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33rd Chinese Control and Decision Conference (CCDC)

作者： Zhang, Yang Su, Mao Cheng, Zhongtao Liu, Lei Wang, Bo Huazhong Univ Sci & Technol Sch Artificial Intelligence & Automat Natl Key Lab Sci & Technol Multispectral Informat Wuhan 430074 Peoples R China Hubei Space Technol Acad Designing Inst Wuhan 100074 Peoples R China

ISBN: (纸本)9781665440899

Aiming at the attitude control problem of flying-wing UAV, an adaptive super-twisting non-singular fast terminal sliding mode control law is proposed. Flying-wing UAVs are pool in static stability due to the cancellation of the flat tail and vertical tail, which brings great challenges to the attitude control of flying-wing UAVs. Therefore, the non-singular fast terminal sliding mode control method is used for control. At the same time, using the improved super-twisting algorithm to attenuate the chattering, an adaptive super-twisting non-singular fast terminal sliding mode control law is designed: the finite-time convergence of the closed-loop system is proved using Lyapunov stability theory;Finally, through simulation analysis, it is proven that the adaptive super-twisting non-singular fast terminal sliding mode control law proposed in this paper has a better control effect. Compared with the traditional sliding mode method, the control is smoother and can suppress disturbance effectively and weaken chattering.

关键词： nonsingular fast terminal sliding mode fixed-wing UAV control super-twisting algorithm finite time convergence Attitude control

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Adaptive super-twisting Guidance Law with Extended State Observer 47

Adaptive Super-Twisting Guidance Law with Extended State Obs...

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47th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Kumar, Sunil Sharma, Rahul Kumar Kamal, Shyam Indian Inst Technol BHU Dept Elect Engn Varanasi Uttar Pradesh India

ISBN: (纸本)9781665435543

This paper proposes a guidance law based on super-twisting algorithm with adaptive gains. Planar geometry of missile-target engagement has been considered. With the proposed scheme, the Line-Of-Sight (LOS) rate converges to zero within finite time. The guidance law is designed considering the uncertainty associated with the maneuvering and non-maneuvering target. Further, the unknown target acceleration is estimated by using an extended state observer. The estimated information of the uncertain target acceleration is utilized in the design. Simulation results for a numerical example are presented which show satisfactory performance of the designed law.

关键词： Guidance Law Finite-Time Convergence super-twisting algorithm Adaptive Tuning Extended State Observer

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State-of-Charge and State-of-Energy Estimation for Lithium-ion Batteries Using Sliding-Mode Observers 40

State-of-Charge and State-of-Energy Estimation for Lithium-i...

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40th Chinese Control Conference (CCC)

作者： Feng, Yong Bai, Fan Xue, Chen Han, Fengling Harbin Inst Technol Harbin 150001 Peoples R China RMIT Univ Melbourne Vic 3000 Australia

ISBN: (纸本)9789881563804

Based on the equivalent circuit model of a lithium-ion battery, this paper proposes a sliding mode observer for its State-of-Charge (SoC) estimation. In order to further estimate the State-of-Energy (SoE) of lithium-ion batteries, a real-time SoE estimation algorithm is established using the super-twisting technique. The Lyapunov stability theory is utilized to prove the proposed SoC and SoE estimation algorithms. Finally, the experimental data of Dynamic Stress Test (DST) and Federal Urban Driving Schedule (FUDS) test verify the accuracy and robustness of the proposed SoC and SoE estimation algorithms.

关键词： Lithium-ion battery State-of-Charge State-of-Energy Sliding mode observer super-twisting algorithm

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Sliding Mode Disturbance Observer-Based Adaptive Dynamic Inversion Fault-Tolerant Control for Fixed-Wing UAV

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DRONES 2022年第10期6卷 295-295页

作者： Dong, Zhe Liu, Kai Wang, Shipeng Dalian Univ Technol Sch Aeronaut & Astronaut Dalian 116024 Peoples R China Shenyang Aircraft Design & Res Inst Shenyang 110034 Peoples R China

Unmanned aerial vehicles (UAVs) have been widely applied over the past decades, especially in the military field. Due to the unpredictability of the flight environment and failures, higher requirements are placed on the design of the control system of the fixed-wing UAV. In this study, a sliding mode disturbance observer-based (SMDO) adaptive dynamic inversion fault-tolerant controller was designed, which includes an outer-loop sliding mode observer-based disturbance suppression dynamic inversion controller and an inner-loop real-time aerodynamic identification-based adaptive fault-tolerant dynamic inversion controller. The sliding mode disturbance observer in the outer-loop controller was designed based on the second-order super-twisting algorithm to alleviate chattering. The aerodynamic identification in the inner-loop controller adopts the recursive least squares algorithm to update the aerodynamic model of the UAV online, thereby realizing the fault-tolerant control for the control surface damage. The effectiveness of the proposed SMDO enhanced adaptive fault-tolerant control method was validated by mathematical simulation.

