What Should Consider Before Using Servo System?

Servo system is a commonly used control system, widely used in industrial automation. It compares the output signal with the given reference input signal by means of feedback control, and makes the output signal of the system consistent with the reference input signal by adjusting the output of the controller. After we know what a servo system is, when using the servo system, we need to master some skills to ensure its stable and reliable work.

Proper selection of the type of controller for a servo system is critical. Common servo system controllers include proportional, integral and differential controllers, as well as their combination forms. For different application scenarios, we need to choose the most suitable controller type according to the dynamic characteristics and control requirements of the system. Proportional controllers are suitable for fast response systems, integral controllers are suitable for eliminating steady state errors, and differential controllers are suitable for suppressing system oscillations. When choosing the controller type, it is important to weigh the actual requirements of the system in order to achieve the best control results.

It is also very important to set the control parameters of the servo system reasonably. The control parameters include proportional gain, integral time constant, differential time constant and so on. The setting of these parameters directly affects the system's response speed, steady state error and anti-interference ability. Usually, we can determine the optimal parameter values by means of test and adjustment. When making parameter adjustments, care should be taken to avoid over-adjustment, so as not to cause system instability.

Reasonable selection of sensors for the servo system. The selection of sensors should be based on control requirements and environmental conditions. Common servo system sensors include encoders, displacement sensors, force sensors and so on. Encoders can provide high-precision position feedback signals, displacement sensors can provide position and velocity feedback signals, and force sensors can provide force feedback signals. According to the actual demand, choosing the right sensor can improve the control accuracy and stability of the system.

Reasonable design of the control loop of the servo system. The control loop includes position loop, speed loop and current loop. The position loop is used to control the position of the system, the speed loop is used to control the speed of the system, and the current loop is used to control the current of the system. When designing the control loop, the appropriate control structure and parameters should be determined according to the dynamic characteristics and control requirements of the system. At the same time, attention should be paid to the coordination and coupling between the control loops to ensure the overall performance of the system.

Reasonable selection of servo system actuators. The selection of the actuator should be determined according to the control requirements and load characteristics. Common servo system actuators include servo motors, hydraulic cylinders, pneumatic cylinders and so on. Servo motors are characterized by fast response and high control accuracy, and are suitable for precision positioning and high dynamic response. Hydraulic cylinders and pneumatic cylinders are characterized by large output force and adjustable speed, which are suitable for occasions requiring large output force and fast movement. According to the actual demand, choosing the right actuator can improve the control performance and working efficiency of the system.

The skills of using servo system include reasonable selection of controller type, reasonable setting of control parameters, reasonable selection of sensors, reasonable design of control loop and reasonable selection of actuators. By mastering these skills, we can better apply the servo system to improve the control accuracy and stability of the system to meet the needs of industrial automation.