Vibration active control testbed

Abstract

The present invention discloses a vibration active control testbed. The vibration active control testbed comprises a base plate, two optical axes symmetrically and vertically fixed at the base plate,a door-shaped support located between the two optical axes, and an adjustable motor vibration device fixedly arranged at the top end of the door-shaped support, sliding bearings sliding up and down along the optical axes are respectively fixed at the middle portions of the two outer sides of the door-shaped support, a plurality of replaceable combined mass blocks are fixedly arranged at the bottomend of the door-shaped support, a plurality of bolt through holes configured to install an active vibration absorber are uniformly arranged at the upper end faces of the combined mass blocks, and spring connection mechanisms connected and fixed on the base plate or actively suspended counterbore holes are uniformly arranged at the lower end faces of the combined mass blocks. The vibration activecontrol testbed is simple and reliable, simple to operate, high in flexibility, visual in effect and low in cost, can be used for verification of the vibration reduction effect of the active vibrationabsorber and the active suspension, and is large in reconstruction space, wide in application range and low in manufacturing cost.

Description

technical field [0001] The invention relates to a vibration control test bench, in particular to an active vibration control test bench. Background technique [0002] Reducing the vibration and noise of the vehicle at idling speed and driving has always been the tireless pursuit of practitioners in the automotive industry, and the powertrain mount and shock absorber are an important part to reduce vehicle vibration. Testing and verification of the effectiveness of the control algorithm. For parts companies, universities or research institutes, due to the limitation of manpower and material resources, it is not realistic to directly load the parts into the vehicle for verification. Therefore, it is necessary to design a It is very necessary to have a test bench for performance testing of controllers and effective verification of control algorithms. [0003] Traditional vibration master control test benches are mostly based on MTS equipment, vibrators or three-phase synchrono...

AI Technical Summary

Problems solved by technology

The active vibration control test bench based on MTS equipment uses the MTS actuating head as the excitation source of the vibration. A spring mass system and an active vibration absorber can be installed on the upper end of the MTS actuating head to test the vibration reduction performance of the active vibration absorber, or on the MTS actuating head The active mount is installed at the lower end, and the force transmitted to the base through the active mount is collected at the same time to test the dynamic characteristics of the active mount. The active vibration control test bench based on MTS equipment has the advantages of simple structure and intuitive effect, but the disadvantage is that the MTS equipment is too Expensive, the high price is unbearable for universities, scientific research institutes and general parts companies, and the operation of MTS equipment is complicated, which requires professional operators to master, and the practicability is not high

In addition to using MTS as the excitation source, the exciter can also be used as the excitation source. Compared with the MTS equipment, the exciter is smaller and the price is much cheaper. However, the disadvantage of using the exciter as the excitation source is that the exciter The amplitude that can be provided is limited, and the corresponding controller needs to be matched with the exciter, which also increases the cost of the whole equipment

In addition, the three-phase synchronous motor-based active vibration control test bench uses a three-phase synchronous motor to drive a pair of eccentric masses as the excitation source. In order to offset the generated excitation force in the horizontal direction, only the excitation force in the vertical direction is generated. , a set of gearbox is needed between the three-phase synchronous motor and the eccentric mass. The gearbox has an input shaft and two output shafts. The input shaft is driven by the three-phase synchronous motor, and the two output shafts drive the two eccentric masses to rotate. In this gearbox, the two eccentric masses rotate in opposite directions at the same speed, and only generate excitation force in the vertical direction. The disadvantage of this test bench is that a set of matching gearboxes needs to be specially designed. Bulky, slightly insufficient in terms of equipment flexibility and cost control

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