scholarly journals FEATURES OF CONTROLLING ELECTROPNEUMATIC VALVES OF ACTUATOR TO CONTROL ITS CLUTCH WITH ACCELERATION VALVE

2018 ◽  
Vol 17 (1) ◽  
pp. 64-71 ◽  
Author(s):  
O. A. Yaryta ◽  
M. G. Mychalevych ◽  
D. N. Leontiev ◽  
V. I. Klymenko ◽  
V. A. Bogomolov ◽  
...  
Keyword(s):  
Control System ◽  
Power Supply ◽  
Control Algorithm ◽  
Pulse Width Modulation ◽  
Solenoid Valve ◽  
Excess Pressure ◽  
Pneumatic Cylinder ◽  
Quantitative Characteristics ◽  
Clutch Control ◽  
Single Power

The article deals with one of the ways to control an actuator of the automated clutch control system. The aim is to design control of the electropneumatic actuator, to control its coupling with the acceleration valve on the basis of experimental research as well as to provide rational parameters of the automated clutch control system for the robotic transmission. The feature of the system is an acceleration valve in the design of the electropneumatic actuator to control the clutch. New links demand to adjust the way to control the actuator. The connection of Pulse-Width Modulation (PWM) with single power supply pulses to control electropneumatic valves is substantiated. The quantitative characteristics of single control pulses and PWM ones are determined. The error of operation accuracy for various ways of the control of the electropneumatic actuator to control the clutch of the robotic transmission is determined. Obtained separate PWM area is designed to suppress the initial hysteresis when the rod of the clutch actuator is moved. An algorithm for the operation of a clutch control system is proposed, taking into account the use of two modes of operation of solenoid valves. A graphical interpretation of the clutch control algorithm is presented, which gives an idea of the location of the constant signal feeding zones to the solenoid valve, as well as the operation areas of the solenoid valve in PWM mode. The control algorithm of the clutch booster provides a mode of guaranteed absence of excess pressure in the pneumatic cylinder after releasing the clutch pedal, provided that two normally closed solenoid valves are used. This configuration of the electro-pneumatic clutch control system allows the use of an emergency clutch release system in case of voltage absence. The reference algorithm for filtering the array of data coming from the feedback sensor, as well as the numerical values of the delay caused by the presence of a filter, are given.

scholarly journals CONTROL SYSTEM OF STEEL BATTERY CHARGER

2018 ◽  
Vol 16 (3) ◽  
pp. 241
Author(s):  
Nikola Danković ◽  
Dragan Antić ◽  
Zoran Icić ◽  
Stanko Stankov ◽  
Dejan Mitić ◽  
...  
Keyword(s):  
Control System ◽  
Power Supply ◽  
Control Algorithm ◽  
Practical Realization ◽  
Battery Charger ◽  
Control Logic ◽  
Electrical Devices ◽  
Hardware Configuration ◽  
Regular Mode

A practical realization of control of a diode–thyristor bridge is provided in this paper. The proposed control logic is applied to an NiCd accumulator charger. These accumulators are used for power supply of electrical devices and equipment in CFR locomotives. The control system provides a regular mode of NiCd accumulators charging and discharging, and, in this way, their long lifespan. A hardware configuration and a control algorithm for efficient NiCd accumulator charging and preventing overcharging and overheating are provided.

scholarly journals Analysis and Synthesis of Control Systems for Spacecraft Solar Arrays

Machines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 64
Author(s):  
Anatoly K. Tishchenko ◽  
Eugeny M. Vasiljev ◽  
Artyom O. Tishchenko
Keyword(s):  
Control System ◽  
Power Supply ◽  
Pulse Width Modulation ◽  
Simulation Models ◽  
Operating Conditions ◽  
Solar Panel ◽  
Hierarchical Organization ◽  
Solar Panels ◽  
Solar Arrays ◽  
Reliable Power Supply

