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Article
Automation & Control Systems
Fanglai Zhu et al.
Summary: In this paper, a novelty unknown input observer (UIO) is proposed for a linear system with unknown input, which can achieve asymptotic system state estimation and unknown input reconstruction simultaneously via interval observer. The interval estimation of the output vector is obtained by designing an interval observer under the assumption that the boundary of the unknown input is known. Then, an algebraic relationship between the unknown input and the system state is established based on the upper and lower boundary estimations of the output vector. A Luenberger-like state observer together with an algebraic unknown input reconstruction is designed to form a UIO based on the algebraic relationship. Furthermore, a UIO is applied directly on a time-delay system with unknown input, demonstrating the advantages of the proposed UIO. Simulation examples and comparisons to existing results are provided to illustrate the effectiveness and advantages of the proposed method.
Article
Automation & Control Systems
Wenwu Zhu et al.
Summary: This article studies the sensorless speed regulation problem for a surface-mount permanent magnet synchronous motor system. A new nonsmooth observer scheme is proposed to estimate the rotor position, speed, and lumped disturbance of the system. Based on the estimated information, a composite speed controller is designed using the nonsmooth control technique in the feedback design and the estimated value of disturbance in the feedforward compensation. Rigorous analysis using Lyapunov theory guarantees the stability of the closed-loop system and shows that the proposed method enhances the disturbance rejection property of the system. Simulation tests and experiment results verify the effectiveness of the proposed method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Jorge Davila et al.
Summary: This note presents a finite-time observer for a class of linear time-varying systems with bounded unknown inputs. The observer design utilizes the structural properties of the system and applies the robust exact differentiator in a block form through a linear operator, eliminating the need for additional stabilizing terms. The proposed observer provides an exact estimate of the states after a finite transient time despite the potential instability of the system and the effects of bounded unknown inputs.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Automation & Control Systems
Mojtaba Mansouri Boroujeni et al.
Summary: This article introduces two control strategies, average-model based (AMB) and energy-based (EB) control methods, for controlling a monoinverter dual parallel surface-mounted permanent magnet synchronous motor (MIDP-PMSM) with different parameters. The proposed EB control method shows better performance compared to the AMB control method, as demonstrated by mathematical analysis, MATLAB simulation, and experimental implementation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jungho Lee et al.
Summary: This study presents a maximum torque per ampere control method for a mono inverter dual parallel surface-mounted permanent-magnet synchronous motor drive system. The method achieves efficiency-optimizing operation using an angle difference controller and can easily obtain the optimal angle difference regardless of parameter errors.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Yanzhen Shao et al.
Summary: A two-degree-of-freedom structure-based backstepping observer (TSBO) is proposed in this article to improve the accuracy and frequency-domain response of the BEMF observer for sensorless PMSM drives. By introducing a second-order complex vector transfer function, the TSBO achieves bandpass characteristics without the need for an extra filter.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Tianyi Liu et al.
Summary: This article proposes a method for designing a robust controller for parallel PMSM systems, first constructing a T-S fuzzy model, then introducing a nonlinear feedforward controller, and combining GCC techniques with H-infinity stability analysis methods to achieve zero-error speed tracking and external load rejection. Experimental results demonstrate that the proposed method can reduce the unstable risk of parallel PMSM systems consisting of different machines.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Zdenek Novak et al.
Summary: This article presents an adaptive quadrature phase-locked loop (AQPLL) for improving the dynamic performance of sensorless high-speed permanent magnet synchronous motors (PMSMs). The AQPLL can start to operate with a low bandwidth and adapt the bandwidth in real time, leading to quick reduction of position estimation error and higher torque. Experimental results confirm the effectiveness of the method for achieving a high-performance sensorless field-oriented control of high-speed PMSMs.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Badriah Alenezi et al.
Summary: A state observer and unknown input and output disturbance estimators are proposed for discrete-time linear systems corrupted by bounded unknown inputs and output disturbances, with guaranteed l(infinity)-stability of estimation errors and prescribed performance level. The design is based on linear matrix inequalities and can be applied for detecting adversarial attacks on communication channels in control systems.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2021)
Article
Engineering, Electrical & Electronic
Gang Liu et al.
Summary: This article investigates the position-estimation deviation issue of sensorless drive method based on SMO and PLL, and proposes a technology combining phase self-compensation SMO and feed-forward PLL to effectively address the problem.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Tae-Il Yeam et al.
Summary: In this article, a novel sliding mode speed controller is proposed for the parallel operation of dual PMSMs. The controller consists of a speed controller for the master PMSM and a damping controller for stable operation. The feasibility of the proposed control scheme has been verified by simulation and experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Giuseppe Conte et al.
Summary: This paper considers the problem of designing an asymptotic observer for a given function of the state of a switching linear system in the presence of unknown inputs. It studies solvability in cases of sufficiently large dwell time and dwell time greater than a fixed threshold, providing a complete characterization of solvability in terms of necessary and sufficient conditions in both scenarios. The methodology used in this study utilizes geometric concepts to reveal the structural aspects of the problem and derive its solutions.
Article
Engineering, Electrical & Electronic
Tianyi Liu et al.
Summary: The article introduces a new maximum torque per ampere (MTPA) control strategy for multi-permanent magnet synchronous motor systems, showing feasibility, stability, and efficiency improvements in experiments.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Mukai Zhang et al.
Summary: Digital estimators proposed for networked systems provide a solution to independent sparse malicious packet drop errors affecting plant output measurements and control signals. The study shows that for certain continuous-time systems, the existence condition for unknown input observers (UIOs) can still be guaranteed after discretization.
IEEE CONTROL SYSTEMS LETTERS
(2021)
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Jiancheng Zhang et al.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2020)
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Imane Sakhraoui et al.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2020)
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Jianglin Lan
Review
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Gaolin Wang et al.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2020)
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Wei Xu et al.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2019)
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Donglai Liang et al.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2018)
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Yongjian Hou et al.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2018)
Article
Engineering, Electrical & Electronic
Qipeng Tang et al.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2017)
Article
Automation & Control Systems
Yongjae Lee et al.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2015)
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Automation & Control Systems
Xiaohong Nian et al.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2015)
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Automation & Control Systems
Fanglai Zhu
JOURNAL OF PROCESS CONTROL
(2012)
Article
Automation & Control Systems
Frederic Mazenc et al.
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D. Bidart et al.
IET ELECTRIC POWER APPLICATIONS
(2011)
Article
Automation & Control Systems
Karanjit Kalsi et al.
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H. Trinh et al.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2008)
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C Edwards et al.
