scholarly journals Experimental Simulation and Verification of Position Servo Control of Mechanical Rodless Cylinder

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Yeming ZHANG ◽  
Kaimin LI ◽  
Hongwei YUE ◽  
Shuangyang HE ◽  
Dongyuan LI ◽  
...  
Keyword(s):  
Position Control ◽  
Physical Structure ◽  
Pneumatic System ◽  
Experimental Simulation ◽  
Driving Voltage ◽  
Proportional Valve ◽  
Position Servo Control ◽  
Working Principle ◽  
The Mathematical Model ◽  
Valve Control

In order to improve the position control accuracy of rodless cylinder, the valve control cylinder system based on pneumatic proportional servo is studied deeply. According to the working principle of the mechanical rodless cylinder control system, under the condition of uniform speed, the driving voltage of the proportional valve is changed to measure multiple sets of friction force and corresponding velocity data. Analyzed the physical structure of each component in pneumatic system, established the mathematical model of pneumatic system, and introduced MATLAB system identification toolbox to identify the parameters of the transfer function. and the experiment verifies its correctness.

Study on High Frequency Hydraulic Exciter Based on Rotary Valve Control

2012 ◽  
Vol 490-495 ◽  
pp. 1441-1445 ◽  
Author(s):  
Jian Zhuo Zhang ◽  
Li Zhe Guan ◽  
Kang Kang Li
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Rotary Valve ◽  
Exciting Frequency ◽  
Working Principle ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Valve Control

A kind of hydraulic exciter based on rotary valve control was studied in this paper, the composition of the exciter and its working principle were introduced, and the mathematical model of the system was established. The characters of the system were simulated using MATLAB. From the results of the simulation, we get the relationship of the amplitude of Vibration oil cylinder between the system’s pressure and the exciting frequency. The results can provide theoretical bases to design the hydraulic exciter.

A Servo-Pneumatic Positioning System Driven by Fast Switching On/Off Valves

2011 ◽  
Author(s):  
Cristiano Cardoso Locateli ◽  
Victor Juliano De Negri ◽  
Edson Roberto De Pieri
Keyword(s):  
Pulse Width Modulation ◽  
Test Bench ◽  
Position Control ◽  
Flow Equation ◽  
Experimental Results ◽  
Pneumatic System ◽  
System Control ◽  
Fast Switching ◽  
The Mathematical Model ◽  
Position Control System

This paper discusses the theoretical and experimental results of a position control system using a pneumatic actuator driven by fast switching on/off valves. To begin with, there is a brief introduction about servo-pneumatic systems driven by fast switching valves. Subsequently, the mathematical model of the servo-pneumatic system is discussed involving directional fast switching on/off valves and the flow control valves, modeled according to the mass flow equation based on ISO 6358 and the actuator modeled by Newton’s second law and the continuity equation. The system control is performed through the pulse width modulation (PWM) technique used with a proportional-integrative-derivative (PID) controller. The system performance is analyzed in relation to its application for power control of wind turbines. The simulations of the servo-pneumatic system were carried out by Matlab/Simulink with the experimental results obtained through a test bench.

Research on Fuzzy Control of Hydro-Viscous Speed Control System

2014 ◽  
Vol 697 ◽  
pp. 214-221
Author(s):  
Li Gang Ma ◽  
Chang Le Xiang ◽  
Jian Wei Zhang ◽  
Xin Zhang
Keyword(s):  
Control System ◽  
Speed Control ◽  
Fuzzy Pid Control ◽  
Proportional Valve ◽  
Cooling Fan ◽  
Speed Control System ◽  
Working Principle ◽  
Clutch Control ◽  
System Controller ◽  
The Mathematical Model

The paper analyzes the working principle of hydro-viscous speed control system, establishes the mathematical model of electro-hydraulic proportional valve and the hydro-viscous clutch. In order to solve the problem of nonlinear and improve the real-time of the hydro-viscous clutch control system, the paper applies the method of fuzzy-PID control, realizes the design and simulation of the speed-system controller in the Simulink platform of MATLAB and performs an experiment by controlling the cooling fan of tracked vehicle.

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.

Simulation and Research of New MW Wind Turbine Yaw Hydraulic System Based on AMEsim

2014 ◽  
Vol 536-537 ◽  
pp. 1621-1624 ◽  
Author(s):  
Li Wen Yan ◽  
Cun Jin Ai ◽  
Hui Xie
Keyword(s):  
Wind Turbine ◽  
Hydraulic System ◽  
Kinetic Equations ◽  
Shaft Speed ◽  
Current Signal ◽  
Motor Shaft ◽  
Proportional Valve ◽  
Working Principle ◽  
Valve Control ◽  
Signal Action

This paper presents a new MW wind turbine yaw hydraulic system,and describes the working principle of the hydraulic system,derives kinetic equations of the electromagnetic proportional valve and the motor in the hydraulic circuit,uses AMEsim to establish a simulation model of the electromagnetic proportional valve control motor hydraulic system,sets parameters of main elements of the model,and simulates.given under the input current signal action,derives yaw motor shaft speed and time graphics,and analysis.

