The Study Of Adaptive Inverse Control Methods Under The Vibration-Centrifuge Compound Environment

To forecast the potential failure and improve the reliability of the aerospace facilities, it is of great significance to study the active control methods under the vibration-centrifuge compound environment.The parameters of the vibrator working under the centrifugal environment are difficult to be determined and alter with the rotation speed of the centrifuge. The traditional control ways can not work well. This thesis studies the adaptive inverse control methods of the vibrator system under the centrifugal environment.Firstly, the adaptive model of the vibrator is established by means of the LMS filter, which can track the acceleration response of the vibrator countertop. To achieve better tracking ability of the adaptive model, dithering is employed, and the influence of the number of the taoped weights is also discussed.Secondly, the adaptive inverse model is established offline based on the reproduction of the adaptive model, and the influence of the delayed length is analyzed. Thus, the adaptive inverse control system under the vibration-centrifuge compound environment is accomplished. According to the simulation under the sine and swept excitations, the system outputs are well in accordance with the delayed system inputs.Lastly, three kinds of adaptive noise cancellation methods are proposed, and the MSE of the system under the square excitation is decreased using the third method.