Advance Control Experiment of Vibration Machine with High Vibration Intensity Based on SCM – Dynamics Characteristics and Advanced Control

2014 ◽  
Vol 912-914 ◽  
pp. 554-558
Author(s):  
Xiao Lan Yang ◽  
Ji Feng Liu ◽  
Meng Nan Si ◽  
Jia Wei Li ◽  
Biao Huang
Keyword(s):  
Frequency Conversion ◽  
Frequency Converter ◽  
Vibration Exciter ◽  
Vibration Machine ◽  
Vibration Intensity ◽  
Strongly Nonlinear ◽  
Advanced Control ◽  
Vibration Stress ◽  
Double Mass ◽  
Intensity Characteristic

The vibration-stress field could be formed by high vibration intensity in vibration machine to improve the ability of the collision, shock, shear and extrusion for the system, and it also can avoid plugging screen for vibration screening machine, which could make for solving some special requirements of the vibration machine. To research the vibration machines strongly nonlinear and high vibration intensity characteristic such as certain excitation and uncertain response, the vibration machine with its double-mass is built, and its vibration exciter uses two partial blocks as vibration motor. In addition, dynamic vibration differential equation is established. To achieve high vibration intensity results based on the vibration machines safe working, the advanced control based on the SCM and Intelligent frequency conversion is put forward, and the advanced control system with its host computer, frequency converter, SCM, charge-amplifier, sensor and the vibration machine is been established.

Research on Advance Control of Chaotic Vibration Mill with High Vibration Intensity - Base on PLC Experimental Analysis

2013 ◽  
Vol 655-657 ◽  
pp. 1465-1468 ◽  
Author(s):  
Xiao Lan Yang ◽  
Ji Feng Liu ◽  
Min Ping Jia ◽  
Jing Chao Zou ◽  
Fang Min Xv
Keyword(s):  
Control System ◽  
Experimental Analysis ◽  
Frequency Conversion ◽  
Key Technology ◽  
Vibration Intensity ◽  
Special Operations ◽  
Chaotic Vibration ◽  
Advanced Control ◽  
Control Decision ◽  
Vibration Mill

Some special operations of chaotic vibration mill require not only has a certain frequency high vibration intensity but also can effectively control overtime and over-limited of vibration intensity. The validity of advanced control decision is key technology for chaotic vibration mill to achieve some special operations such as super-hard and superfine grinding. Through the application based on the intelligent frequency conversion of PLC advanced control system, the high vibration intensity exceeds 15 presents discontinuously and the transient super-high vibration intensity exceeds 20 presents 3 times shortly. By comparing with conventional vibration mill, it shows that the advance control system can control high vibration intensity effectively, and the engineering effects of the deaggregation and refinement of super-hard and superfine grinding is obtained.

Frequency Conversion Control for Vibration Mill with High Vibration Intensity Based on Multi-Wave Variable Sinusoid

2012 ◽  
Vol 538-541 ◽  
pp. 2504-2507
Author(s):  
Xiao Lan Yang ◽  
Min Ping Jia ◽  
Jing Chao Zou ◽  
Ji Feng Liu ◽  
Fang Min Xv
Keyword(s):  
Frequency Conversion ◽  
Digital Conversion ◽  
Vibration Machine ◽  
Key Technology ◽  
Vibration Intensity ◽  
Wave Variable ◽  
Action Time ◽  
On Line ◽  
Useful Life ◽  
Vibration Mill

The key technology of vibration machine to finish deaggregation and powder refinement is both high vibration Intensity with a certain frequency and steady vibration of frequency conversion control. A frequency conversion control for vibration mill system based on multi-wave variable sinusoidal frequency ascending and descending cycle curve was developed. The frequency conversion control test of vibration mill was finished through sensing signal amplification, analog digital conversion and on line detection. The results show that the high and super-high vibration intensity with certain action time is produced and the effect of multi-amplitude and multi-frequency is acquired. The experimental data show that the super micro grinding of superfine particles is achieved, energy consumption is reduced, the useful life of wearing parts such as bearing is extended, and engineering effects of deaggregation and refinement of super-hard superfine powder are obtained by frequency conversion control.