The paper is devoted to the problem of creating highly reliable power supply systems for spacecrafts intended for long-term autonomous flights. Within its framework, the problem of synthesizing a control system for solar arrays is being solved. To solve this problem, a mathematical model of a solar panel was compiled, and a study of its static and dynamic characteristics was carried out. It was found that when the solar panel is controlled using a shunt switch with pulse-width modulation, resonance phenomena appear in the system, leading to an unacceptable change in the polarity of voltages on the photocells. The operating conditions of the solar panels, which exclude the occurrence of the indicated alternating voltages, are found, and appropriate recommendations are given for the choice of the quantization frequency in the system. On the basis of the recommendations received, the transition to a quasi-continuous representation of the control system was carried out, and a graphic-analytical synthesis of the controller providing the required quality indicators of the system was carried out. To ensure the survivability of the power supply system, a method is proposed for the hierarchical organization of the interaction of solar panels, which reproduces the homeostatic properties of biological structures in the system. This property is provided by automatic transfer of control to subsequent levels of the hierarchy as the energy resources of the previous levels are exhausted. In addition, selective control is applied only to that part of the total generated power, which is sufficient to counter the current disturbing influences on the system. This approach to control prevents cascading failures in the system. The paper presents simulation models on which all theoretical positions and methods proposed in the work are tested.

Research of High Performance Closed Loop Control System for Stepper Motor

2013 ◽  
Vol 289 ◽  
pp. 87-92 ◽  
Author(s):  
Zhao Hua Xu ◽  
Xiao Hui Xie ◽  
Cui Ma ◽  
Qiang Sun ◽  
Ru Xu Du
Keyword(s):  
Control System ◽  
Control Algorithm ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Stepper Motor ◽  
Fuzzy Pid Control ◽  
Space Vector ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System

A control system of double closed-loop for two-phase hybrid stepper motor which includes speed closed-loop and current closed-loop is established on the basis of fuzzy-PID control algorithm, space vector pulse width modulation (SVPWM) method, space vector conversion and mathematical modeling of stepper motor. In the control system, the stepper motor model is established according to the mathematic model; the current and speed of stepper motor are controlled in feedback by the adopting fuzzy-PID control algorithm; the space vector conversion is carried out in the current/voltage conversion section, and the space vector pulse width modulation method is used to produce pwm wave. The performance of the doubled closed-loop control system for stepper motor is analyzed by the powerful modeling and simulation function of MATLAB/Simulink. The simulation results show that the control system has favorable control performance and dynamics characteristics.

Study on Direct Suspension Force Control of Bearingless Permanent Magnetic Slice Motor

2014 ◽  
Vol 529 ◽  
pp. 529-533
Author(s):  
Ying Yue Gu ◽  
Huang Qiu Zhu ◽  
Run Zhang Zeng
Keyword(s):  
Control System ◽  
Force Control ◽  
Control Algorithm ◽  
Pulse Width Modulation ◽  
Dynamic Performance ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Force Control System ◽  
Torque Ripples

The theory of direct torque control of traditional permanent magnet synchronous motor is applied to the radial suspension force control of a BPMSM in this paper.With the integration of the space vector pulse width modulation, a novelty SVPWM direct suspension force control system for the BPMSM is constructed.On the basis of mathematical modeling,the detail control algorithm is deduced.Then the control system is simulated with Matalab/Simulink,and the results show that the control algorithm is simplified and the torque ripples are restrained，fine static and dynamic performance is brought to the motor.

scholarly journals Optimization control actions on electropneumatic valve of actuator of clutch control

2021 ◽  
pp. 128-135
Author(s):  
Mykola Mykhalevych
Keyword(s):  
Control System ◽  
Pressure Drop ◽  
Ambient Temperature ◽  
Supply Voltage ◽  
Optimization Method ◽  
Response Surfaces ◽  
Solenoid Valve ◽  
Control Pulse ◽  
Clutch Control ◽  
Electropneumatic Valve

Electropneumatic valves are a key element of the electropneumatic clutch control system for vehicles of categories N3 and M3. The speed and accuracy of the clutch control system depend on their parameters. When the operating conditions of the solenoid valve change, its initial parameters also change, even before the loss of serviceability. Goal. The goal of the work is to form dependencies that determine the parameters of the control signal for the clutch control system of vehicles of categories M3 and N3 in the conditions of change of supply voltage, pressure drop on the valve and ambient temperature. Methodology. To achieve this goal, an advanced mathematical model and onedimensional optimization method were used to determine the optimal control effect on the electropneumatic valve of the clutch control system. Results. The block diagram of the control pulse in different modes of operation of the electropneumatic clutch control system is given. Based on the calculated data, the characteristic areas of operation of the electropneumatic valve are determined and the purpose for the optimization process is determined. Based on the defined range of data change and the accuracy of finding the optimal value, a rational optimization method is determined. By modeling the operation of the solenoid valve with parameters according to the chosen optimization method, the response surfaces were constructed relative to the control pulse depending on such parameters as supply voltage of the vehicle onboard network, ambient temperature and pressure drop on the solenoid valve. Originality. The error in the reproduction of the theoretical response surfaces based on the parameters of the clutch and the electronic control unit is also determined. Theoretical aspects for providing the required inductance of the solenoid valve coil are shown. Practical value. A method for determining the pressure drop on an electropneumatic valve is proposed. The method takes into account the change in pressure during operation of the clutch control system due to wear of the friction plate. The error in ensuring the duration of the control pulse due to the presence of hysteresis in the operation of the clutch and the executive control device is estimated.

