Method and device for synchronizing crystallizer vibration hydraulic cylinders

Abstract

The invention discloses a method and a device for synchronizing crystallizer vibration hydraulic cylinders. The method comprises the following steps: calculating the amplitude setting values of the hydraulic cylinders according to reference amplitudes and actual amplitudes of two hydraulic cylinders; in a set vibration period, reducing the setting value of the hydraulic cylinder with high actual amplitude or increasing the setting value of the hydraulic cylinder with low actual amplitude, dynamically and periodically adjusting the amplitude error of two hydraulic cylinders so that the amplitudes of the two hydraulic cylinders are the same; calculating position setting values of two hydraulic cylinders according to the amplitude setting values and actual positions of two hydraulic cylinders; and measuring actual positions and actual amplitude values of the two hydraulic cylinders and entering the next circulating period. The positional deviation of the two hydraulic cylinders, caused by the difference of oil paths, hydraulic cylinders, servo valves and the loads is greatly reduced, so as to avoid the horizontal inclination of the crystallizer caused by the unbalance of the two cylinders in the vibration process. The method and the device provided by the invention can guarantee the whole crystallizer vibration device to be operated stably and safely.

Description

technical field [0001] The invention relates to a control method for synchronous position of hydraulic cylinders, in particular to the synchronous control of two hydraulic cylinders on a hydraulic vibration device of a continuous casting machine crystallizer in the metallurgical industry. Background technique [0002] The hydraulic part of the crystallizer hydraulic vibration device is mainly composed of two symmetrical and interchangeable hydraulic cylinders on the left and right. When the two hydraulic cylinders operate, due to the differences in the oil circuit, hydraulic cylinder, servo valve and load, it is bound to cause two The position error of the two hydraulic cylinders, that is, asynchronous phenomenon, will cause the crystallizer to tilt horizontally due to the unbalance of the two hydraulic cylinders. For this reason, it is not only necessary to perform precise closed-loop control on each hydraulic cylinder, but also to carry out synchronous control on the movem...

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Problems solved by technology

For this reason, it is not only necessary to carry out precise closed-loop control on each hydraulic cylinder, but also to carry out synchronous control on the movement of the two hydraulic cylinders. The commonly used master-slave control scheme has disadvantages such as poor synchronization accuracy and slow dynamic response.

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