 Chinese Assoc of Automati.

关键词： Permanent magnets

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Wireless MIMO switching with zero-forcing relaying

Wireless MIMO switching with zero-forcing relaying

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2011 49th Annual Allerton Conference on Communication, control, and Computing, Allerton 2011

作者： Wang, Fanggang Liew, Soung Chang Guo, Dongning Institute of Network Coding Chinese Univ. of Hong Kong Hong Kong State Key Lab. of Rail Traffic Control and Safety EIE Beijing Jiaotong Univ. China Department of Electrical Engineering and Computer Science Northwestern Univ. China

ISBN: (纸本)9781457718168

A wireless relay with multiple antennas is called a multiple-input- multiple-output (MIMO) switch if it forms a one-to-one mapping from the inputs (uplinks) to the outputs (downlinks). This paper studies the case with N source stations and N destination stations (which may be the same set), so that the mapping is any permutation of the N inputs. Moreover, the switching is achieved by "precode-and-forward", i.e., the relay precodes the received vector signal by a zero-forcing matrix and transmits it, so that each destination station receives only its desired signal with enhanced noise but no interference. Assuming full channel state information is availab.e at the switch, the design of the zero-forcing precoder for maximizing some performance metric based on the received signal-to-noise ratios is investigated. The problem with two stations is completely solved in closed form in certain cases. In other cases, heuristic algorithms are proposed to optimize the precoder. These algorithms are shown to be near-optimal. © 2011 IEEE.

关键词： Beamforming

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Integral Sliding Mode control for PMSM with Uncertainties and Disturbances via Nonlinear Disturbance Observer

Integral Sliding Mode Control for PMSM with Uncertainties an...

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第三十九届中国控制会议

作者： Jianxiong Li Hongmei Ren Songhua Wang Yiming Fang Research Center of the Ministry of Education for Intelligent Control System and Intelligent Equipment Yanshan University The Key Lab of Industrial Computer Control Engineering of Yanshan University

In this paper, a nonlinear disturbance observer-based(NDOB) integral sliding mode control(SMC) algorithm is proposed for speed control of permanent magnet synchronous motor(PMSM) in the presence of uncertain parameters and external time-varying load toque. Firstly, three nonlinear disturbance observers(NDOs) are constructed to estimate the lumped disturbances comprising of uncertain parameters and/or disturbances in speed loop and two current loops, respectively. Secondly, an integral sliding mode controller is developed based on the NDOs. It can be proved that the resulting closed loop system is asymptotically stable and the speed tracking error converges to zero asymptotically in theory. Finally, experiment results are given to validate the proposed control method.

关键词： PMSM sliding mode control nonlinear disturbance observer uncertain parameters time varying load torque

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Robust nonlinear model predictive control algorithm based on reduced precision solution criteria

Robust nonlinear model predictive control algorithm based on...

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World Congress on Intelligent control and Automation (WCICA)

作者： Jiaona Wan Tiejun Zhang Kexin Wang Xueyi Fang Zhijiang Shao Research Institute of Highway Ministry of Transport Beijing 100088 China State Key Lab. of Industrial Control Technology Institute of Industrial Control Department of Control Science and Engineering Zhejiang University Hangzhou 310027 China

This paper discusses the robustness of nonlinear model predictive control (NMPC) based on sub-optimal solution obtained under reduced precision solution (RPS) criteria. NMPC needs to solve the optimal control problem (OCP) quickly and the input is injected to the controlled plant in time. Traditional convergence criteria in optimization algorithms usually cost excessive long computation time with little improvement of solution, which results in degradation of control performance eventually. RPS criteria are new convergence criteria for deciding whether the current iterate is good enough and whether the optimization procedure should be terminated. It can terminate the optimization process timely. This work pays special attention to robustness of the closed-loop system controlled by NMPC with RPS criteria when model plant mismatch exists. Simulations demonstrate that the proposed algorithm owns good robustness and stability.

