Controller and control method for controlling multiple groups of oil cylinders with programmable controller

Abstract

The invention provides a controller and a method for controlling a plurality of oil cylinders by using a programmable controller. The controller comprises the programmable controller, a bus interface module and an interface module, wherein the programmable controller is connected with the interface module through a bus interface, and integrates a logic control module, a motion control function and a transmission device parameterization function; the interface module is divided into at least two groups of interfaces which are respectively connected with a proportional amplifier, a proportional valve, an oil cylinder and a sensor in sequence; the programmable controller, the bus interface module, the interface module, the proportional amplifiers, the proportional valves, the oil cylinders and the sensors form the controller for controlling the oil cylinders by using the programmable controller; and mechanical motion parts which are simultaneously driven by a plurality of oil cylinders are connected. By the invention, speed control over a plurality of oil cylinders, accurate position control over the oil cylinders and accurate position control among the oil cylinders can be realized.

Description

technical field [0001] The invention belongs to the field of equipment manufacturing for industrial hydraulic system integration, and particularly relates to a method for automatically and precisely controlling the speed and position of multiple groups of oil cylinders in a hydraulic system by using a programmable controller and a special automatic controller thereof. Background technique [0002] In the hydraulic system, the speed and position of multiple groups of oil cylinders are automatically and precisely controlled. Due to the physical characteristics of hydraulic oil, its response speed and dynamic characteristics are relatively low, and large Hysteresis, resulting in a non-linear area between the given amount and the speed of the execution system, which just affects the positioning accuracy of the hydraulic system. If the nonlinear hydraulic axis is controlled by the model of controlling the linear electric axis, the speed will be unstable, and the position closed l...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a controller and its control method for controlling multiple groups of oil cylinders with a programmable controller, so as to solve the problem of unstable speed and inaccurate position of multiple groups of oil cylinders existing in the control of multiple groups of oil cylinders in the prior art The problem

Images