Internal Model Control of Lightly Damped Systems Subject to Periodic Exogenous Signals

Lu, Yu-Sheng

doi:10.1109/tcst.2009.2023672

Cited by 16 publications

(6 citation statements)

References 9 publications

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“…This figure also shows a curvefitting result for obtaining a mathematic model. Here, the tracking actuator is modeled as with identified parameter values: , rad/s, and (Lu, 2010). In this study, the sampling frequency of the tracking servo is 195.31 kHz.…”

Section: Plant Under Studymentioning

confidence: 99%

Sliding repetitive control with adaptive bound estimation for motion systems liable to periodic exogenous signals

Lu¹,

Lin

2021

JER is an international, peer-reviewed journal that publishes f

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Periodic exogenous signals often exist in motion systems, especially those involving one or more rotating elements. These periodic exogenous signals deteriorate the performance of motion systems, and these adverse effects cannot be practically eliminated by straightforwardly increasing feedback control gains due to sensor noise, actuator saturation, and unmodeled plant dynamics. This paper describes a sliding repetitive controller for motion systems subject to periodic exogenous signals. Moreover, an adaptive law for bound estimation is devised to ensure the presence of a sliding motion for both repetitive learning and disturbance observation. The tracking motion system of a disk drive is considered in practice, and a traditional repetitive controller is also implemented for performance comparisons with the proposed scheme. Experimental results are reported in this paper, showing the efficacy of the proposed scheme.

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Section: Plant Under Studymentioning

confidence: 99%

Sliding repetitive control with adaptive bound estimation for motion systems liable to periodic exogenous signals

Lu¹,

Lin

2021

JER is an international, peer-reviewed journal that publishes f

Self Cite

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“…The Internal Model Control (IMC) arrangement was first introduced and carefully studied by Garcia and Morari [21]. Its design and performance under periodic disturbances were studied in [22] and its application to first order systems with time-delay was studied by Vyhlidal and Zitek in [23], see also [24]. Due to its structure, IMC clarifies the external disturbance acting on the system and lets the controller decide its control action directly with respect to the reference and disturbance signal.…”

Section: Internal Model Control Based Schemementioning

confidence: 99%

Internal Model Controller to Attenuate Periodic Disturbance of a First-Order Time-Delay System

Yuksel

Bušek

Niculescu

et al. 2021

2021 European Control Conference (ECC)

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A controller design based on the internal model control principle is introduced as an alternative to the repetitive control structure to attenuate the periodic disturbance. Such a disturbance phenomenon is observed for example in hot rolling mills due to roll eccentricity and is considered here as a motivation example. The emphasis is on the analytic design of the filter and on the time-delay parameter within the controller. By these two components, the controller action is tuned to achieve a zero gain and synchronized time shift to compensate completely the periodic disturbance. The overall procedure is validated by simulations on a model identified from real process data.

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“…W ITH the constant seeking of precision and efficiency, a large number of flexible systems have been put into industrial production, ranging from the read/write heads of computer hard disks to all kinds of spacecraft, such as Space telescopes with Solar array or high-gain antennas [1], [2], [3], [4], large truss structure satellites [5], etc. The uncertainties of flexible systems include structural uncertainties and nonstructural uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Robust H-Inf Phase Control for Flexible System With Weak Damping

Pang

Meng

et al. 2020

IEEE Access

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The characteristic of a flexible system with weak damping is that the amplitude characteristics show a large change, and the situation on the Nyquist chart is extremely complicated. Due to the existence of weak damping, the perturbation range of the flexible modal parameters allowed by the system is greatly compressed, and the robust stability is reduced, which brings challenges to the control design. To deal with this problem, the traditional H-inf loop shaping method often leads to the controller instability and poor robustness. In order to improve the stability margin of the system, increase the robustness and stability, and solve the problem of the instability of H-infcontrollers, this paper proposes a robust comprehensive design method based on phase control. In this method, by using the closed-loop pole configuration corresponding to the flexible mode at low frequency, the phase control is realized. Through the phase control, the apex of the Nyquist curve of the weakly damped mode of the system is limited to the Right half plane. The H-inf weighting function relaxes the pole configuration requirements, reduces the conservativeness of strict positive real, and combines the phase control with the H-inf optimization solution to obtain a robust and self-stable H-inf controller. A specific design example is given. The simulation results show that this control method has extremely high robustness. This design example can provide a certain degree of robust design for other weakly damp.

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Internal Model Control of Lightly Damped Systems Subject to Periodic Exogenous Signals

Cited by 16 publications

References 9 publications

Sliding repetitive control with adaptive bound estimation for motion systems liable to periodic exogenous signals

Sliding repetitive control with adaptive bound estimation for motion systems liable to periodic exogenous signals

Internal Model Controller to Attenuate Periodic Disturbance of a First-Order Time-Delay System

Robust H-Inf Phase Control for Flexible System With Weak Damping

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