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Sliding mode controller by using adaptive exponential reaching law based on nonlinear disturbance observer

ISA Transactions 2025年

作者： Liu, Ying Li, Gongfa Du Jiang Yun, Juntong Tao, Bo Jiang, Guozhang Kong, Jianyi Chen, Baojia Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Research Center for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of science and Technology Wuhan430081 China Precision Manufacturing Research Institute Wuhan University of Science and Technology Wuhan430081 China Hubei Longzhong Laboratory Xiangyang441000 China Hubei Key Laboratory of Hydroelectric Machinery Design& Maintenance China Three Gorges University Yichang443002 China

Aiming at the position tracking control problem of flexible jointed manipulator in the uncertainties and external disturbances, this paper proposes an integrated nonlinear disturbance observer (NDOB) and a non-singular fast terminal sliding mode (NFTSM) control method based on adaptive exponential reaching law (AERL). The NDOB is designed to ensure that the time-varying disturbance is suppressed in finite time. The AERL is designed to improve the track tracking speed and reduce the chattering of the control input. Simulation results show that compared with the optimal ARL, the proposed method reduces the trajectory tracking error by 1.3 %, improves the trajectory tracking convergence speed. Experimental results show that the proposed method reduces the trajectory tracking error by 0.545 %. © 2025 ISA

关键词： Sliding mode control

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A New Method to Estimate the Severity of Interturn Short-Circuit Fault for PMSM

A New Method to Estimate the Severity of Interturn Short-Cir...

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Power Systems and Electrical technology (PSET), IEEE International Conference on

作者： Zhaofei Zeng Man Zhang Luan Chen Qi Huang Ding Sun Key Laboratory of Wi de-area Measurement and Control on Power System of Sichuan Province University of Electron ic Science and Technology of China Chengdu China 1University of Electronic Science and Technology of China Chengdu China Institute of Electronic and Information Engineering of UESTC in Guangdong UESTC in Guangdong Dongguan China Chengdu Univer sity of technology Chengdu China Key Laboratory of W ide-area Measurement and Control on Power System of Sichuan Province University of Electron ic Science and Technology of China Chengdu China

This paper proposes a new method to determine the number of shorted turns for permanent magnet synchronous motor (PMSM). At first, the equivalent circuit model of PMSM under both normal condition and inter-turn short-circuit (ITSC) fault are presented. Then, the procedure to estimate the severity of ITSC in PMSM is introduced. In detailed, the stator winding of PMSM at standstill is excited by a low AC voltage, the corresponding current can be measured including its amplitude and phase, finally, the severity estimation indicator is established based on the electromagnetic parameters, including amplitude and phase of voltage and current, phase inductance and resistance. The effectiveness of the proposed method is verified by some simulations, which illustrates that the proposed method have good accuracy in the number of shorted turns detection in the range from the fault-free state to the full-winding fault state. The method proposed in this paper can be directly implemented without installing complex equipment and additional sensors on the motor, and it has utility value in the maintenance of PMSM.

关键词： Resistance Voltage measurement Phase measurement Power supplies Simulation Stator windings Sensor phenomena and characterization

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A New Combined Heat Source Model of Hollow-Cathode Nanosecond Pulsed Electron Beam for Material Irradiation

SSRN

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SSRN 2023年

作者： He, Weiguo Huo, Weijie Duan, Xinxin Zhu, Kangwu Wang, Feng School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310024 China Key Laboratory of Gravitational Wave Precision Measurement of Zhejiang Province Taiji Laboratory for Gravitational Wave Universe Hangzhou310024 China Shanghai Aerospace Electronic Technology Institute Shanghai201109 China Shanghai Aerospace Control Technology Institute Shanghai201109 China