关键词： Optimization Delay Mathematical model Computational modeling Convergence Robustness Asymptotic stability

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Modeling forest fire spread process based on percolation theory

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Journal of Information and Computational Science 2010年第9期7卷 1930-1937页

作者： Li, Guanghui Xia, Qibiao Li, Hong Feng, Dongqin School of Information Engineering Zhejiang A and F University Hangzhou 311300 China State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou 310027 China

A forest fire spread model and its simulation algorithm based on 2D percolation lattice are presented in this paper, which can be used to simulate the forest fire spread process. The theoretical analysis and simulation experimental results show that, when the site concentration p is 0.6, the forest will approximately reach its percolation threshold. The presented model can describe the forest fire spread dynamics, and can improve the strategies for fire control and forest resource management. Moreover, the presented simulation algorithm has lower complexity than that in literature. © 2010 Binary Information Press.

关键词： Solvents

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Event-Triggered Fault-tolerant Model Predictive control of Nonlinear Multi-agent System with Time Delay and Parameter Uncertainty

Event-Triggered Fault-tolerant Model Predictive Control of N...

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第40届中国控制会议

作者： Linglong Wang Jianxiong Li Xinjian Liu Yiming Fang Research Center of the Ministry of Education for Intelligent Control System and Intelligent Equipment Yanshan University The Key Lab of Industrial Computer Control Engineering of Yanshan University

This paper proposes a compound control method combining with robust model predictive control(RMPC) method and the event-triggered mechanism for a class of nonlinear multi-agent system(NMAS) with time delay, uncertainties, actuator faults and input constraints. Specifically, at each sampling time, the control action is calculated by solving an online constrained optimization problem,using Lyapunov-Krasovskii functions to design state feedback control laws to ensure that the consensus error of the NMAS tends to zero and the event-triggered mechanism can save communication resources. Finally, the effectiveness of the proposed event-triggered fault-tolerant RMPC method is verified by an example.

关键词： robust model predictive control fault-tolerant control non-linear multi-agent system event-triggered mechanism

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CLSIFT: An optimization study of the scale invariance feature transform on GPUs

CLSIFT: An optimization study of the scale invariance featur...

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15th IEEE International Conference on High Performance Computing and Communications, HPCC 2013 and 11th IEEE/IFIP International Conference on Embedded and Ubiquitous Computing, EUC 2013

作者： Wang, Weiyan Zhang, Yunquan Guoping, Long Yan, Shengen Jia, Haipeng Lab. of Parallel Software and Computational Science Institute of Software Chinese Academy of Sciences China State Key Laboratory of Computing Science Institute of Software Chinese Academy of Sciences China School of Computer and Control Engineering University of Chinese Academy of Sciences Beijing China

ISBN: (纸本)9780769550886

Scale Invariance Feature Transform (SIFT) is quite suitable for image matching because of its invariance to image scaling, rotation and slight changes in illumination or viewpoint. However, due to high computation complexity it's technically challenging to deploy SIFT in real time application situations. To address this problem, we propose CLSIFT, an OpenCL based highly speeded up and performance portable SIFT solution. Important optimization techniques employed in CLSIFT such as: (1) For less global memory traffic, independent logical functions are merged into the same kernel to reuse data.(2) loop buffers are introduced in for data and intermediate results reusing.(3)Task queue used to schedule threads in the same branch to remove branch divergences. (4) Data partition is based on the statics patterns for workload balance among workgroups. (5) Overlap of CPU time and better parallel strategies are used too. With all mentioned efforts, CLSIFT processes lena. jpg at 74.2 FPS and 43.4FPS respectively on NVidia and AMD GPUS, much higher than CPU's nearly 10 FPS and the known fastest SIFTGPU's 39.8 FPS and 13FPS. Moreover in a quantitative comparison approach we analyze those successful strategies beating SIFTGPU, a famous existing GPU implementation. Additionally, we observe and conclude that NVidia GPU achieves better occupancy and performance due to some factors. Finally, we summarize some techniques and empirical guiding principles that may be shared by other applications on GPU. © 2013 IEEE.

关键词： Graphics processing unit

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