Title:
サスペンション制御装置
Document Type and Number:
Japanese Patent JP4747436
Kind Code:
B2
Abstract:
By passing the vertical acceleration through a phase adjusting filter and a gain adjusting filter, the phase of the vertical acceleration is advanced by 49 degrees so that the phase difference with respect to the actual relative velocity becomes 180 degrees in the neighborhood of the vehicle body resonance point, thereby making the phase of the vertical acceleration, in effect, coincident with the phase of the relative velocity. In the neighborhood of the vehicle body resonance point (1 Hz), the gain of the estimated relative velocity takes a small value. In frequency regions other than the neighborhood of the vehicle body resonance point, the gain of the estimated relative velocity is increased. Consequently, the controlled variable in the neighborhood of the vehicle body resonance point increases, and the controlled variable in higher frequency regions decreases. Damping force is adjusted in correspondence to the controlled variable. Thus, it is possible to improve ride quality in the neighborhood of the vehicle body resonance point (1 Hz).
Inventors:
Toru Uchino
Nobuyuki Ichimaru
Masaaki Uchiyama
Takahide Kobayashi
Nobuyuki Ichimaru
Masaaki Uchiyama
Takahide Kobayashi
Application Number:
JP2001133447A
Publication Date:
August 17, 2011
Filing Date:
April 27, 2001
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
B60G17/015; B60G17/019; B60G17/02
Domestic Patent References:
| JP8058340A | ||||
| JP8258529A | ||||
| JP7186658A |
Attorney, Agent or Firm:
Calyx