Research on the Positioning Servo Control Strategy for CNC System

2013 ◽  
Vol 694-697 ◽  
pp. 1851-1854
Author(s):  
Li Bing Zhang ◽  
Ting Wu
Keyword(s):  
Control Method ◽  
Dynamic Performance ◽  
Servo Control ◽  
Numerical Control ◽  
Cnc System ◽  
Control Approach ◽  
System A ◽  
Position Servo Control ◽  
Position Servo ◽  
Rolling Optimization

In order to overcome thelimitation of the position servo control method of computerized numerical control(CNC) system, a control approach of generalized predictive control (GPC) ispresented in this paper. In the method, the GPC model calculates the optimalcontrol rate through the predictive model and rolling optimization as thecontroller of the position servo system. Compared with GPC and proportional-integral-derivative(PID) control, the simulative and experimental results show that the proposedcontrol approach has better the dynamic performance, steady-state performance,and robustness.

Design and Realization on the Optimal Quadratic Controller for the Positional Servo System of Numerical Control System

2011 ◽  
Vol 317-319 ◽  
pp. 1960-1963
Author(s):  
Li Bing Zhang ◽  
Ting Wu
Keyword(s):  
Control System ◽  
Control Method ◽  
Servo System ◽  
Least Square Method ◽  
Least Square ◽  
Servo Control ◽  
Numerical Control ◽  
Recursive Least Square ◽  
Servo Control System ◽  
Position Servo

This paper presents a technique for the position servo system of numerical control (NC) machine tool by utilizing the optimal quadratic controller. The mathematical model of the position servo control system is structured, which of the plant model is identified by making use of recursive least square method. The fundamental method of designing the optimal quadratic controller is proposed. Simulation of the optimal quadratic controller and PID controller are implemented by using MATLAB. The results of simulation show that the proposed control method of positional servo control system has better dynamic characteristics and better steady performance.

scholarly journals Cylinder Position Servo Control Based on Fuzzy PID

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Shibo Cai ◽  
Shunlei Wu ◽  
Guanjun Bao
Keyword(s):  
Position Control ◽  
Control Method ◽  
Absolute Error ◽  
Servo Control ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Proportional Valve ◽  
Fuzzy Variables ◽  
Position Servo Control ◽  
Position Servo

The arbitrary position control of cylinder has always been the hard challenge in pneumatic system. We try to develop a cylinder position servo control method by combining fuzzy PID with the theoretical model of the proportional valve-controlled cylinder system. The pressure differential equation of cylinder, pressure-flow equation of proportional valve, and moment equilibrium equation of cylinder are established. And the mathematical models of the cylinder driving system are linearized. Then fuzzy PID control algorithm is designed for the cylinder position control, including the detail analysis of fuzzy variables and domain, fuzzy logic rules, and defuzzification. The stability of the proposed fuzzy PID controller is theoretically proved according to the small gain theorem. Experiments for targets position of 250 mm, 300 mm, and 350 mm were done and the results showed that the absolute error of the position control is less than 0.25 mm. And comparative experiment between fuzzy PID and classical PID verified the advantage of the proposed algorithm.

Position Servo Control of the Transverse Flux Machine Based on an Armature Current RMS and Initial Phase Control Method

2013 ◽  
Vol 756-759 ◽  
pp. 284-287
Author(s):  
Jia Xie ◽  
Shi Ming Wang ◽  
Yan Xiang Wu ◽  
Zheng Hui Sha
Keyword(s):  
Control System ◽  
Initial Phase ◽  
Control Method ◽  
Servo Control ◽  
Servo Control System ◽  
Electromagnetic Power ◽  
Voltage Balance ◽  
Position Servo Control ◽  
Transverse Flux ◽  
Position Servo

A control method for position servo control of Transverse flux machine (TFM) by controlling armature current Root-Mean-Square (RMS) and initial phase is proposed in this paper. Specifically, the voltage balance equation of TFM is provided, and the phasor diagrams are analyzed to achieve the expression of electromagnetic power of TFM. The expression indicates that the electromagnetic torque is determined by armature current RMS and the initial phase. A position servo control system of TFM is established based on the expression. The results of the position servo control curves show that the position servo control system of TFM is effective.

Design and Position Servo Control of an Active Body-Weight Support Training System

2021 ◽  
Author(s):  
Chao Wei ◽  
Tao Qin ◽  
Xin Meng ◽  
Jinxing Qiu ◽  
Qilong Meng ◽  
...  
Keyword(s):  
Body Weight ◽  
Training System ◽  
Servo Control ◽  
Body Weight Support ◽  
Weight Support ◽  
Position Servo Control ◽  
Position Servo

scholarly journals Optimized PID Controller Based on Beetle Antennae Search Algorithm for Electro-Hydraulic Position Servo Control System

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2727 ◽  
Author(s):  
Yuqi Fan ◽  
Junpeng Shao ◽  
Guitao Sun
Keyword(s):  
Control System ◽  
Pid Controller ◽  
Search Algorithm ◽  
Three Dimensional ◽  
Parameter Tuning ◽  
Servo Control ◽  
Dimensional Parameter ◽  
Servo Control System ◽  
Position Servo Control ◽  
Position Servo

To improve the controllability of an electro-hydraulic position servo control system while simultaneously enhancing the anti-jamming ability of a PID controller, a compound PID controller that combines the beetle antennae search algorithm with PID strategy was proposed, and used to drive the position servo control system of the electro-hydraulic servo system. A BAS-PID controller was designed, and the beetle antennae search algorithm was used to tune PID parameters so that the disturbance signal of the system was effectively restrained. Initially, the basic mathematical model of the electro-hydraulic position servo control system was established through theoretical analysis. The transfer function model was obtained by identifying system parameters. Then, the PID parameter-tuning problem was converted into a class of three-dimensional parameter optimization problem, and gains of PID controllers were adjusted using the beetle antennae search algorithm. Finally, by comparing the effectiveness of different algorithms, simulation and experimental results revealed that the BAS-PID controller can greatly enhance the performance of the electro-hydraulic position servo control system and inhibit external disturbances when different interference signals are used to test the system’s robustness.

A Novel Acceleration/Deceleration Control Algorithm for High Precision Feed Motion System

2012 ◽  
Author(s):  
Kun Cao ◽  
Wanhua Zhao ◽  
Hui Liu ◽  
Xiaojun Yang ◽  
Jun Zhang
Keyword(s):  
Dynamic Performance ◽  
Tracking Error ◽  
Transient State ◽  
Servo Control ◽  
Cnc System ◽  
Motion System ◽  
Servo Control System ◽  
Dynamic Precision ◽  
Transient Error ◽  
The Time Domain

The feed motion dynamic precision is determined by the properties of the CNC system, the servo control system and the mechanical structure. The Acceleration/Deceleration Control (ADC) in CNC system is widely used to smooth the motion trajectory, so as to reduce transient error caused by vibration. The performance of various ADC algorithms differ significantly, which indicates the importance of developing more effective ADC algorithm. In this paper a novel ADC algorithm called “Asymmetric Double S-shape type Algorithm” is introduced and validated by detailed mathematic deduction, and then its dynamic performance is compared with that of traditional ADC algorithms in both the time domain and frequency domain. The analytical and simulation results demonstrated that, the proposed novel ADC algorithm has notably advantage over the traditional ones in reducing the tracking error in both transient state and steady state, hence is capable of fundamentally improving the feed motion dynamic precision.

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