scholarly journals Pneumatic Rotary Actuator Position Servo System Based on ADE-PD Control

2018 ◽  
Vol 8 (3) ◽  
pp. 406 ◽  
Author(s):  
◽  
◽  
◽  
Keyword(s):  
Servo System ◽  
Pd Control ◽  
Rotary Actuator ◽  
Position Servo

scholarly journals Evolutionary Algorithm-Based Friction Feedforward Compensation for a Pneumatic Rotary Actuator Servo System

2018 ◽  
Vol 8 (9) ◽  
pp. 1623 ◽  
Author(s):  
Ke Li ◽  
Yeming Zhang ◽  
Shaoliang Wei ◽  
Hongwei Yue
Keyword(s):  
Differential Evolution ◽  
Evolutionary Algorithm ◽  
Differential Evolution Algorithm ◽  
Servo System ◽  
Control Architecture ◽  
Tracking Accuracy ◽  
Pd Control ◽  
Compensation Control ◽  
Position Accuracy ◽  
Rotary Actuator

The friction interference in the pneumatic rotary actuator is the primary factor affecting the position accuracy of a pneumatic rotary actuator servo system. The paper proposes an evolutionary algorithm-based friction-forward compensation control architecture for improving position accuracy. Firstly, the basic equations of the valve-controlled actuator are derived and linearized in the middle position, and the transfer function of the system is further obtained. Then, the evolutionary algorithm-based friction feedforward compensation control architecture is structured, including that the evolutionary algorithm is used to optimize the controller coefficients and identify the friction parameters. Finally, the contrast experiments of four control strategies (the traditional PD control, the PD control with friction feedforward compensation without evolutionary algorithm tuning, the PD control with friction feedforward compensation based on the differential evolution algorithm, and the PD control with friction feedforward compensation based on the genetic algorithm) are carried out on the experimental platform. The experimental results reveal that the evolutionary algorithm-based friction feedforward compensation greatly improves the position tracking accuracy and positioning accuracy, and that the differential evolution-based case achieves better accuracy. Also, the system with the friction feedforward compensation still maintains high accuracy and strong stability in the case of load.

scholarly journals Nonlinear Model Establishment and Experimental Verification of a Pneumatic Rotary Actuator Position Servo System

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1096 ◽  
Author(s):  
Yeming Zhang ◽  
Ke Li ◽  
Geng Wang ◽  
Jingcheng Liu ◽  
Maolin Cai
Keyword(s):  
Heat Transfer ◽  
Linear Model ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Experimental Verification ◽  
Servo System ◽  
Rotary Actuator ◽  
Non Linear ◽  
Position Servo

In order to accurately reflect the characteristics and motion states of a pneumatic rotary actuator position servo system, an accurate non-linear model of the valve-controlled actuator system is proposed, and its parameter identification and experimental verification are carried out. Firstly, in the modeling of this system, the mass flow rate of the gas flowing through each port of the proportional directional control valve is derived by taking into account the clearance between the valve spool and the sleeve, the heat transfer formula is used to the derivation of the energy equation, and the Stribeck model is applied to the friction model of the pneumatic rotary actuator. Then, the flow coefficient, the heat transfer coefficient and the friction parameters are identified by the model and pneumatic test circuits. After the verification experiment of the mass flow rate equations, the charging and discharging experiment reveals that the model can clearly show the effect of clearances on gas pressure changes and describe the effect of heat transfer on gas temperature changes. Finally, the results of model verification indicate that the simulation curves of rotation angle and two-chamber pressures are consistent with their experimental values, and the non-linear model shows high accuracy.

Study of Hydraulic Servo System Based on Fuzzy Sliding Mode Algorithm

2013 ◽  
Vol 753-755 ◽  
pp. 2674-2678
Author(s):  
Kun Yang ◽  
Cai Jun Liu ◽  
Shu Min Liu
Keyword(s):  
Control Algorithm ◽  
Sliding Mode ◽  
Servo System ◽  
Time Varying ◽  
External Interference ◽  
System A ◽  
Hydraulic Servo ◽  
Fuzzy Sliding Mode ◽  
Hydraulic Servo System ◽  
Position Servo

Based on the situation that the hydraulic position servo system is easily influenced by the external interference and the parameters of which are different with time-varying, the fuzzy control can soften the buffeting and the sliding algorithm has no the same problems as the hydraulic position servo system, a brandly-new fuzzy sliding control algorithm is designed. In the simulation process, within the parameters of simulated time-varying and outside strong interference, the results show that the hydraulic servo system based on fuzzy sliding mode control algorithm has a greater resistance to internal and external interference and time-varying parameters.

scholarly journals BP-PID Control for Electro-hydraulic Proportional Position Servo System

2013 ◽  
Vol 9 (3) ◽  
pp. 40 ◽  
Author(s):  
Zheng Jianming ◽  
Xiao Min ◽  
Yang Mingshun ◽  
Li Yan ◽  
Kong Lingfei
Keyword(s):  
Pid Control ◽  
Servo System ◽  
Position Servo

A PMSM position servo system based on finite-time control

2008 ◽  
Author(s):  
Liu Huixian ◽  
Ding Shihong ◽  
Li Shihua ◽  
Chen Xisong
Keyword(s):  
Finite Time ◽  
Servo System ◽  
Time Control ◽  
Position Servo
Sign in / Sign up

Export Citation Format

Share Document