Self-adaptive piezoelectric shunt semi-passive control device and method controlled by shafting vibration

Abstract

The invention provides a self-adaptive piezoelectric shunt semi-passive control device and a method controlled by shafting vibration. The self-adaptive piezoelectric shunt semi-passive control devicecomprises a piezoelectric shunt circuit, a power supply device and a self-adaptive adjusting circuit. The self-adaptive adjusting circuit is connected with the piezoelectric shunt circuit, a voltage probe is adopted to measure a plurality of voltages in the piezoelectric shunt circuit in real time, the difference or product result of the measured voltages is taken as a basis parameter for the self-adaptive regulation according to voltage characteristics in the circuit under optimal parameters, and the piezoelectric shunt circuit is adjusted. By monitoring voltage parameters (or products, differences, etc.) in a negative capacitance circuit, the regulation rules are given according to the characteristics of the voltage parameters, and the real-time voltage is output to adaptively adjust thecircuit controllable resistance parameters in a double negative capacitance circuit, so that the characteristics of the negative capacitance always meet the optimal parameters, and the self-adaptiveregulation control is realized.

Description

technical field [0001] The invention relates to the technical field of ship vibration reduction, in particular to an adaptive adjustment piezoelectric shunt semi-passive control device and method for longitudinal and lateral vibration control of propeller shafting. Background technique [0002] The propeller rotates in an uneven and unsteady flow field. While generating static thrust, it will generate fundamental frequency and double frequency excitation force line spectrum components related to the rotational speed and the number of blades, and a random broadband with a gradual attenuation with frequency. The former will cause the hull structure to vibrate and produce underwater acoustic radiation through the shafting transmission; the latter will excite the eigenmodes of the propeller-shafting-hull coupling system, both of which will form a prominent characteristic spectrum. [0003] At present, the vibration control methods used on the propulsion shafting include longitud...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the prior art, in order to suppress the defects of propulsion shafting in low-speed and high-speed, low-frequency longitudinal and transverse bending vibration modes, and vibration modes of the propeller under different working conditions and complex environments, the present invention The purpose is to provide an adaptive adjustment piezoelectric shunt semi-passive control device for shaft vibration control

Images