| 摘要 |
PROBLEM TO BE SOLVED: To provide a damping force control device for a suspension that enables improvement of accuracy of estimated relative speed of a damper over a wide range of damping coefficients.SOLUTION: A damping force control device for controlling a damping force control value P of a damper includes: a relative speed estimation device 3 for estimating relative speed of a wheel to a vehicle body; and a damping force calculation device for determining the damping force control value P on the basis of a control input variable and estimated relative speed yob of the vehicle body. The relative speed estimation device 3 estimates damping force on the basis of the estimated relative speed yob and the damping force control value P. Estimated damping force uob is corrected by a delay correction section 6 to obtain estimated damping force ux after delay correction, and based on the estimated damping force ux after delay correction and the relative speed estimation device input variable, the estimated relative speed yob is calculated. The delay correction section 6 corrects the estimated damping force uob on the basis of the damping force control value P, and makes delay correction terms differ from each other so that in a plurality of different damping coefficients of the damper, a gap between actually-measured relative speed and the estimated relative speed yob is made smaller.SELECTED DRAWING: Figure 5 |
