Zhang Xin
Shenzhen Power Supply Co., Ltd.

Published : 5 Documents
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Parameter Optimization of PID Controller Based on PSO for Multi-leaf Collimator Xin, Zhang
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 11, No 10: October 2013
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/telkomnika.v11i10.2759

Abstract

According to the control requirements of the leaves’ position precision in the multi-leaf collimator, the structure and working principle of the multi-leaf collimator in the conformal radiation therapy apparatus are described. The motor that drives the leaf of the MLC is taken as the control object. The module of the motor has been established. Then the PSO algorithm is used for the parameter optimization of PID controller that outputs the given expectation to the motor, in order to ensure the position accuracy of the MLC leaves. The experimental results indicate that this algorithm can meet the needs of the control precision of the leaves’ position of the multi-leaf collimator, and each control index is obviously superior to the traditional method for PID control.
Design of Self Balancing Anti Disturbance System for Multi Rotor UAV Xin, Zhang; Xun, Li; Huikun, Pei; Ronghui, Huang
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 2A: 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (498.735 KB) | DOI: 10.12928/telkomnika.v14i2A.4324

Abstract

Active anti disturbance controller is applied to UAV flight control system. First, tracking differentiator is used for arranging transient process to achieve the purpose of quickly and accurately tracking the given signal. Then the uncertain disturbance of the system is estimated in a real-time way by expanding state observer and control input is introduced in the form of feedback quantity to play the real-time role in compensating system disturbance, so as to realize attitude stabilization control. Asymptotic stability of control system is proved on the basis of the stability theory of Lyapunov and the design of robust controller is completed by combining with linear matrix inequality. Through simulated test, compare state response curve under different time delay conditions and the result proves that the designed robust controller can resolve the problems such as uncertain modeling error, disturbance and time delay existing in the system, with certain robustness. Result of numerical simulation shows that this method is characterized by strong anti-disturbance capacity, good control quality, high accuracy and simple algorithm.
Flight Reliability of Multi Rotor UAV Based on Genetic Algorithm Ronghui, Huang; Xun, Li; Xin, Zhang; Huikun, Pei
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 2A: 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (591.17 KB) | DOI: 10.12928/telkomnika.v14i2A.4354

Abstract

The UAV system has been widely applied in various military and civil fields. This technology mainly is applied to radar positioning, wild fire management, agricultural monitoring, environmental monitoring, aerial photography and search and rescue mission. It conducts real-time monitoring and control on the inclination angle, inclination angle speed and accelerated speed of inclination angle based on the flight attitude control of the multi rotor UVA. Secondly, it controls the swing deflection of rotor, motor speed, inclination angle control and speed based on the optimal solution ability to overall search of the genetic algorithm to achieve the real time optimization of parameters. Then, it establishes the servo unit with direct torque current which will be combined with the sliding mode controller to reconfigure the sliding mode variable structure controller with direct torque to carry out control on the motor balance in advance. The experiment results show that the servo unit with direct torque current together with genetic algorithm realizes the error correction of the hovering rotor of UVA; during the dynamic control of the UAV fight, the gyroscope is sensitive to the change of the aerial carrier attitude and then the correction to the drift of gyroscope can be realized to provide stable reliability control for the whole UAV flight.
Flight Reliability of Multi Rotor UAV Based on Genetic Algorithm Ronghui, Huang; Xun, Li; Xin, Zhang; Huikun, Pei
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 2A: 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (591.17 KB) | DOI: 10.12928/telkomnika.v14i2A.4354

Abstract

The UAV system has been widely applied in various military and civil fields. This technology mainly is applied to radar positioning, wild fire management, agricultural monitoring, environmental monitoring, aerial photography and search and rescue mission. It conducts real-time monitoring and control on the inclination angle, inclination angle speed and accelerated speed of inclination angle based on the flight attitude control of the multi rotor UVA. Secondly, it controls the swing deflection of rotor, motor speed, inclination angle control and speed based on the optimal solution ability to overall search of the genetic algorithm to achieve the real time optimization of parameters. Then, it establishes the servo unit with direct torque current which will be combined with the sliding mode controller to reconfigure the sliding mode variable structure controller with direct torque to carry out control on the motor balance in advance. The experiment results show that the servo unit with direct torque current together with genetic algorithm realizes the error correction of the hovering rotor of UVA; during the dynamic control of the UAV fight, the gyroscope is sensitive to the change of the aerial carrier attitude and then the correction to the drift of gyroscope can be realized to provide stable reliability control for the whole UAV flight.
Design of Self Balancing Anti Disturbance System for Multi Rotor UAV Xin, Zhang; Xun, Li; Huikun, Pei; Ronghui, Huang
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 2A: 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (498.735 KB) | DOI: 10.12928/telkomnika.v14i2A.4324

Abstract

Active anti disturbance controller is applied to UAV flight control system. First, tracking differentiator is used for arranging transient process to achieve the purpose of quickly and accurately tracking the given signal. Then the uncertain disturbance of the system is estimated in a real-time way by expanding state observer and control input is introduced in the form of feedback quantity to play the real-time role in compensating system disturbance, so as to realize attitude stabilization control. Asymptotic stability of control system is proved on the basis of the stability theory of Lyapunov and the design of robust controller is completed by combining with linear matrix inequality. Through simulated test, compare state response curve under different time delay conditions and the result proves that the designed robust controller can resolve the problems such as uncertain modeling error, disturbance and time delay existing in the system, with certain robustness. Result of numerical simulation shows that this method is characterized by strong anti-disturbance capacity, good control quality, high accuracy and simple algorithm.