ACTUATOR DRIVE CONTROL DEVICE FOR POSITIVE TYPE VIBRATION-PROOF SUPPORT

摘要

PROBLEM TO BE SOLVED: To control a positive type vibration-proof support with favorable precision by correctly estimating vibrating states of an engine in a case where engine speed is increased or decreased. SOLUTION: In this device, accumulated time of time intervals tn of eight crank pulses outputted every 15°crank angle in a vibration cycle equivalent to 120°crank angle, and average accumulated time indicated by a straight line connecting a start point and end point of a line of the accumulated time are determined, and the average accumulated time is subtracted from the accumulated time to determine eight values of deviationΔtn. Since fluctuation waveform of the deviationΔtn equivalents to fluctuation waveform of the time intervals tn of the crank pulses caused by engine vibration only after effects of fluctuation of engine speed Ne are eliminated, an actuator for the positive type vibration-proof support is controlled based on the engine vibration estimated based on fluctuation waveform of the time interval tn. Vibration-proof functions of the positive type vibration-proof support can thus be effectively achieved. COPYRIGHT: (C)2005,JPO&NCIPI