工矿自动化

Wavelet Transform and Its Application in the Fault Diagnosis of the Open-circuit Rotor for Asynchronous Motor

DONG Ai-hua, KANG Run-sheng, AI Yong-le, WANG Fang

2002, 28(2): 1-4.

<Abstract>(23)

Abstract:
The paper mainly discusses the basic theory of wavelet transform, introduces the application of wavelet transform in the fault diagnosis of the open circuit rotor for asynchronous motor, and gives the construction of signal detected circuit.

DCS Control of the Cement Grinding System

CHEN Er-kui, TAN De-jian, MA Fang-qing

2002, 28(2): 4-7.

<Abstract>(38)

Abstract:
The paper introduces the DCS realizing methods of cement grinding system, and mainly discusses the automatic control of batch and intelligent control of the load of cement mill. Practical application shows that the control system improves the accuracy of the combined feeding and the load of the cement mill, which has high reliability and the remarkable benefit.

Radio Transmission Characteristic of UHF Band in Empty Rectangular Entry

SUN Ji-ping, SHI Qing-dong

2002, 28(2): 7-9.

<Abstract>(27)

Abstract:
The paper introduces the basic methods and principle of electromagnetic waves propagation of UHF band in empty rectangular entry, and gives the formulas of electromagnetic waves attenuation, then it discusses the electromagnetic transmission characteristic in the entry with these formulas.

Application of Modeling Approach Based on Fuzzy Neural Network in the Recognition System for Coal Gangues

LI Qiang, KONG Li, CHENG Wei, LIU Wen-zhong

2002, 28(2): 10-13.

<Abstract>(70)

Abstract:
The paper introduces the composition of the recognition system for coal gangues and the modeling approach based on standard fuzzy neural network. How to construct the real time separation system with this approach is described with the artificial test. The results of the experimental and theoretical studies demonstrate this system can be satisfied with the design require and has a certain effectiveness.

A Robust MRAC Scheme of Speed Regulating System for Mine Hoist

WU Zhong-qiang, LU Zhi-gang

2002, 28(2): 14-16.

<Abstract>(21)

Abstract:
A new robust MRAC has been designed for speed regulating system of mine hoist in view of existing situation of parameter perturbation and disturbance. This controller suits for arbitrary relative orders system and needs not the additional signal, which has simple structure and is convenient for engineering use.

Optimization Design for Linkage Gear with Oil-cylinder Based on Modified Genetic Algorithms

RONG Xue-wen, LI Yun-jiang, ZHANG Zhi-xian, ZHU Su-ning

2002, 28(2): 16-18.

<Abstract>(25)

Abstract:
In order to keep the parallel relation between the longitudinal feed gear and tunnel centerline, a link gear with oil cylinder is adopted. And modified genetic algorithms is used for optimization design. The modified genetic algorithms is suit to all constrained optimization problems of nonlinear for it uses floating point code and adopts penalty functions to deal with the equation and inequation constraints.

Performance Analysis of CDMA System for MMSE Adaptive Detector

WEI Hui-min, WANG Jun, WEI Li

2002, 28(2): 19-22.

<Abstract>(43)

Abstract:
The performance of minimum mean square error (MMSE) adaptive detector applied in CDMA system is analyzed in this paper. The signal model is set up, and the relevant bit error rate formulas are given. The system performance of MMSE adaptive detector is compared with that of optimal single user. It is concluded that the performance of MMSE adaptive detector is better than that of optimal single user. Finally the computer simulation result is given.

Closed-loop Control of Fast Ash Signal for Jig

LIU Jian-rong, LI Hong-qing, GE Wen-feng

2002, 28(2): 22-25.

<Abstract>(33)

Abstract:

Design of an Embedded DC Control and Monitoring Device Based on the PC104 Industry Controller

YANG Gong-xun , ZHOU Chun-liang , YANG Yan-cong , QU Peng-yu

2002, 28(2): 25-27.

<Abstract>(11)

Abstract:
The paper briefly introduces the PC104 bus standard and presents the design of software and hardware of an embedded DC control and monitoring device which is used in transformer station.

Application of PC in the United Control System of Gas Turbine

ZHOU Dong, LIU Fu-zeng, ZHAO Xue-xi

2002, 28(2): 28-29.

<Abstract>(17)

Abstract:

Application of Hydraulic Tensioning Technology and Soft Start Controller Technology on Belt Conveyor

SONG Bao-sheng, LI Qing-tang, FENG Yu

2002, 28(2): 30-31.

<Abstract>(17)

Abstract:

Digitized Reform of Electric Control System for Hoist of No.2 Auxilliary Shaft in Yaoqiao Coal Mine

JIANG Hua, CHEN Wei-xin, JIANG Jian-guo, WU Xiao-jie, MA Wen-zhi, SHAO Zhong-ming

2002, 28(2): 31-33.

<Abstract>(17)

Abstract:

Measuring Device for Flow of Microagent

XUE Wei-dong

2002, 28(2): 34-35.

<Abstract>(31)

Abstract:
In flotation automation system, the measure of agent flow is important in order to ensure accurate affixation of flotation agent. The paper introduces a device which using transdacer with microdifferential pressure to measure flow and its working principle. It also gives the design of pipeline of agent measuring.

Using Isolation Way of Tone Transformer to Realize Remote Data Transmissio

ZHANG Jin-bo, HU Gang, ZHANG Xue-wu

2002, 28(2): 36-37.

<Abstract>(15)

Abstract:
The paper analyzes the reason why remote data transmission adopts baseband way and the factors of effecting the transmission between data point and multipoint. It also introduces the realizing method of remote data transmission with isolation way of tone transformer.

Serial Communication Technology of Visual Basic

LI Xiang-jiang, ZOU Xiao-mei

2002, 28(2): 38-39.

<Abstract>(34)

Abstract:

Simple Analysis of Operating Overvoltage of Vacuum Braking Device and Its Protective Measure

ZHOU Li, LI Jin-peng

2002, 28(2): 40-42.

<Abstract>(16)

Abstract:

Calculation of Starting Time of Soft Start Controller for Motor

CHEN He-qua