Design of Three Closed Loop Control System of Environmental Protection and Energy Saving Sandblasting Machine

Environmental protection and energy saving sandblasting machineThe core of system control is to carry out precise position control, and response speed, flexibility, and accuracy are the main indicators of position control. In order to meet the requirements of these indicators, this control system adopts a position and speed double closed-loop structure; at the same time, according to the requirements of this system for the motor output torque, the current closed-loop adjustment is nested inside the speed loop to obtain a larger constant current starting process. Effectively control the starting characteristics of the motor of the environmental protection and energy saving sandblasting machine and the dynamic process of current and torque.

For the closed-loop structure of the environmental protection and energy-saving sandblasting machine control system composed of speed loop and current loop, the current loop is used as the inner loop, and the speed loop is used as the outer loop. The output of the speed regulator is regarded as the input of the current regulator. Speed ​​and current double closed loop speed regulation system. As the current regulator of the inner loop, in the process of adjusting the speed of the outer loop, its function is to make the current closely follow the change of its given voltage, and the given voltage is the output of the outer loop regulator, which is timely for voltage fluctuations. The anti-disturbance function ensures that the larger current allowed by the environmental protection and energy-saving sandblasting machine motor is obtained during the dynamic speed adjustment process, thereby speeding up the dynamic process. For the closed-loop structure composed of the position loop and the speed loop, the speed loop is used as the inner loop, and the position loop is used as the outer loop, which constitutes a position and speed double closed loop positioning system.

In addition, nonlinearity has a great destructive effect on the performance of the environmental protection and energy saving sandblasting machine control system, and can even cause the system to fail to work normally. According to the peripheral composition of the control system structure, this system is a typical double closed-loop control system. For the influence of parameter changes and disturbances on the system state, in addition to relying on the environmental protection and energy-saving sandblasting machine control system to inhibit itself, software filtering is also required Effective suppression, the interference signal from the outside is regarded as an invalid signal and removed.