The hollow-cathode nanosecond pulsed electron beam changes the components and organization of the material surface through thermal coupling and prepares a modified layer on the surface of the base material with greatly optimized physicochemical and mechanical properties, which has a wide range of applications. In this study, in view of the insufficient research on the heat source model in the hollow-cathode nanosecond pulsed electron beam, a combined heat source model is proposed for the first time by abstracting the action of the hollow-cathode electron beam and the material as two sets of Gaussian heat sources with different parameters, and by equating the heat source of the action of the high-energy electron beam with the body heat source, and the action of the irradiation of the electron beam during the on-state phase with the surface heat source, respectively. Besides, the influence of heat source parameters on the temperature distribution is analyzed. The results show that for the nanosecond pulsed intense current electron beam-material interaction process, the use of a multi-parameter heat source model describes it more accurately compared to the average energy density values. At the same time, in order to further verify the accuracy of the model, a validation experiment was carried out using the titanium alloy Ti-6Al-4V material, and the experimental results show that the formation of irradiation morphology can be more accurately described using the combined heat source model with different storage energies, and the experimental results also show that uniform irradiation effect in a certain area can be realized by reasonably choosing the parameters of the energy storage capacitor. © 2023, The Authors. All rights reserved.

关键词： Electron beams

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Towards Simulation of CubeSat Operational Scenarios under a Cyber-Physical Systems View 10

Towards Simulation of CubeSat Operational Scenarios under a ...

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10th Latin-American Symposium on Dependable Computing, LADC 2021

作者： De Almeida, Danilo Pallamin Graics, Bence Chagas, Ronan Arraes Jardim De Sousa, Fabiano Luis Mattiello-Francisco, Fatima National Institute for Space Research Lab VVSis Sao Jose dos Campos Brazil Budapest University of Technology and Economics Dept. of Measurement and Information Systems Budapest Hungary National Institute for Space Research Systems Engineering Division Sao Jose dos Campos Brazil National Institute for Space Research Space Mechanics and Control Division Sao Jose dos Campos Brazil

ISBN: (纸本)9781665478311

In the development of academic CubeSat-based space missions, it is common to skip or rush many practices of the Systems engineering Process due to time and cost constraints, which may lead to issues later on in the mission and failures. Mission concept analyses are often in these practices, including the analysis of the in-orbit behavior of the satellite with respects to power consumption and data generation. With the purpose of supporting these analyses, this article introduces a workflow based on a Cyber-Physical abstraction of CubeSat mission operation scenarios, which uses architectural models based on SysML Class Diagrams and automatic model transformation to support the simulation of these operational scenarios in an open source Model-Based System engineering (MBSE) tool. These simulations can be used in mission concept analyses in Phase-0 studies to verify initial operations requirements and drive further design implementations. © 2021 IEEE.

关键词： Cost engineering

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Quantum state and detector tomography with known rank

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IFAC-PapersOnLine 2023年第2期56卷 5881-5887页

作者： Shuixin Xiao Yuanlong Wang Jun Zhang Daoyi Dong Hidehiro Yonezawa School of Engineering and Information Technology University of New South Wales Canberra ACT 2600 Australia University of Michigan - Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Centre for Quantum Computation and Communication Technology Australian Research Council Canberra ACT 2600 Australia

Quantum state tomography and quantum detector tomography are two main problems in quantum system identification. In this paper, we study state tomography and detector tomography with prior knowledge about the true rank of the unknown state/detector. In this case, we propose a sufficient condition for static (non-adaptive) tomography algorithms to achieve the optimal infidelity scaling O(1/N) on the number of state copies N. Then we present two examples of such static quantum state tomography and quantum detector tomography algorithms. Numerical examples demonstrate the effectiveness of our algorithms.

关键词： Quantum system identification quantum state tomography quantum detector tomography

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Revealing the structure and distribution changes of corn stalk lignin during the Organosolv Pretreatment

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Industrial Crops and Products 2023年第1期201卷

作者： Li, Xu Xia, Ying Hu, Xiaohong Liu, Qiying Li, Wenzhi Yan, Long Ma, Longlong Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei230026 China Key Laboratory of Energy Thermal Conversion and Process Measurement and Control of Ministry of Education School of Energy and Environment Southeast University Jiangsu Nanjing210096 China CAS Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou510640 China