Research on Advance Control of Chaotic Vibration Machine with High Vibration Intensity (I) - Mechanical Properties and PLC Control Decision

2014 ◽  
Vol 610 ◽  
pp. 489-492
Author(s):  
Xiao Lan Yang ◽  
Ji Feng Liu ◽  
Han Song Yang ◽  
Bing Zhi Kong ◽  
Jia Wei Li ◽  
...  
Keyword(s):  
Extreme Points ◽  
Effective Control ◽  
Vibration Machine ◽  
Vibration Intensity ◽  
Chaotic Vibration ◽  
Plc Control ◽  
Advanced Control ◽  
Control Decision ◽  
Online Monitor ◽  
Vibration Mill

The effective control of high-vibration intensity frequency and its overtime and over-limited is a bottleneck technology of chaotic vibration machine to finish specific operation. A PLC advance control system based on intelligent frequency is developed. Prediction of the possible vibration intensity extreme points and its distribution are processed data mining and prediction by sensor signal amplification, analog-digital conversion, and online monitor. Moreover, advanced control of the overtime and over-limited vibration intensity is achieved by constraint conditions correction and real-time feedback. The advanced control results can be verified by comparing grinding effect of conventional vibration mill with that of advanced control vibration mill. Further, the deaggregation and refinement of super-hard and superfine grinding can be achieved.

scholarly journals Resonance overvoltage control algorithms in long cable frequency conversion drive based on discrete mathematics

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 408-418
Author(s):  
Yonghong Deng ◽  
Quanzhu Zhang
Keyword(s):  
Mathematical Model ◽  
Control Strategy ◽  
Frequency Conversion ◽  
Balance Control ◽  
Frequency Converter ◽  
Active Power ◽  
Drive System ◽  
Discrete Mathematics ◽  
Power Controller ◽  
Capacitor Voltage

AbstractIn order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance overvoltage control algorithm of the long cable VVVF system based on discrete mathematics is studied. First, the long cable frequency conversion drive system is established. In order to ensure voltage loss in the range of motor requirements, a frequency converter–cable–motor (ICM) system connection mode is used to maintain the system operation. Based on the research of the capacitor voltage balance control strategy of a long cable frequency conversion drive system, the discrete mathematical model of the AC side of the ICM system is established by using this control strategy. The improved constant active power controller is obtained by establishing the mathematical model, and the resonant overvoltage in a long cable frequency conversion drive is realized by using the constant active power controller. The experimental results show that the algorithm can effectively control the resonance overvoltage phenomenon in the long cable frequency control system, and the control accuracy is over 97%. It has good performance and can be applied in practice.

scholarly journals Soliton crystal 50G Hz micro-comb for Q-band microwave frequency conversion

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Frequency Conversion ◽  
Frequency Converter ◽  
Microwave Frequency ◽  
Local Oscillator ◽  
Rf Power ◽  
Potential Cost ◽  
Frequency Converters ◽  
Spurious Suppression ◽  
Good Agreement

We report a broadband microwave frequency converter based on a coherent Kerr optical micro-comb generated by an integrated micro-ring resonator. The coherent micro-comb displays features that are consistent with soliton crystal dynamics with an FSR of 48.9-GHz. We use this to demonstrate a high-performance millimeter-wave local oscillator at 48.9-GHz in the Q-band for microwave frequency conversion. We experimentally verify the microwave performance up to 40 GHz, achieving a ratio of −6.8 dB between output RF power and IF power and a spurious suppression ratio of > 43.5 dB. The experimental results show good agreement with theory and verify the effectiveness of microwave frequency converters based on coherent optical micro-combs, with the ability to achieve reduced size, complexity, and potential cost.

Applied Research on the Closed-Loop Control of Oil Production System with Progressing Cavity Pump

2012 ◽  
Vol 248 ◽  
pp. 119-123
Author(s):  
Duan Yin Zhu ◽  
Jian Ning Xu ◽  
Yan Xiong Gao ◽  
Wen Jie Lv
Keyword(s):  
Production System ◽  
Closed Loop ◽  
Frequency Conversion ◽  
Rotation Speed ◽  
Frequency Converter ◽  
Dynamic Change ◽  
Oil Production ◽  
Closed Loop Control ◽  
Loop Control ◽  
Highly Efficient

It aimed to dynamic change of oilfield productivity, maked sure that the progressing cavity pump is working in a highly efficient region. It combined variable frequency conversion technology and dynamic liquid level height control technology, the closed-loop control of oil production system with progressing cavity pump is made up of rotation-speed and torsion sensor, stepless motor, frequency converter, PLC and progressing cavity pump. The result show that the system can control the pump submergence depth by adjusting the rotation-speed and torsion of polish rod, and make sure the pump working in a highly efficient region finally. This system also can increase recovery efficiency and pump service life.

