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Title:
MOTOR CONTROL METHOD AND DEVICE FOR ELECTRIC ASSIST STEERING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/135576
Kind Code:
A1
Abstract:
A method for calculating a steering assist torque, for controlling the motor of an electric assist steering system, comprises the steps of: generating a low frequency torque signal from an applied steering torque signal by using a low-pass filter; calculating a low frequency assist torque on the basis of the low frequency torque signal; generating a relatively high frequency torque signal by using the applied steering torque signal and the low frequency torque signal; generating a high frequency torque signal from the relatively high frequency torque signal by using a high-pass filter; calculating a high frequency assist torque on the basis of the high frequency torque signal; and calculating a steering assist torque by summing the low frequency assist torque and the high frequency assist torque. The high-pass filter is equipped with a plurality of high-pass filters divided according to steering angle sections, and the relatively high frequency torque signal is selectively distributed to any one among the plurality of high-pass filters according to the size of the steering angle at a corresponding time point and the high frequency torque signal is generated.

Inventors:
LEE, Jung Il (664 Nongong-ro, Nongong-eupDalseong-Gun, Daegu, 42981, KR)
PARK, Se Jung (664 Nongong-ro, Nongong-eupDalseong-Gun, Daegu, 42981, KR)
LIM, Chae Hyo (664 Nongong-ro, Nongong-eupDalseong-Gun, Daegu, 42981, KR)
Application Number:
KR2018/016956
Publication Date:
July 11, 2019
Filing Date:
December 31, 2018
Export Citation:
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Assignee:
ERAE AMS CO., LTD. (664 Nongong-ro, Nongong-eupDalseong-Gun, Daegu, 42981, KR)
International Classes:
B62D5/04; B62D6/02; B62D6/08
Foreign References:
JP4398618B22010-01-13
KR20050046726A2005-05-18
KR20170078405A2017-07-07
JP2010195097A2010-09-09
JPH11313497A1999-11-09
Attorney, Agent or Firm:
MI PATENT AND LAW FIRM (5F. 45, Teheran-ro 4-gilGangnam-Gu, Seoul, 06240, KR)
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