Research on three-point driving and control system of long distance belt conveyor
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摘要: 针对目前带式输送机驱动控制研究忽略了输送带的黏弹性对启动过程的影响、不能较好地模拟带式输送机启动过程的问题，分析了输送带的力学特性及黏弹性模型，并选用Voigt模型对输送带进行建模；利用Simulink与AMESim联合仿真平台，分别对带式输送机的机械部分和电动机控制部分进行建模。根据直接转矩控制原理和协同控制思想设计了长距离带式输送机三点驱动控制系统。该系统采用主从控制策略，以头部驱动电动机为主驱动，其余为从驱动，控制带式输送机头部、中部、尾部3个驱动的输出转速和转矩，使得带式输送机以预设速度曲线平稳启动并运行。仿真结果表明，由于输送带的黏弹性作用及带式输送机加速度不断变化，导致带式输送机的负载转矩不断变化，但带式输送机头部、中部、尾部3个驱动均能很好地跟踪预设的启动速度，说明三点驱动控制系统能够很好地控制带式输送机的启动和运行过程。Abstract: In view of the problems that influence of viscoelasticity of conveyor belt on starting process is neglected in current research on driving and control of belt conveyor, and belt conveyor starting process cannot be simulated well, mechanical properties and viscoelastic model of the conveyor belt were analyzed and Voigt model was selected for modeling of conveyor belt. Simulink and AMESim co-simulation platform was used to establish model of the mechanical part and motor control part of the belt conveyor separately. Three-point driving and control system of long distance belt conveyor was designed according to principle of direct torque control and the idea of cooperative control. The system adopts master-slave control strategy, takes head driving motor as main driver and the rest as slave drivers to control output speed and torque of the three drivers at the head part, middle part and tail part of the belt conveyor, which enables the belt conveyor to start and run smoothly with the preset speed curve. The simulation results show that although load torque of the conveyor is constantly changing due to viscoelastic effect of conveyor belt and the change of acceleration of the conveyor, the three drivers at the head part, middle part and tail part of the belt conveyor can track the preset starting speed well, which indicates that the three-point driving and control system can control the start-up and operation of the belt conveyor well.
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期刊类型引用(3)
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