| 摘要 |
PROBLEM TO BE SOLVED: To remove effects of a high frequency noise added to the control input for controlling the damping force of a damper of a suspension device by a simplest constitution. SOLUTION: When a target current for adjusting the damping force of the damper of the suspension device is determined based on a damper speed which is obtained by the time-differentiation of a damper displacement, as the high frequency noise is added in a procedure for obtaining the damper rate, the high frequency noise is added to the target current which is determined by using the damper rate as well, and the switching of the damping force of the damper is frequently performed, and causes noises. However, the effects of the high frequency noise are eliminated by filtering the target current by using a filter which makes a frequency in a nonsuspended resonance region of the suspension device pass, and noises can be reduced by preventing the switching of the damping force of the damper from being frequently performed. Also, the effect of a new frequency noise which is added when the target current is obtained from the damper rate can be eliminated as well, and the damping force of the damper can accurately be controlled. COPYRIGHT: (C)2007,JPO&INPIT |