During the pretreatment of biomass, the research on the migration process of lignin in the cell wall and the change of chemical structure is very important for improving pretreatment and subsequent lignin upgrading. Hence, corn stalk lignin was extracted by 1, 4-dioxane organosolv system under mild conditions with varying pretreatment time and 0.1 M hydrochloric acid as catalyst. The heterogeneity of lignin removal in the different morphological areas of the cell wall was revealed by advanced imaging techniques. Results indicated that during the pretreatment with dioxane organosolv, the removal of lignin started from the secondary wall of the cell wall, and gradually developed outward to the compound middle lamella. Meanwhile, the resulting lignin obtained through different pretreatment times was characterized by two-dimensional heteronuclear single quantum coherence spectroscopy (2D-HSQC) and gel permeation chromatography (GPC). These characterization results indicated that there were more syringyl (S) units in the lignin that were removed first, and the proportion of guaiacyl (G) units was increased as the pretreatment continued. All the evidence supports the idea that the main reason for the significant differences in lignin structures at various periods of the lignin removal process is that the lignin come from different cell wall regions. © 2023

关键词： Lignin

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Optimal control of linear Gaussian quantum systems via quantum learning control

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Physical Review A 2024年第6期109卷 063508-063508页

作者： Yu-Hong Liu Yexiong Zeng Qing-Shou Tan Daoyi Dong Franco Nori Jie-Qiao Liao Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan Province Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Theoretical Quantum Physics Laboratory Cluster for Pioneering Research Quantum Computing Center Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communication College of Physics and Electronics School of Engineering and Information Technology Department of Physics Institute of Interdisciplinary Studies

Efficiently controlling linear Gaussian quantum (LGQ) systems is a significant task in both the study of fundamental quantum theory and the development of modern quantum technology. Here, we propose a general quantum-learning-control method for optimally controlling LGQ systems based on the gradient-descent algorithm. Our approach flexibly designs the loss function for diverse tasks by utilizing first- and second-order moments that completely describe the quantum state of LGQ systems. We demonstrate both deep optomechanical cooling and large optomechanical entanglement using this approach. Our approach enables the fast and deep ground-state cooling of a mechanical resonator within a short time, surpassing the limitations of sideband cooling in the continuous-wave driven strong-coupling regime. Furthermore, optomechanical entanglement could be generated remarkably fast and surpass several times the corresponding steady-state entanglement, even when the thermal phonon occupation reaches one hundred. This work will not only broaden the application of quantum learning control, but also open an avenue for optimal control of LGQ systems.

关键词： Optomechanics Quantum optics

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A Multi-Conditional Proxy Broadcast Re-Encryption Scheme for Sensor Networks

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Computers, Materials & Continua 2020年第12期65卷 2079-2090页

作者： Pang Li Lifeng Zhu Brij B.Gupta Sunil Kumar Jha Nanjing Vocational College of Information Technology Nanjing210044China State Key Laboratory of Bioelectronics Jiangsu Key Laboratory of Remote Measurement and ControlSchool of Instrument Science and EngineeringSoutheast UniversityNanjing210096China Department of Computer Engineering National Institute of TechnologyKurukshetra136119India Department of Computer Science and Information Engineering Asia UniversityTaichung41449Taiwan IT Fundamentals and Education Technologies Applications University of Information Technology and Management in RzeszowRzeszow Voivodeship100031Poland

In sensor networks,it is a challenge to ensure the security of data exchange between packet switching nodes holding different private *** order to solve this problem,the present study proposes a scheme called multi-conditional proxy broadcast re-encryption(MC-PBRE).The scheme consists of the following roles:the source node,proxy server,and the target *** the condition is met,the proxy can convert the encrypted data of the source node into data that the target node can directly *** allows the proxy server to convert the ciphertext of the source node to a new ciphertext of the target node in a different group,while the proxy server does not need to store the key or reveal the *** the same time,the proxy server cannot obtain any valuable information in the *** paper formalizes the concept of MC-PBRE and its security model,and proposes a MC-PBRE scheme of ciphertext ***,the scheme security has been proved in the random oracle.

