A Torque Control Method of Bolt Wrench Based on Fuzzy PID

Abstract

The invention discloses a fuzzy PID-based bolt wrench torque control method. The method analyzes the torque output characteristics of a DC brush motor, combines Newton's second law and the motor torque balance equation to establish a mathematical model, and then uses a fuzzy PID controller as the rotational speed. The outer loop regulator, the inner loop adopts the current control loop of PID algorithm, uses the current sensor and Hall speed sensor to collect the current and speed during the motor rotation, and can accurately calculate the torque and control the output through the mathematical model. The present invention adopts the fuzzy control algorithm to adjust the PID control parameters. On the one hand, it can effectively reduce the fluctuation of each parameter in the operation of the system and improve the accuracy of parameter acquisition; Tighten" question.

Description

technical field [0001] The invention belongs to the technical field of fuzzy control in automatic control, and in particular relates to a fuzzy PID-based bolt wrench torque control method. Background technique [0002] In the erection of power system transmission towers, fastening between mechanical fasteners is usually required. In the process of assembling bolts, the occurrence of "undertightening" and "overtightening" will cause damage to or even scrap the mechanical parts. Therefore, it is necessary to control the necessary torque of the bolts to ensure the reliability of the connection. However, due to the inability to provide large torque and low control precision, the mechanical wrench cannot meet the requirements in the construction of the transmission tower, and the traditional torque control method mostly uses a torque sensor for torque monitoring. The working environment of the wrench is harsh, and there is a lot of electromagnetic interference in the external en...

AI Technical Summary

Problems solved by technology

However, due to the inability to provide large torque and low control precision, the mechanical wrench cannot meet the requirements in the construction of the transmission tower, and the traditional torque control method mostly uses a torque sensor for torque monitoring. Although the torque output can be accurately controlled, due to the The working environment of the wrench is harsh, and there is a lot of electromagnetic interference in the external environment. The torque sensor is likely to display errors or even lose control due to errors in the collected data, which has great potential safety hazards.

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