Kobe University

Other

Hitachi, Ltd.

Denso Corporation

Hitachi Automotive Systems, Ltd.

Takanori Fukao

Nobuyuki Ichimaru

Takahide Kobayashi

Tatsuya Gankai

Noriaki Itagaki

Takahiro Ishikawa

A first observer gain of an actual damping force estimating observercalculates a dynamic characteristic compensating signal, and a second observer gain of an actual vehicle model state amount estimating observercalculates a vehicle model compensating signal, from an output deviation corresponding to a difference between a sprung speed (observation output) provided from a vehicleand an estimated sprung speed (estimated observation output) provided from a vehicle approximation model of the actual vehicle model state amount estimating observer. The dynamic characteristic compensating signal is input into a dynamic characteristic providing unit of the actual vehicle model state amount estimating observer, and is used for adjustment of the setting of the dynamic characteristic providing unit. Therefore, it is possible to curb time lag occurrence in a control, and thereby perform a vibration control with improved accuracy.

Vehicle state estimating apparatus, suspension control apparatus and suspension system

The present invention provides a suspension control apparatus capable of an excellent vibration control by a model thereof designed to incorporate nonlinearity and a time-lag element of a control damper. The present invention employs the backstepping method which is one of nonlinear control methods, and is designed so as to incorporate the nonlinearity of a damper. In addition, a nonlinear controlleruses a damping force Fu obtained by expressing the dynamics of a damping force characteristic variable portion [damping force Fu(v, i)] by a first-order lag system, so as to compensate the dynamics of the damper, whereby a control system is formed so as to incorporate the time-lag element of the control damper. As a result, it is possible to reduce time lag, and to practically adjust a control force according to the characteristics of the control damper.

Suspension control apparatus

A field recognition apparatus includes a first camera for imaging a forward field and a second camera for imaging a road surface. The second camera has a light axis tilted toward a downward direction for accurately tracking a characteristic point in consecutively captured images to calculate an optical flow and for accurately recognizing road structure information. In this manner, three dimensional information of obstacles in a field is accurately processed and detected.

Field recognition apparatus, method for field recognition and program for the same

Growing community of inventors

Kyoto, Japan

Takanori Fukao