Methods for on-line process identification in closed loop

Kurz, H.; Isermann, Rolf

doi:10.1016/s1474-6670(17)67649-3

Cited by 16 publications

(2 citation statements)

References 8 publications

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“…e main problem is that the estimator will wind-up and the estimation results are unsatisfactory when there is no or little excitation [9]. ere are three main methods to solve this problem: (1) providing additional excitation; (2) double controllers [10,11]; and (3) ensuring that the estimator works when the excitation is enough [12][13][14]. e first method is the simplest, but it cannot achieve satisfactory results.…”

Section: Introductionmentioning

confidence: 99%

Current Driver Design for Electromagnetic Coil Using Adaptive Active Disturbance Rejection Control

Zhu

Rui

Yang

et al. 2021

Shock and Vibration

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An adaptive active disturbance rejection controller is used in the current driver design of the electromagnetic coil. Extended state observer of the 1st-order system is adopted for disturbance observation of ADRC. The supervised recursive least squares method is proposed for real-time parameters estimation, in which the excitation signal variance is used to trigger the parameter estimator. The experimental results demonstrate that ADRC combined with real-time parameter estimation simplifies the parameter tuning and improves the parameter adaptive ability.

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Section: Introductionmentioning

confidence: 99%

Current Driver Design for Electromagnetic Coil Using Adaptive Active Disturbance Rejection Control

Zhu

Rui

Yang

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…With the consistent estimates of , a G , b G and c H (i"1, 2 , n; j"1, 2 , m) the consistent estimate of parameters d H in the polynominal D(z\) can be determined by using equation (7). The procedures presented above can be summed up as the following identification algorithm.…”

mentioning

confidence: 99%

Identification of closed-loop systems via least-squares method

Zhang

Feng

1998

Int. J. Adapt. Control Signal Process.

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SUMMARYIn this paper, a modified least-squares method is proposed to treat the problem of identifying closed-loop systems in the presence of coloured noises. Using the information obtained by the standard least-squares (LS) method, some linear equality constraints of the estimated parameters are derived for extracting the estimation bias from the LS estimates. With the bias removed, consistent parameter estimates are obtained. It is shown that the presented method can achieve consistent parameter estimation without the modelling of the noises. The theoretical analysis is verified by numerical examples.1998 John Wiley & Sons, Ltd.

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On-line Identification in Closed Loop

Isermann¹

1991

Digital Control Systems

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Methods for on-line process identification in closed loop

Cited by 16 publications

References 8 publications

Current Driver Design for Electromagnetic Coil Using Adaptive Active Disturbance Rejection Control

Current Driver Design for Electromagnetic Coil Using Adaptive Active Disturbance Rejection Control

Identification of closed-loop systems via least-squares method

On-line Identification in Closed Loop

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