scholarly journals Design of Robust Control System of Magnetic Suspension and Balance System through Harmonic Excitation Simulation

Aerospace ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 304
Author(s):  
Dong-Kyu Lee
Keyword(s):  
Adaptive Control ◽  
Control System ◽  
Power Supply ◽  
Test Section ◽  
Test Object ◽  
Control Algorithm ◽  
Magnetic Suspension ◽  
Electric Power Supply ◽  
Balance System ◽  
Adaptive Control Algorithm

The magnetic suspension and balance system (MSBS) uses magnetic force and moment to precisely control the movement of the test object located at the center of the test section without mechanical contact, and at the same time measure the external force acting on the test object. If such an MSBS is installed around the test section of the wind tunnel so that the position and attitude angle of the test object follow the harmonic function, various vibration tests can be performed on structures subjected to aerodynamic loads without the influence of the mechanical support. Because the control force and moment in the MSBS is generated by a number of electromagnets located around the test section, it is necessary to apply the adaptive control algorithm to the position and attitude control system so that the experiment can be carried out stably despite the sudden performance change of each electromagnet and electric power supply. In this study, a fault-tolerant position and attitude angle control system was designed through an adaptive control algorithm, and the effectiveness was verified through simulation under the condition that the electric power supply of MSBS failed.

Control System of Power Supply in Under-Ground Coal Mining

2006 ◽  
Vol 2 (3) ◽  
pp. 12-19
Author(s):  
G. G. Pivnyak ◽  
Keyword(s):  
Control System ◽  
Coal Mining ◽  
Power Supply

Development of a Damper Control System for Combined Cycle Thermal Gas Power Plant

2014 ◽  
Author(s):  
Amit Kumar Mondal ◽  
Vindhya Devalla ◽  
Vivek Kaundal ◽  
Kamal Bansal
Keyword(s):  
Heat Dissipation ◽  
Pulse Width Modulation ◽  
Low Frequency ◽  
Solenoid Valve ◽  
Combined Cycle ◽  
Solenoid Coil ◽  
Hydraulic Damper ◽  
Wireless Control ◽  
Damper Control ◽  
Gas Power Plant

This paper addresses a technique to solve the problem of heat dissipation in solenoid coil of the solenoid valve which is controlling the hydraulic damper by using pulse width modulation (PWM) switching technique with low frequency. In addition to this damper controlling is achieved via wireless controlling. By using PWM based low frequency switching technique the gas turbine trip will be protected. PWM is achieved by microcontroller and wireless control is done by ZigBee.

Research of H∞ Robust Control for the Giant Die Forging Hydraulic Press’s Synchronous Control System under the Uncertainty Coefficient

2012 ◽  
Vol 190-191 ◽  
pp. 819-824 ◽  
Author(s):  
Ying Jian Deng ◽  
Zhong Wei Liu
Keyword(s):  
Control System ◽  
Robust Control ◽  
Control Algorithm ◽  
Hydraulic Press ◽  
National Defense ◽  
Synchronous Control ◽  
Performance Quality ◽  
System Synchronization ◽  
Uncertainty Coefficient

The giant hydraulic die press is our country national defense and the infrastructure essential equipment, the synchronous control system is the essential device to the giant forging hydraulic press, its synchronization control performance quality is good or bad will directly determine the quality of the product. This article through the proof of the theorem, gives the specific steps to achieve H∞ robust control algorithm. The simulation results show that: this control strategy has good inhibition to the change of system parameters, robustness is very strong, can well eliminate the system synchronization error.

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