关键词： Proxy re-encryption sensor network security broadcast re-encryption

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Broadband Chaos Generation from Relaxation Oscillation-Free Polarization Mode of Vertical-Cavity Surface-Emitting Laser

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Guangxue Xuebao/Acta Optica Sinica 2025年第10期45卷

作者： Di, Chengzhen Liu, Qi Wang, Longsheng Zhao, Qingchun Guo, Yuanyuan Chang, Pengfa Jia, Zhiwei Wang, Anbang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Shanxi Taiyuan030024 China College of Electronic Information and Optical Engineering Taiyuan University of Technology Shanxi Jinzhong030600 China Key Laboratory of Precision Measurement Physics Ministry of Shanxi Province Taiyuan University of Technology Shanxi Taiyuan030024 China School of Computer and Communication Engineering Northeastern University at Qinhuangdao Hebei Qinhuangdao066004 China Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education Guangdong University of Technology Guangdong Guangzhou510006 China

Objective Secure communication based on chaotic lasers has gained significant attention in recent years due to its high speed and compatibility with existing fiber-optic networks. Vertical-cavity surface-emitting lasers (VCSELs) are promising candidates, offering a compact structure and low power consumption. However, VCSELs are constrained by chaotic bandwidth limitations induced by relaxation oscillations, which reduce the secure transmission rate. Existing methods for broadening the chaos bandwidth often rely on complex external perturbations, which may hinder system synchronization. We propose a simplified method for generating broadband chaos by utilizing the relaxation-oscillation-free polarization mode of VCSELs. Methods We present a novel approach for generating broadband chaos by utilizing the relaxation-oscillation-free polarization mode of VCSELs. The experimental setup (Fig. 1) employs a custom single-mode VCSEL with a wavelength of 1550 nm and no internal isolator. The laser is powered by a low-noise current source and is equipped with precise temperature control to ensure stable operation. Optical feedback is provided via a fiber mirror, with its intensity regulated by a variable optical attenuator. Polarization controllers are used to align the feedback polarization, directing X mode feedback to the X mode and Y mode feedback to the Y mode. The output signals are separated into X+Y, X, and Y modes using polarization beam splitters. The spectral, temporal, and dynamic properties of the VCSEL are analyzed using an optical spectrum analyzer, a high-speed oscilloscope, and an electrical spectrum analyzer. Key parameters, including bias current and feedback strength, are systematically varied and optimized to investigate their effects on chaos generation, with the aim of identifying the optimal conditions for achieving broadband chaos with the desired characteristics. Results and Discussions We begin with an in-depth analysis of the free-running VCSEL to e

关键词： Optical feedback

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measurement of non-Abelian gauge fields using multiloop amplification

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Physical Review A 2023年第2期108卷 023316-023316页

作者： Qing-Xian Lv Hong-Zhi Liu Yan-Xiong Du Lin-Qing Chen Meng Wang Jia-Hao Liang Zhao-Xin Fu Zi-Yuan Chen Hui Yan Shi-Liang Zhu Key Laboratory of Atomic and Subatomic Structure and Quantum Control (Ministry of Education) School of Physics South China Normal University Guangzhou 510006 China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong-Hong Kong Joint Laboratory of Quantum Matter South China Normal University Guangzhou 510006 China Guangdong Provincial Engineering Technology Research Center for Quantum Precision Measurement Frontier Research Institute for Physics South China Normal University Guangzhou 510006 China

Non-Abelian gauge field plays a central role in understanding the geometrical and topological phenomena in physics. Here we experimentally induce a non-Abelian gauge field in the degenerate eigensubspace of a double-Λ four-level atomic system. The non-Abelian nature of the gauge field is detected through the measurement of the noncommutativity of two successive evolution loops. Then we theoretically propose and experimentally demonstrate a scheme to measure the non-Abelian gauge field through multiloop evolution and robust holonomic quantum gates. The demonstrated scheme offers the advantage of detecting the non-Abelian gauge field with amplification through multiloop evolution. Our results pave the way for an experimentally feasible approach to achieving high-resolution and high-precision measurements of the gauge fields.

关键词： Coherent control Cooling & trapping Geometric & topological phases Light-matter interaction Photocurrent Quantum control Quantum foundations Quantum simulation Synthetic gauge fields

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