Abstract
In order to extend the service life of the long-chain gear transmission system of a drum shearer, an electro-mechanical coupling model of a drum shearer cutting unit is established. The model considers the dynamic characteristics of the motor, time-varying meshing stiffness, as well as the drum load characteristics. Additionally, the dynamic characteristics and control strategy for suppressing the dynamic load of the gear transmission system under impact load are investigated based on this model. Firstly, the influence of the gear transmission system of the drum shearer cutting unit under impact load is analyzed. Then, on that basis, the active control strategy based on motor torque compensation is proposed to suppress the dynamic load of the gear transmission system caused by mutational external load. Finally, the suppression effect on the dynamic load of the gear transmission system is analyzed. Research results indicate that this control strategy has good control effects to suppress the dynamic load caused by a mutational external load, which confirms the effectiveness of the proposed control strategy.
Highlights
Long-wall mining is a special mining method that has high coal productivity and smooth operation
In order to suppress the dynamic load of the gear transmission system under an impact load, an active control strategy based on motor torque compensation is proposed based on several factors including the basis of the given target electromagnetic torque from the PI controller of the direct torque control (DTC) and additional torque that is opposite of the direction of torsional vibration of the elastic wrench moment axle load
The influence law of the dynamic load of the gear transmission system of the drum shearer cutting unit under an impact load is obtained in order to extend the service life of the long-chain gear transmission system of the drum shearer cutting unit
Summary
Long-wall mining is a special mining method that has high coal productivity and smooth operation. Substantial research has been conducted into the torsional vibration characteristics caused by mutational external loads within electro-mechanical coupling systems such as wind driven generators, automobiles and rolling mills. RESEARCH ON DYNAMIC LOAD CHARACTERISTICS AND ACTIVE CONTROL STRATEGY OF ELECTRO-MECHANICAL COUPLING POWERTRAIN OF DRUM SHEARER CUTTING UNIT UNDER IMPACT LOAD. Related research on the influence of the dynamic load characteristics of the gear transmission system of the drum shearer under impact loads and the control strategy to suppress the dynamic load of the gear transmission system is rarely reported. In order to adjust to the complex and changing cutting condition and extend the service life of the gear transmission system of the drum shearer, it is essential to study the influence law of the dynamic load of the gear transmission system under impact loads as well as the control strategy for suppressing dynamic load by controlling the cutting motor. The suppression effect on the dynamic load of the gear transmission system under impact loads is studied
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