Speed control for K-mirror of 2-m telescope using improved active disturbance rejection controller

Deng, Yongting; Xia, Peipei; Li, Hongwen; Xian-Jun, Wang

doi:10.1016/j.measurement.2018.07.023

Cited by 8 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has a higher anti-disturbance ability [8], [9], but it increases the complexity of the control structure and necessitates the use of additional inertial sensors. The ADRC method extends the total disturbance to the state equation for estimation and compensation without the use of additional sensors, but it has more parameters and is more difficult to design [10], [11]. LQR obtains the optimal control law of state linear feedback, from which a closed-loop optimal control can be easily formed.…”

Section: Introductionmentioning

confidence: 99%

Disturbance Identification and Adaptive Compensation Method in Optical Target Tracking System

Xia,

Deng,

Nie

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

External disturbance suppression is critical in highprecision optical target tracking systems. Although the traditional disturbance observation compensator (DOBC) method can improve anti-disturbance performance, its fixed structure limits its ability to handle variable disturbances. To improve the suppression ability of time-varying narrowband disturbances, we propose a disturbance identification and adaptive compensation method based on DOBC (DIAC-DOBC). The peak frequency of the observed disturbance can be obtained with high precision using AR parameter model identification. To design the Q filter, an improved notch filter structure is proposed, with parameters that can be adjusted automatically and a stronger suppression ability. Furthermore, the conditions for closed-loop stability and robust stability are detailed. Finally, the method's effectiveness is demonstrated through simulation and actual experimentation on an optical target tracking system with disturbances.

show abstract

Section: Introductionmentioning

confidence: 99%

Disturbance Identification and Adaptive Compensation Method in Optical Target Tracking System

Xia,

Deng,

Nie

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…For example, the active disturbance rejection controller (ADRC) is designed based on the classical feedback control framework. With the help of tracking differentiator, feedback control law, and the extended state observer (ESO), the ADRC controller can resist the internal uncertainty (e.g., the nonlinearity of the system) and the external disturbance (e.g., the wind disturbance) (Qiu et al 2014;Ranka et al 2015;Guo et al 2016;Feng & Guo 2017;Deng et al 2018;Li et al 2019). However, as the core of ADRC controller, the ESO can only estimate rough disturbance signal and is very sensitive to parameter tuning since it is not designed based on the system's model.…”

Section: Introductionmentioning

confidence: 99%

Disturbance Observer-based Pointing Control of Leighton Chajnantor Telescope

Chen,

Wang

2023

Res. Astron. Astrophys.

View full text Add to dashboard Cite

Leighton Chajnantor Telescope (LCT), i.e., the former Caltech Submillimeter Observatory (CSO) telescope, will be refurbished at the new site in Chajnantor Plateau, Chile, in 2023. The environment of LCT will change significantly after its relocation, and the telescope will be exposed to large wind disturbance directly because its enclosure will be completely open during observation. The wind disturbance is expected to be a challenge for LCT’s pointing control since existing control method cannot reject this disturbance very well. Therefore, it is very necessary to develop a new pointing control method with good capability of disturbance rejection. In this research, a disturbance observer - based composite position controller (DOB-CPC) is designed, in which an H∞ feedback controller is employed to compress the disturbance, and a feedforward linear quadratic regulator is employed to compensate the disturbance precisely based on the estimated disturbance signal. Moreover, a controller switching policy (CSP) is adopted, which applies the proportional controller to the transient process to achieve a quick response and applies the DOB-CPC to the steady state to achieve a small position error. Numerical experiments are conducted to verify the good performance of the proposed pointing controller (i.e., DOB-CPC) for rejecting the disturbance acting on LCT.

show abstract

“…The PID controller has the feature of simple structure, easy tuning, and independence of the controlled plant model, although there are limitations in its performance. Some advanced control schemes are also researched, such as adaptive control [5], sliding control [15], H∞ method [16], LQG method [17] and active disturbance rejection control [18][19][20], etc.…”

Section: Introductionmentioning

confidence: 99%

Identification and control of the motor‐drive servo turntable with the switched friction model

Zhang

Wang²,

Ninghao

2020

IET Electric Power Applications

View full text Add to dashboard Cite

In this study, the identification and control scheme of the motor-drive servo turntable are researched to achieve accurate tracking. Firstly, the input-output identification experiments are designed and realised for the global model of motordrive servo turntable. The order of the global controlled auto-regressive model is determined by the Akaike information criterion, and the parameters are estimated by a particle swarm optimisation-cuckoo search algorithm. Secondly, the switched friction model is built combining the LuGre structure and the Stribeck curve. The switching conditions and the parameters of the switched friction model are determined though the input-output and the friction experiments. A constrained multi-objective optimisation problem is constructed for the parameter identification of the switched friction model. It is solved via a fuzzy comprehensive evaluation. Finally, the composite control strategy, in which the proportional-integral-derivative controller and model-based friction observer are combined, is proposed in the azimuth angle system of the motor-drive servo turntable. The trajectory tracking results in simulation and experiment illustrate the effectiveness of the proposed switched model, identification method, and composite control strategy.

show abstract

Speed control for K-mirror of 2-m telescope using improved active disturbance rejection controller

Cited by 8 publications

References 17 publications

Disturbance Identification and Adaptive Compensation Method in Optical Target Tracking System

Disturbance Identification and Adaptive Compensation Method in Optical Target Tracking System

Disturbance Observer-based Pointing Control of Leighton Chajnantor Telescope

Identification and control of the motor‐drive servo turntable with the switched friction model

Contact Info

Product

Resources

About