关键词： unmanned aerial vehicle disturbance suppression control aerodynamic identification recursive least squares super-twisting algorithm chattering reduction control surface damage

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Backstepping super-twisting for Robotic Manipulators with Matched and Unmatched Uncertainties 18

Backstepping Super-Twisting for Robotic Manipulators with Ma...

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18th International Multi-Conference on Systems, Signals & Devices (SSD)

作者： Kali, Yassine Saad, Maarouf Benjelloun, Khalid Ecole Technol Super Dept Elect Engn Montreal PQ H3C 1K3 Canada Univ Mohammed 5 Ecole Mohammadia Ingenieurs Rabat Morocco

ISBN: (纸本)9781665414937

This work investigates the problem of controlling robot manipulators with matched and mismatched uncertainties. To this end, a robust backstepping combined with super-twisting controller is developed to guarantee the convergence of the joint position states to their desired references. The proposed control technique allows the rejection of the uncertainties while eliminating the sliding mode's famous drawback that is the chattering. Based on recursive Lyapunov function, sufficient condition is set to ensure the closed-loop system stability. Finally, simulation and experimental works were carried out respectively on a two degrees-of-freedom robot model and on the seven degrees-of-freedom ANAT modular robot to verify the performance and the robustness of the developed control strategy.

关键词： Backstepping super-twisting algorithm Matched and unmatched uncertainties Robotic Manipulators Trajectory tracking Lyapunov

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Sliding Mode Observers Combined with Locked Loop Techniques for Sensorless Vector Controlled Synchronous Reluctance Machines 19

Sliding Mode Observers Combined with Locked Loop Techniques ...

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IEEE 19th International Power Electronics and Motion Control Conference (PEMC)

作者： Pavlic, Ivana Pravica, Luka Kutija, Martina Erceg, Igor Matusko, Jadranko Univ Zagreb Fac Elect Engn & Comp Dept Elect Machines Drives & Automat Zagreb Croatia

ISBN: (纸本)9781728156606

This paper presents a comparative study of four different rotor position and speed estimation methods for sensorless vector control of synchronous reluctance machines (SynRMs). The estimation methods are based on the active-flux concept, the different sliding-mode observers (SMOs) and locked loops. For SMO control vectors, a signum function and a super- twisting algorithm in. used. The SMOs arc combined with phase-locked mop (PLL) and dual second-order generalized integrator frequency-locked loop (DSOGI-FLL) for position and speed extraction from observed active flux derivatives. The methods are verified and compared by simulation tests in MATLAB Simulink. The saturable SynRM model Is used, and parameter sensitivity analysis is performed.

关键词： synchronous reluctance machine (SynRM) sensorless control vector control sliding mode observer (SMO) super-twisting algorithm phase-locked loop (PLL) second-order generalized integrator (SOGI)

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Research on Voltage Stabilization Method of Power System with Constant Power Load

Research on Voltage Stabilization Method of Power System wit...

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第35届中国控制与决策会议

作者： Yifan Jia Zhen Liu Yongliang Ni Keling Song Yufei Qi College of Information Science and Engineering Northeast University China Northern Vehicle Research Institute

In order to solve the phenomenon of bus voltage resonance instability caused by the negative impedance characteristics of constant power load in DC power system,a sliding mode controller based on overtorsion algorithm was ***,the space state equation of the converter is derived according to the switching state of the converter,and a sliding surface is created using the error between the inductor current and the output voltage of the ***,the convergence and stability of the sliding mode are judged by combining the super twisting algorithm with Lyapunov ***,the simulation software Matlab/Simulink is used to verify the *** experimental results show that the controller has a robust and fast dynamic response to the external interference of the load side and the source converter side.

关键词： DC power system constant power load sliding mode control super-twisting algorithm

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Continuous super-twisting Observer-Based super-twisting Control of Euler-Lagrange Systems 14th

Continuous Super-Twisting Observer-Based Super-Twisting Cont...

