Mechanical-electrical-liquid integration control method for multi-actuator system

Abstract

The invention provides a mechanical-electrical-liquid integration control method for a multi-actuator system. The mechanical-electrical-liquid integration control method comprises the following steps: firstly, determining absolute elongations, corresponding to hydraulic actuators, of all action points according to a curvature requirement of a controlled object; secondly, driving a positioning device to safely and accurately operate to reach within an error range of a target value by a servo motor; thirdly, controlling all the hydraulic actuators to perform gradual forming or restoring operation on the controlled object by adjusting a hydraulic direction-changing valve; meanwhile, constraining all operation steps by corresponding safety interlocking control logics; and finally, finishing forming and restoring by the controlled object according to the requirements. The method provided by the invention can be suitable for a control system which adopts a hydraulic cylinder as the actuator, drives the positioning device for accurate positioning by the servo motor and is used for bending special metal flexible plates with fixed lengths; and by means of an integration control method, an existing metal plate bending and forming control mode is changed, the limitations of a traditional die configuration are broken, and precise forming and safe restoration of the controlled object are realized.

Description

technical field [0001] The invention relates to the technical field of sheet metal bending and forming, in particular to an electromechanical-hydraulic integrated control method for a multi-actuator system. Background technique [0002] In addition to the main function of machinery, most of them also have control function, hydraulic function, information function, power function, etc. Microelectronics technology is applied to these functions, so that electronic devices and mechanical devices are organically combined, and the formed system is electromechanical hydraulic integration. . At present, the comprehensive application of electromechanical hydraulic system has become one of the hot issues of research at home and abroad, and great development has been made in its actuator form and system control mode. [0003] Different application fields of electromechanical-hydraulic integration control methods have their own characteristics. For the bending and forming of metal shee...

AI Technical Summary

Problems solved by technology

However, for the forming and restoration of fixed-length special metal flexible plates, it cannot be realized by the control method of traditional hydraulic bending machines: First, the control objects of the traditional method are limited and cannot be applied to metal sheets with large spans; second, the traditional method The metal sheet is mainly configured through the mold, which cannot be applied to the arbitrary configuration requirements of the fixed-length special metal flexible sheet; third, the traditional method is usually one-time forming and does not need to be restored to its original shape, so it cannot be applied to the working conditions of the special metal flexible sheet Require

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