scholarly journals Simulation of the Apply Integral Control and Bias Estimator on Proximate Time Optimal Servo System

2016 ◽  
Keyword(s):  
Servo System ◽  
Integral Control ◽  
Time Optimal

Efficient time-optimal feedrate planning under dynamic constraints for a high-order CNC servo system

2013 ◽  
Vol 45 (12) ◽  
pp. 1538-1546 ◽  
Author(s):  
Jian-Xin Guo ◽  
Ke Zhang ◽  
Qiang Zhang ◽  
Xiao-Shan Gao
Keyword(s):  
Servo System ◽  
High Order ◽  
Dynamic Constraints ◽  
Feedrate Planning ◽  
Time Optimal

System identification and robust position control for electro-hydraulic servo system using hybrid model predictive control

2017 ◽  
Vol 24 (18) ◽  
pp. 4145-4159 ◽  
Author(s):  
Hai-Bo Yuan ◽  
Hong-Cheol Na ◽  
Young-Bae Kim
Keyword(s):  
System Identification ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Position Control ◽  
Servo System ◽  
Model Parameters ◽  
Integral Control ◽  
Hybrid Controller ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

This paper examined system identification using grey-box model estimation and position-tracking control for an electro-hydraulic servo system (EHSS) using hybrid controller composed of proportional-integral control (PIC) and model predictive control (MPC). The nonlinear EHSS model is represented by differential equations. We identify model parameters and verify their accuracy against experimental data in MATLAB to evaluate the validity of this mathematical model. To guarantee improved performance of EHSS and precision of cylinder position, we propose a hybrid controller composed of PIC and MPC. The controller is designed using the Control Design and Simulation module in the Laboratory Virtual Instrumentation Engineering Workbench (LabVIEW). A LabVIEW-based experimental rig is developed to apply the proposed controller in real time. Then, the validity and performance superiority of the hybrid controller were confirmed by comparing them with the MPC and PIC results. Results of real-life experiments show improved robustness and dynamic and static properties of EHSS.

scholarly journals Proximate Time-Optimal Servomechanism Based on Transition Process for Electro-Optical Set-Point Tracking Servo System

2019 ◽  
Vol 9 (23) ◽  
pp. 5201
Author(s):  
Qianwen Duan ◽  
Qiunong He ◽  
Yao Mao ◽  
Xi Zhou ◽  
Qintao Hu
Keyword(s):  
Servo System ◽  
Target Position ◽  
Signal Amplitude ◽  
Transition Process ◽  
Servo Systems ◽  
Set Point ◽  
Point Tracking ◽  
Position Signal ◽  
Time Optimal ◽  
The Stability

Set-point tracking servo systems encounter the problem of the trade-off between the swiftness and smoothness in tracking task. To deal with this problem, the proximate time-optimal servomechanism based on transition process (PTSTP) is proposed in this paper. The PTSTP control scheme incorporates a transition process (TP) into the framework of proximate time-optimal servomechanism (PTOS) to eliminate the conservatism of the original PTOS without the controller changing. The target position signal amplitude and the ultimate ability of actuator are utilized to design the time-optimal TP to make the jumping target position signal turns to a smooth signal, which can significantly reduce system overshoot. Therefore, the system swiftness and smoothness performance are guaranteed by PTSTP. Then, the stability of the proposed method is analyzed theoretically. Finally, the experimental results show that the controlled system is able to track the target position signal with different amplitude fast and smoothly in an electro-optical set-point tracking servo system.

Time optimal control for induction motor servo system

2003 ◽  
Author(s):  
G.-T. Kim ◽  
K.-S. Kim ◽  
M.-H. Park ◽  
C.-Y. Won ◽  
D.-S. Ahn
Keyword(s):  
Optimal Control ◽  
Induction Motor ◽  
Servo System ◽  
Time Optimal Control ◽  
Time Optimal

scholarly journals Linear active disturbance rejection control for the electro-hydraulic position servo system

2021 ◽  
Vol 104 (1) ◽  
pp. 003685042110009
Author(s):  
Kunshan Jin ◽  
Jianli Song ◽  
Yongtang Li ◽  
Zhiqiang Zhang ◽  
Haibo Zhou ◽  
...  
Keyword(s):  
Disturbance Rejection ◽  
High Performance ◽  
Servo System ◽  
Active Disturbance Rejection Control ◽  
Integral Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Loading System ◽  
Proportional Integral Control ◽  
The Stability

Valve-controlled asymmetric cylinder is widely used in servo loading system. As a kind of typical electro-hydraulic servo system (EHSS), it inherently has the characteristics such as high order nonlinear, strong coupling, and uncertain, therefore, conventional control strategy is difficult to satisfy the requirements of high-performance control. In this paper, a novel linear active disturbance rejection control (LADRC) method was proposed, in which the internal and external disturbances were actively estimated by the third-order linear extended state observer (LESO) in real-time, and rejected by the control law of proportional integral control (PID) with acceleration feed-forward. The stability of the proposed method was proved, and the influence rules of the LADRC parameters on the control performance were revealed by simulation. Finally, comparative experiments between LADRC and PID control were carried out, results showed that the disturbances can be effectively compensated and the control goals can be successfully achieved with the proposed method.

Time optimal step servo system

1971 ◽  
Vol 9 (6) ◽  
pp. 227
Author(s):  
V.V. Athani ◽  
J.H. Mansurt
Keyword(s):  
Servo System ◽  
Time Optimal
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