The Simulation Analysis of the High Speed Switch Valve Control the Cartridge Valve Based on AMEsim

2014 ◽  
Vol 971-973 ◽  
pp. 827-832
Author(s):  
Yan Jin Qin ◽  
Zhang Yong Wu ◽  
Zi Yong Mo ◽  
Xian Wang ◽  
Juan Wang
Keyword(s):  
Duty Cycle ◽  
High Frequency ◽  
High Speed ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Pulse Width Modulated ◽  
Working Principle ◽  
The Impact ◽  
The Mathematical Model ◽  
Valve Control

To establish the mathematical model of the system of high speed switch valve control the cartridge valve based on analyzing the working principle of the system,and then to analyze the impact of selecting different input signal of high speed solenoid valve and different duty cycle of PWM pulse width modulated signal through simulation software AMSEsim. The results obtained in the high-frequency performance is not very satisfactory, but in the low signal and moderate duty cycle, high-speed switch valve can be good linear control of the cartridge valve.

scholarly journals Research on a Piezoelectric Pump with Flexible Valves

2021 ◽  
Vol 11 (7) ◽  
pp. 2909
Author(s):  
Weiqing Huang ◽  
Liyi Lai ◽  
Zhenlin Chen ◽  
Xiaosheng Chen ◽  
Zhi Huang ◽  
...  
Keyword(s):  
Flow Rate ◽  
Fluid Transport ◽  
Smooth Transition ◽  
Driving Voltage ◽  
Piezoelectric Pump ◽  
Venous Valve ◽  
Output Pressure ◽  
Small Flow ◽  
Working Principle ◽  
Opening And Closing

Imitating the structure of the venous valve and its characteristics of passive opening and closing with changes in heart pressure, a piezoelectric pump with flexible valves (PPFV) was designed. Firstly, the structure and the working principle of the PPFV were introduced. Then, the flexible valve, the main functional component of the pump, was analyzed theoretically. Finally, an experimental prototype was manufactured and its performance was tested. The research proves that the PPFV can achieve a smooth transition between valved and valveless by only changing the driving signal of the piezoelectric (PZT) vibrator. The results demonstrate that when the driving voltage is 100 V and the frequency is 25 Hz, the experimental flow rate of the PPFV is about 119.61 mL/min, and the output pressure is about 6.16 kPa. This kind of pump can realize the reciprocal conversion of a large flow rate, high output pressure, and a small flow rate, low output pressure under the electronic control signal. Therefore, it can be utilized for fluid transport and pressure transmission at both the macro-level and the micro-level, which belongs to the macro–micro combined component.

scholarly journals Backstepping Sliding-Mode Control of Piezoelectric Single-Piston Pump-Controlled Actuator

Actuators ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 154
Author(s):  
Bin Wang ◽  
Pengda Ren ◽  
Xinhao Huang
Keyword(s):  
Sliding Mode Control ◽  
Position Control ◽  
Control Method ◽  
Sliding Mode ◽  
Piezoelectric Pump ◽  
Mode Control ◽  
Control Precision ◽  
Backstepping Sliding Mode Control ◽  
Actuator System ◽  
The Mathematical Model

A piston piezoelectric (PZT) pump has many advantages for the use of light actuators. How to deal with the contradiction between the intermittent oil supplying and position control precision is essential when designing the controller. In order to accurately control the output of the actuator, a backstepping sliding-mode control method based on the Lyapunov function is introduced, and the controller is designed on the basis of establishing the mathematical model of the system. The simulation results show that, compared with fuzzy PID and ordinary sliding-mode control, backstepping sliding-mode control has a stronger anti-jamming ability and tracking performance, and improves the control accuracy and stability of the piezoelectric pump-controlled actuator system.

scholarly journals Proposal of a Decoupled Structure of Fuzzy-PID Controllers Applied to the Position Control in a Planar CDPR

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 745
Author(s):  
Marco Carpio ◽  
Roque Saltaren ◽  
Julio Viola ◽  
Cristian Calderon ◽  
Juan Guerra
Keyword(s):  
Position Control ◽  
Control Structure ◽  
Parallel Robot ◽  
Pid Controllers ◽  
Fuzzy Pid ◽  
End Effector ◽  
Robot Systems ◽  
Decoupled Control ◽  
The Mathematical Model ◽  
Decoupled Structure

The design of robot systems controlled by cables can be relatively difficult when it is approached from the mathematical model of the mechanism, considering that its approach involves non-linearities associated with different components, such as cables and pulleys. In this work, a simple and practical decoupled control structure proposal that requires practically no mathematical analysis was developed for the position control of a planar cable-driven parallel robot (CDPR). This structure was implemented using non-linear fuzzy PID and classic PID controllers, allowing performance comparisons to be established. For the development of this research, first the structure of the control system was proposed, based on an analysis of the cables involved in the movement of the end-effector (EE) of the robot when they act independently for each axis. Then a tuning of rules was carried out for fuzzy PID controllers, and Ziegler–Nichols tuning was applied to classic PID controllers. Finally, simulations were performed in MATLAB with the Simulink and Simscape tools. The results obtained allowed us to observe the effectiveness of the proposed structure, with noticeably better performance obtained from the fuzzy PID controllers.

Position control of an electro-pneumatic system based on PWM technique and FLC

2014 ◽  
Vol 53 (2) ◽  
pp. 647-657 ◽  
Author(s):  
Behrouz Najjari ◽  
S. Masoud Barakati ◽  
Ali Mohammadi ◽  
Muhammad J. Futohi ◽  
Muhammad Bostanian
Keyword(s):  
Position Control ◽  
Pneumatic System
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