Application of Frequency Converter Driver in Long Belt Conveyor

2011 ◽  
Vol 340 ◽  
pp. 19-22 ◽  
Author(s):  
Guo Huan Lou ◽  
Hai Li Yin ◽  
Shu Jie Li
Keyword(s):  
Frequency Conversion ◽  
Frequency Converter ◽  
Belt Conveyor ◽  
Long Distance ◽  
Adjustable Speed Drive ◽  
Constant Torque ◽  
Start Up ◽  
Torque Load ◽  
Adjustable Speed ◽  
Synchronous Drive

With the frequency converter for driving belt conveyor, the synchronous control of torque and speed for the belt-drive unit can be achieved and the start-up characteristics of belt conveyor can also be improved. This paper uses two methods for achieving synchronous drive of belt conveyor, one is synchronization through master-slave control of frequency converter itself, the second is adding external algorithm implemented by PLC systems. This article describes a variable-frequency adjustable-speed drive system used for long distance belt conveyor in mine main inclined shaft or ground. This frequency conversion device and system can be applied to the adjustable-speed drive process of constant torque load for conveyor.

Design of Small Step Frequency Conversion Module in S Band

2012 ◽  
Vol 263-266 ◽  
pp. 152-156
Author(s):  
Yong Xie ◽  
Sheng Liang ◽  
Gao Feng Pan ◽  
Jun Xue
Keyword(s):  
Design Problem ◽  
Main Part ◽  
Frequency Conversion ◽  
Frequency Converter ◽  
Small Step ◽  
Step Frequency ◽  
Two Stage ◽  
Conversion Technology

The small step frequency conversion module is an important unit for a type of simulation equipment. This paper tries to design a kind of small step frequency conversion module which solves the design problem of frequency converter in simulation equipment. The study of small step frequency conversion technology is the main part in this paper. It is using two-stage PLL and DDS which sets frequency and controls step, to meet the design need.

Numerical Simulation and Experimental Analysis of an Active Hydraulic Excitation System Based on Pulsating Flow

2011 ◽  
Vol 295-297 ◽  
pp. 2216-2222 ◽  
Author(s):  
Zi Ming Kou ◽  
Hui Xian Zhang ◽  
Juan Wu ◽  
Chun Yue Lu
Keyword(s):  
Numerical Simulation ◽  
Frequency Converter ◽  
Experimental System ◽  
Computer Code ◽  
Hydraulic Cylinder ◽  
Pulsating Flow ◽  
Vibration Exciter ◽  
Rotary Speed ◽  
Vibration Wave ◽  
Vibration Parameters

A vibration wave generated actively by hydraulic vibration exciter was studied, and an experimental system based on the theory of water hammer was designed. The new developed vibration exciter is driven by the motor whose rotary speed can be adjusted by frequency converter, by means of which transient pulsating flow is generated regularly. Consequently the piston of hydraulic cylinder is driven periodically with the rotation of vibration exciter. Furthermore, mathematical model was established by the method of characteristics and computer code was developed to calculate numerical solution. The simulation results show that there are different flow velocities distributed at every cross section along the pipe. Measured data is basically consistent with the numerical simulation, which indicates that the vibration parameters of hydraulic cylinder can be controlled effectively.

The Design of Motor Energy-Saving Controller Based on the Frequency Converter

2014 ◽  
Vol 551 ◽  
pp. 509-513
Author(s):  
Song Liu ◽  
Lian Zhi Jiang
Keyword(s):  
Remote Control ◽  
Data Collection ◽  
Energy Saving ◽  
Control Algorithm ◽  
Frequency Conversion ◽  
Frequency Converter ◽  
Actual Situation ◽  
Water Pump ◽  
Control Room

This paper introduces a kind of motor frequency conversion energy-saving controller used for fan and water pump loads. Motor energy-saving controller mainly consists of two parts, controller and driver. The main functions of the controller are data collection, control algorithm and communication. The driver is mainly composed of inverter, switch and display instrument. According to the actual situation, if it needs a remote control, we can configure the remote console in the control room, in order to realize the remote control.

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