To overcome limitations of current designs of hydraulic supports based on conventional physical prototype, we propose a virtual prototyping based design mode for hydraulic supports. In this study, a 3D numerical model of hydraulic support was established by numerical simulations and stress distributions...

In this paper a simulation of direct torque control for five-phase PM motor has been designed. The modeling of Five-phase PMSM is based on three-phase PMSM..The prototyping platform system uses Matlab/Simulink. A graphical programming interface with hardware-in-loop design process for testing the algorithms...

In the Complex service environment, the surface of coiled tubing has different degrees of defects, which can easily lead to the stress concentration on the surface of coiled tubing and cause premature fatigue failure of the tubing. In order to estimate the fatigue life of coiled tubing more accurately,...

In view of large deformation of return air roadway in No. 10 coal mine, this paper puts forward a new support of D section steel tube filled with concrete. In this paper, method of numerical simulation has been used to analyze the effect of this support. Based on compression simulation of circular ring,...

This paper discuss the features of reactive power compensation in electrical networks of coal open-cast minings. The authors calculated the value of the reactive power consumed by the network elements. It is established that synchronous motors are able to compensate about 40% of the total reactive power...

The study reviews the developed model of deformations accumulation and depletion of the metal plasticity reserve at the cyclic fatigue life stage. Such model is based on the ideas relating to the index of stress state scheme and consistent in terms of physics. It is shown that the type and numerical...

In mining minerals by open-cast method, the environment is exposed to a powerful man-made impact, a significant part of which is associated with mass explosions during rock crushing. In preparation of rocks for excavation by blasting, a significant amount of dust and gases is emitted into the atmosphere;...

In article the approach to identification of defects roller bearings used in the various parts and components of mining machinery and equipment based on the wavelet transform of the vibro-acoustic signals generated by the various defects arising in the supporting elements of power transmission, transforming...

a feature of the Geokhod with cutting drum leads to inequality of the cutter feed speed to face. For this reason, the number of cutters cannot be the same in all cutting lines and will increase as the distance of cutting line from the center of geokhod to the periphery. The variability of possible schemes...

The article is devoted to the research of strength properties of single abrasive grits of various shapes. The existing methods for determining the strength of abrasive materials are analyzed. Data are presented on the pattern of stresses arising in abrasive grits under various schemes of applying loads...

belt conveyors are widely used in various transport systems. The major cost for their operation consists, most often, of the means for rollers maintenance especially when belt conveyors are in the dusty explosive environment, for example, in mining industry. To prevent or reduce probability of fires,...

In this paper, the second order sliding mode control law was designed based on the super-twisting algorithm and the switching function sign(s) was replaced by the saturation function sat(s) for the torque and flux controller in the permanent magnet synchronous motor double closed loop control system....