ELECTRIC POWER STEERING CONTROL SYSTEM - MITSUBISHI ELECTRIC CORP

Title:

ELECTRIC POWER STEERING CONTROL SYSTEM

Document Type and Number:

WIPO Patent Application WO/2007/119333

Kind Code:

A1

Abstract:

Intended is to solve the problem of an increase in the cost of an electric power steering control system, the oscillations of which are suppressed by estimating and feeding back the oscillation frequency components of a motor rotating speed through an observer from a steering torque signal and a current signal for driving a motor, no matter whether a phase compensator might be made of an analog circuit or a software. In order to solve this problem, there is provided the electric power steering control system, in which the phase compensator of the steering torque is made of an analog circuit and in which an anti-phase compensator is made over the software of a microcomputer, thereby to eliminate the changes in the gain and the phase by the phase compensator of the analog circuit near the oscillation frequency, so that the steering torque signal equivalent to that of no phase compensation necessary for the computation at the observer is computed from the phase-compensated steering torque signal.

Inventors:

KURISHIGE MASAHIKO (JP)
KIFUKU TAKAYUKI (JP)
SAKANISHI SEIJI (JP)
TANAKA MASAHARU (JP)
SAWADA SEIJI (JP)
SUGIYAMA AKINOBU (JP)
HAMADA HANAKO (JP)

Application Number:

PCT/JP2007/054840

Publication Date:

October 25, 2007

Filing Date:

March 12, 2007

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
KURISHIGE MASAHIKO (JP)
KIFUKU TAKAYUKI (JP)
SAKANISHI SEIJI (JP)
TANAKA MASAHARU (JP)
SAWADA SEIJI (JP)
SUGIYAMA AKINOBU (JP)
HAMADA HANAKO (JP)

International Classes:

B62D6/00; B62D5/04; B62D119/00; B62D137/00

Foreign References:

JP2000168600A	2000-06-20
JPH05106682A	1993-04-27
JP2006062390A	2006-03-09
JPH0891236A	1996-04-09
JPH05155352A	1993-06-22
JPH0891236A	1996-04-09
JP2000168600A	2000-06-20

Other References: