Multi-hydraulic cylinder synchronization control method

Abstract

The invention discloses a multi-hydraulic cylinder synchronization control method, and the control method comprises the following steps: A, using a controller to judge whether the displacement actualvalue PV of cylinders at a certain time achieves the stroke value or not, if so, leading the set value SP of a PID to be equal to the stroke value; if not, figuring out the set value SP of the PID according to the actual position value PV of the hydraulic cylinders; using the PID algorithm to obtain the set value of the opening degree of a proportional valve according to the SP and the PV, leadingthe proportional valve to carry out movement of a valve core according to the set value of the opening degree and initiating the motion of the hydraulic cylinders; and B, feeding back the actual position value PV of the hydraulic cylinders to the controller and returning to the step A. The synchronization control method does not limit the number of the moving cylinders and does not divide the work of the master moving cylinder and the slave moving cylinders, the motion speed and the precision of the cylinders can be regulated through parameters, the motion speed of the cylinders is not fixed,the target value can be achieved by the fast speed, and the closer the displacement value between the forefront cylinder and the last cylinder is, the faster the overall motion speed is.

Description

technical field [0001] The invention relates to a synchronous control method, in particular to a synchronous control method for multiple hydraulic cylinders. Background technique [0002] Hydraulic components are used more and more in modern metallurgical equipment. They have the characteristics of fast response, high speed, stable action, and high control precision. put forward higher requirements. The hydraulic component is an executive device, and its movement rule depends entirely on electrical professional control. Electrical control must be as safe, stable, fast, and high-precision as possible. At present, the most commonly used synchronous control method is the master-slave method, which is to select one cylinder as the master cylinder, and use the movement of the master cylinder as the basic movement, and the other cylinders are slave cylinders to follow the master cylinder. The master cylinder moves, the slave cylinder moves, the master cylinder moves fast, the sl...

AI Technical Summary

Problems solved by technology

The master-slave method has the following disadvantages: (1) The selection of the master cylinder is difficult. If a relatively poor cylinder is selected as the master cylinder, the movement of all cylinders will be restricted.

The motion accuracy of the cylinder cannot be guaranteed

(3) Since the movement speed is determined by the master cylinder, it is impossible to coordinate the speed matching between the slave cylinder and the master cylinder, and it is impossible to optimize the overall movement speed

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