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Owning to the complex underground mine surroundings, it is extremely hard to treat images with large sums of coal dust noise. So fraction characterization that models with adaptive algorithm in BV space is presented to optimize coal particle image. This article puts on first fractional calculus' theory in BV space for image processing. Pursuant to the regional characteristics, characteristic parameters,...
Coal scraper conveyor is one of the mechanical transport equipments in coal mining industry, whose reliability is directly related to the coal safe production. Therefore the fault diagnosis of the working state is very important. In this paper, a novel fault diagnosis analysis strategy for coal scraper conveyor accident is proposed based on fuzzy set theory and fault tree method. The fault tree model...
In coal gas monitoring system, the early detecting of gas concentration is key technique for preventing the gas explosion because the coal gas signals are very weak under strong noise background in mining digging laneway. In this paper, the coal gas chaotic characteristics of the mine underground are analyzed, the Lyapunov exponent is used to judge the chaotic characteristic of gas weak signal as...
Based on immune algorithm a novel optimization design scheme of PID speed controller parameters is proposed for the coal mine gas monitored control system in this paper. The principle of Immune algorithm is introduced, and the strategy of PID controller parameters based immune algorithm is discussed. According to the response between antigen and antibody, the PID controller parameters are optimized...
Coal gas outburst is very dangerous to mining workers, so the coal gas prediction and control in digging workplace are very important for safety production. In this paper, a novel the radial basis function (RBF) neural network gas prediction model is established to forecast the gas rush in coal workplace. The factors of producing gas are studied and the sample data are acquired from digging field,...
A novel coal gas concentration predication model is introduces based on the chaotic time series theory in this paper. According to the Takens theorem, the gas concentration phase space is reconstructed, the embedded dimension m and the time delay τ are calculated by C-C algorithm, the Lyapunov exponent λ is solved with wolf method, and the time series neural network prediction model is established...
In order to prevent coal power system fault for safety production, a novel power quality real time monitor is researched in this paper. According to the coal power system special characteristics and safety production standard, the harmonic of the coal power system is analyzed first based on the wavelet theory, and then the monitoring system is designed with ARM LPC2132 as the client computer to fulfill...
Based on chaos optimization theory a novel optimization design scheme of PID speed controller parameters is proposed for the mine hoist direct torque control (DTC) system in this paper. The Logistic mapping process from sequence state to chaos state is introduced, and the strategy of chaos optimization PID controller parameters is discussed. According to the ergodicity and random characteristics of...
In the coal gangue automatic selection system, many coal gangue images have been created. It is urgent problem to store and transfer these coal gangue images in real-time processing. An improved embedded zerotree wavelet (EZW) coding algorithm is introduced to compress the coal gangue images in this paper. According to wavelet transform theory, the basic features of wavelet coefficients are analyzed...
The novel fuel injection intelligent control system for SYT240 test platform is introduced in the paper. The design principle is described, the system architecture of the fuel injection automatic testing system is presented, the fuel injection intelligent control system is realized on the basis of PC and AT89C52 single chip microcomputer, and the function relationship of the injection oil capacity...
The coalmine gas hazard affected safety of China coalmine production most. As there were lots of complicated and uncertain factors during gas accidents emergency rescue and making decisions process, accurate decisions can not be drawn by mathematics models with present information monitored by the KJ series monitoring systems such as KJ90, so experiences of former questions were urgently required...
Driven by the compulsory requirement of dilution the deleterious gas immediately in coal well underground laneway for safety production, a novel pulse density modulation (PDM) HF converter for the mining local fanner is introduced in the paper. In this PDM converter, the high frequency technique is employed to minimize the converter cubage owing to the limitation of the small work space in the underground...
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