Experimental platform used for verifying vibration isolation effect of active control methods

Abstract

The invention discloses an experimental platform used for verifying vibration isolation effect of active control methods. The experimental platform comprises a force sensor, a bearing plate, a floating plate, an actuator, a linear bearing, shaft supporting bases, a rigidity component, a vibration exciter, and a controller. The rigidity component comprises vertical shafts, a first spring, a second spring, a baffle ring, and nuts. The lower surface of the bearing plate is provided with the force sensor, and the upper surface of the bearing plate is provided with the actuator and the two shaft supporting bases. The actuator is provided with the floating plate, and the vibration exciter is corresponding to the floating plate. The floating plate is provided with the linear bearing, and the various vertical shafts pass through the first spring, the linear bearing, the second spring, the baffle ring, and the shaft supporting bases sequentially, and then are connected with the bearing plate, and in addition, the nuts are in a screwed connection with the vertical shafts, and therefore the two springs are in a compressed state. The controller is connected with the force sensor and the actuator, and according to residual force detected by the force sensor, a compensation signal is determined, and according to the compensation signal, actuating force output by the actuator is adjusted. The experimental platform is used for the experimental verification of the vibration isolation effect of the different active control methods.

Description

technical field [0001] The invention relates to the field of vibration detection, in particular to a general experimental platform for experimental verification and comparative evaluation of vibration isolation effects of active control methods. Background technique [0002] Vibration is an extremely common physical phenomenon in industrial production and people's life. With the development of science and technology, especially ultra-precision equipment, people have higher and higher requirements for the vibration environment, vibration characteristics of products and structures. Vibration active control means that in the vibration control process, according to the detected vibration signal, a certain control strategy is applied, after real-time calculation, and then the actuator is driven to exert a certain influence on the control target, and the vibration level of the system is limited to the minimum. Limit or minimum allowable degree. Because of its good vibration suppr...

AI Technical Summary

Problems solved by technology

For example, the common multi-degree-of-freedom coupling active vibration isolation platform has a complex mechanical structure and has high requirements for algorithms. The characteristics of multi-degree-of-freedom coupling make it only suitable for some specific active control algorithms, not for all algorithms The comparison between the effects

For the existing single-degree-of-freedom vibration isolators, in order to achieve the optimal vibration isolation effect, most vibration isolators adopt the active and passive integration method, and passive vibration reduction devices are added to the system, such as rubber pads and other damping elements. The final vibration isolation effect is the result of the joint action of passive vibration reduction devices and active vibration isolation algorithms. Therefore, the existing single-degree-of-freedom vibration isolators are not suitable for verifying the vibration isolation effects of different algorithms.

Moreover, the components used in the existing vibration isolators are generally selected to ensure engineering practicality, which are relatively complicated, and the linearity is not high, and there are unknown quantities. Although many algorithms such as fuzzy control have been designed for this nonlinear and unknown system, But it is inappropriate to use this system as a general experimental platform to evaluate various algorithms

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