Servo control method and control device for linear electric type medium and low frequency excitation device

Abstract

The invention discloses a servo control method and a control device for a linear electric type medium and low frequency excitation device, which integrate a multi-motor combination parallel drive servo control function, an all-digital bus communication function and a static support cylinder pressure control function, and can realize servo control of a medium and low frequency excitation device system in a linear motor drive mode. Speed synchronous control, position differential suppression control and master-slave motor force following control methods are adopted, and strict synchronization of the vibration speed of four motors or double motors is achieved; static support cylinder constant pressure control is introduced, so that the effect of dead weight of a moving part and a product can be achieved, dynamic force output by the linear motor is more symmetrical, and the waveform distortion index in high-precision vibration control is excellent; a universal bus interface based on an EtherCAT bus communication protocol is adopted, a controller and multiple sets of motor drivers form a control looped network, and high-speed real-time transmission and implementation monitoring of multiple paths of signals including force, current, speed, displacement, acceleration and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a servo control method and a control device for a linear electric mid-low frequency vibration device. Background technique [0002] The medium and low frequency vibration test bench is widely used in environmental simulation tests of vehicles, high-speed rail, ocean, and airborne transportation of various products, road simulation tests in various vehicle tests, and earthquake simulation tests in water conservancy, geotechnical, construction and large-scale lifeline projects. , and dynamic fatigue loading test of various products, etc. This type of test bench is widely used in the field of medium and low frequency vibration detection of products or specimens. The development trend of medium and low frequency vibration test technology is from single axis multi axis, single Developing towards multi-point excitation, gradually developing from traditional rough approximatio...

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Problems solved by technology

However, according to market research, no matter whether it is a non-standard customized product or a mature standard, there is no product related to the linear electric medium and low frequency excitation device at home and abroad.

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