Model predictive controller based on Laguerre functions for large radio telescope servo control system

Phuong, Tran Huu; Belov, Mikhail P.; Khoa, Tran Dang

doi:10.1109/eiconrus.2018.8317258

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…In order to prevent inaccurate positioning caused by out-of-step and overshoot, the closed-loop position control based on the resolver angle is designed [16,17]. During the movement, the position controlling module receives the step signal and updates the internal position register.…”

Section: Position Controlmentioning

confidence: 99%

Design of Motion Controller for Satellite-Borne Data Transmission Antenna

Shi

Zhang

et al. 2019

International Journal of Aerospace Engineering

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In order to realize stable, reliable, and high-precision motion control of the satellite-borne data transmission antenna, a FPGAbased motion controller is designed and achieved. The controller receives commands through the RS-422 asynchronous transmission serial port and performs speed planning autonomously. The controller also performs closed-loop position control with the collected resolver angle and controls two antennas synchronously or independently in a subdivision driving method. The controller is firstly designed using the hardware description language VHDL, simulated in ModelSim software. Then, it is connected to the stepping motors through the LMD18200H bridge chip by using aerospace-grade FPGA, controlling the data transmission antennas to regulate the angle, go to zero-position, or stop rotation. The simulation and experiment results show that the design can control the antennas accurately and stably. The accuracy of angle regulation reaches 0.0085°under the condition of 64 subdivisions and 100 : 1 reduction ratio.

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Section: Position Controlmentioning

confidence: 99%

Design of Motion Controller for Satellite-Borne Data Transmission Antenna

Shi

Zhang

et al. 2019

International Journal of Aerospace Engineering

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“…On the other hand, there were a lot of researches on control system modeling and analysis of telescopes. Phuong et al (2018) modeled the electromechanical system of the RT-70 telescope and proposed a servo drive system with discrete-time model predictive controller based on Laguerre functions. A linear optimal controller was also designed for rotating speed control in azimuth (Belov & Phuong 2017).…”

Section: Introductionmentioning

confidence: 99%

Collaborative Simulation of Mechanical Structure and Control Systems of Leighton Chajnantor Telescope

Yao

Chen²,

Wang³

2023

Res. Astron. Astrophys.

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Leighton Chajnantor Telescope (LCT) will be moved from the summit of Mauna Kea, Hawaii to Chajnantor Plateau, Chile and be refurbished there. Strong wind disturbance at the new site will bring great challenges to the servo control of LCT. It is necessary and important to develop a simulation platform that behaves as close as possible to the real telescope for testing the performance of the designed servo controller. In this paper, a collaborative simulation platform of LCT based on Adams and Matlab/Simulink is constructed. On this platform, the mechanical structure model of LCT can be integrated with its control system model such that a collaborative simulation of the mechanical structure and the control system of LCT can be conducted. The mechanical structure model of LCT, which contains both rigid body models (i.e., the mount) and flexible body models (i.e., the primary reflector), is developed by using Adams. The servo system model and the wind disturbance model are constructed by using Matlab/Simulink. By conducting collaborative simulation, the performances of the servo controller based on the rigid body model and the rigid-flexible coupling model of LCT are compared. The comparison shows that the controller designed based on the rigid body model does not perform well when it is employed to control the rigid-flexible coupling model of LCT. However, by readjusting parameters of the servo controller, its performance can be further improved when applied to the rigid-flexible coupling model. Therefore, an integrated mechanical structure and control systems model of LCT is very helpful for analyzing its performance more accurately and designing a better servo controller.

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Adaptive Dynamic Surface Control for Servo System Driven by Twin Motors With Unknown Actuator Failures

Wang

Cai

et al. 2019

IEEE Access

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Adaptive backstepping control is an effective method for servo system driven by twin motors with unknown actuator failures, however, problems such as explosion of complexity make it can not be used in the actual control systems. In this paper, an algorithm of adaptive dynamic surface control is proposed for servo system driven by twin motors with unknown actuator failures, which can eliminate the expansion of the differential term and simplify calculations in the controller design. In addition, all parameters and disturbances in the system model are unknown, which require to be identified online. The simulation results also provided in order to show the effectiveness of the algorithm.

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Model predictive controller based on Laguerre functions for large radio telescope servo control system

Cited by 7 publications

References 3 publications

Design of Motion Controller for Satellite-Borne Data Transmission Antenna

Design of Motion Controller for Satellite-Borne Data Transmission Antenna

Collaborative Simulation of Mechanical Structure and Control Systems of Leighton Chajnantor Telescope

Adaptive Dynamic Surface Control for Servo System Driven by Twin Motors With Unknown Actuator Failures

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