Active vibration control system and method for inner and outer casings of aero-engine

Abstract

The invention discloses an active vibration control system and method for an inner casing and an outer casing of an aero-engine. The method comprises the steps that vibration transmission paths and characteristics from a rotor to vibration enhancement points of the outer casing and the inner casing are obtained; the position of a vibration applying point of the inner casing is determined, and vibration transmission characteristics from the vibration applying point to a vibration enhancing point of the outer casing and a vibration reducing point of the inner casing are obtained respectively; a piezoelectric energy collector is mounted at a vibration enhancement point of the outer casing; and designing a control law of the vibration applying point of the inner casing and verifying whether the corresponding design meets the performance requirement or not. Aiming at specific-frequency vibration of the inner and outer casings of the aero-engine, the vibration quantity of a vibration reduction point required by the inner casing can be remarkably attenuated, the vibration quantity of a vibration enhancement point required by the outer casing can be increased, piezoelectric energy collection can be realized, specific-frequency vibration fatigue of engine parts is reduced, and the service life of the engine parts is prolonged. And energy can be supplied to part of sensors on the machine, and the method has important value for actual engineering.

Description

technical field [0001] The invention relates to the vibration control of aero-engines, in particular to an active vibration control system and method of the inner and outer casings of the aero-engines. Background technique [0002] In the past ten years, with the continuous development of various communication and storage technologies, wireless sensor network technology has been widely used in all aspects of life. In industrial production, it has the characteristics of high reliability, low cost, wide coverage, and low power consumption, which can bring great convenience to monitoring. At the same time, although the wireless sensor network is easy to use, its maintenance cost is high, and some sensor nodes do not support battery replacement. [0003] The active vibration control in the prior art has the problems of complicated operation, high cost, and high cost of energy supply for some sensors. Vibration is an extremely common physical phenomenon, and if energy can be ha...

AI Technical Summary

Problems solved by technology

At the same time, although the difficulty of using the wireless sensor network is low, its maintenance cost is high, and some sensor nodes do not support battery replacement

[0003] Active vibration control in the prior art has the problems of complex operation, high cost, and high energy supply cost for some sensors

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