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14th International Conference on Intelligent Robotics and Applications (ICIRA)

作者： Cao, Guizhou Shi, Huige Zhang, Xiaoke Zhu, Zheran Liu, Yanhong Yu, Hongnian State Grid Henan Elect Power Res Inst Zhengzhou 450052 Peoples R China Zhengzhou Univ Sch Elect Engn Zhengzhou 450001 Peoples R China State Grid Nanyang Elect Power Supply Co Nanyang 473000 Peoples R China State Grid Jiaozuo Elect Power Supply Co Jiaozuo 454100 Henan Peoples R China Edinburgh Napier Univ Sch Engn & Built Environm Edinburgh Midlothian Scotland

ISBN: (纸本)9783030890957;9783030890940

Higher-order observer-based robust controllers are commonly applied to Euler-Lagrange (EL) systems in presence of unavoidable uncertainties and unmeasurable states. However, the controllers are constructed by an assumption of differential system uncertainties, which constrains the physical applications disrupted by non-differentiable noises, such as discontinuous signals. This paper proposed a continuous observer-based sliding mode controller by utilizing the super-twisting algorithm (STA) and an integral sliding mode surface, and the condition of uncertainties is relaxed to be bounded. First, an improved STA-based observer is employed to estimate system states and adaptively compensate system uncertainties. Second, a novel integral sliding mode surface is employed to design a continuous STA-based controller for EL systems in presence of uncertainties without knowledge of upper bound in prior. The proposed controller relaxes the differential uncertainties to be bounded, achieve continuous inputs and improve system robustness. Finally, numerical simulations verify the effectiveness of the proposed controller.

关键词： Euler-lagrange system Sliding model control super-twisting algorithm Observer-based controller

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Nonsingular fast terminal control for the DFIG-based variable-speed hydro-unit

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ENERGY 2022年第PartA期244卷 122672-122672页

作者： Fu, Jianing Yu, Xiangyang Gao, Chunyang Cui, Junda Li, Youting Xian Univ Technol Xian 710054 Peoples R China State Grid Beijing Fengtai Power Supply Co Beijing 100073 Peoples R China State Grid Shaanxi Elect Power Co Xianyang Power Supply Co Xianyang 712000 Peoples R China

Pumped storage power plants (PSPPs) with variable-speed hydro-units are credible when tackling the impact caused by the introduction of renewable energy into grids. However, the units suffer from instability when the grid transients occur because the adopted doubly-fed induction generators (DFIG) have a strong coupling and nonlinearity. Conventional controllers failed to handle this situation. Although the sliding mode controller (SMC) is robust enough, it has problems of infinite convergence time and chattering issues. Nonsingular fast terminal sliding mode controller (NFTSMC) an advanced SMC is a promising method to solve these problems. This paper took the DFIG-based variable-speed hydro-unit as the studied object and adopted a newly-designed NFTSMC in the rotor side converter to secure the stable operation of the unit. Especially, a feedback control law and a modified coefficient of the sliding mode surface were combined with the adaptive super-twisting algorithm to handle the additional information of the derivatives of the sliding mode surface and guarantee the theoretical stability. Simulations under load rejection, parameter variation, voltage dips were imposed on the unit. Results showed the proposed controller has lower settling times, oscillations, and less over-shooting. The effi-ciency of the proposed controller is thus proved. (c) 2021 Elsevier Ltd. All rights reserved.

关键词： DFIG Variable speed hydro-unit Nonsingular fast terminal sliding mode control super-twisting algorithm

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Simultaneous state and parameter estimation method for a conventional ozonation system

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COMPUTERS & CHEMICAL ENGINEERING 2022年 167卷

作者： Chairez, Isaac Chalanga, Asif Poznyak, Alex Spurgeon, Sarah Poznyak, Tatyana Tecnol Monterrey Inst Adv Mat Sustainable Mfg Zapopan Jalisco Mexico Inst Politecn Nacl UPIBI Mexico City Mexico UCL Dept Elect & Elect Engn London WC1E 7JE England Ctr Invest & Estudios Avanzados Automat Control Dept Mexico City Mexico Inst Politecn Nacl Escuela Super Ingn & Quim Ind Extract SEPI Mexico City Mexico

This article presents a simultaneous state (via a nonlinear form of Luenberger observer) and parameter (using a proportional-integral least mean square form) estimator design method for a conventional ozonation system. The suggested state observer assumes that the only available output signal is the concentration of the ozone gas at the output of the reactor. The estimation of the reaction rate constants of ozonation in the presence of contaminants uses the suggested proportional-integral estimation method. The convergence proof of the developed state-parameter identification method was confirmed using a Lyapunov based stability analysis. This analysis characterizes the quality of estimation considering the presence of modeled uncertainties and external perturbations. The implementation of the super-twisting algorithm as a robust and exact differentiator allowed to perform the estimation of the reaction rate constants of the ozonation, the temporal evolution of the dissolved ozone and the evolution of contaminants concentrations. The simultaneous state and parameter estimator design method was implemented in real-time using phenol as a model contaminant. The numerically simulated and real-time implementations showed that the method provides accurate estimates of the contaminant concentration and the reaction rate coefficient in all the evaluated cases.

关键词： Conventional ozonation super-twisting algorithm Proportional-integral parametric identifier Simultaneous state-parameter estimator

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