A Novel Disturbance Observer for Multiagent Tracking Control with Matched and Unmatched Uncertainties

Zhao, Xin; Ma, Xiaojun; Ma, Xiao

doi:10.1155/2019/9765353

Cited by 2 publications

(2 citation statements)

References 35 publications

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“…By using a disturbance observer, chattering can be weakened. The switching function gain k can be reduced to the upper bound of the observation error, which can realize the suppression of chattering [44,51].…”

Section: Stability Analysismentioning

confidence: 99%

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Shang

2022

Electronics

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Constant power loads have negative impedance characteristics, which reduce the damping of DC/DC converter systems and have negative effects on the stability of the DC microgrid. In this paper, a finite-time parameter observer-based sliding mode controller is proposed for a boost converter with constant power loads. Firstly, a non-singular terminal sliding-mode controller is designed based on the flatness of the differential and sliding mode control theory. Secondly, a finite-time observer is designed to estimate the input voltage and tunes the parameter of the controller in time. Thirdly, the finite-time stability of the closed-loop system is proved through the proposed controller. Finally, the effectiveness and robustness of the proposed controller with unknown input voltage are verified by simulation. The proposed controller can guarantee finite-time convergence without input voltage sensors, which can reduce system cost and improve system reliability.

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Section: Stability Analysismentioning

confidence: 99%

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Shang

2022

Electronics

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“…However, these design results can only realize disturbance attenuation but not disturbance rejection. In order to improve closed-loop control performance, the disturbance observerbased control [23][24][25][26][27][28][29][30][31] and active disturbance rejection control [32][33][34][35][36][37][38][39] have been developed for drag-free satellite to pursue more ideal control system performance [25,[40][41][42][43][44][45][46][47][48][49][50]. However, how to design a suitable observer to estimate the disturbances more precisely is still an open and attractive problem [51].…”

Section: Introductionmentioning

confidence: 99%

Relative Position Model Predictive Control of Double Cube Test-Masses Drag-Free Satellite with Extended Sliding Mode Observer

Wang

Zhang

et al. 2021

Mathematical Problems in Engineering

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The drag-free satellites, being space-borne ultrahigh precise measurement platforms, have played irreplaceable roles in a great number of space science missions such as navigation, earth science, fundamental physics, and astrophysics. Most of these missions have to be performed based on the satellites placed with double cube test-masses, which makes the satellite layout and control strategy be more complex. This paper investigates the orbit keeping control problem of a class of low Earth orbit drag-free satellites with double cube test masses. A disturbance observer-based composite control method is proposed, which consists of an extended sliding mode observer and the tube-based robust model predictive control approach. In this design, the observer is proposed to estimate the relative position and velocity of the satellite and the external space disturbance force. A tube-based robust model predictive control scheme is then developed to stabilize the satellite orbit control systems in the presence of actuator saturation, state constraints, and additive stochastic noises. Finally, a simulation example is presented to demonstrate the efficacy and superiority of the proposed orbit control method.

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A Novel Disturbance Observer for Multiagent Tracking Control with Matched and Unmatched Uncertainties

Cited by 2 publications

References 35 publications

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Relative Position Model Predictive Control of Double Cube Test-Masses Drag-Free Satellite with Extended Sliding Mode Observer

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