| 摘要 |
The present invention relates to a cooperative system of a lane keeping assist system (LKAS) and a motor-driven power steering (MDPS) device and, more specifically, to a system and method for improving steering angle response characteristics of the MDPS device when controlling the LKAS. To achieve this, the cooperative system according to the present invention is characterized by including a low band filter which separates torque inputted into the LKAS into low-frequency components and high-frequency components; a pulse converter converting the torque of the separated low-frequency components into torque having a predetermined frequency and duty; a low-frequency gain controller controlling gains of the torque provided by the pulse converter; a high-frequency gain controller controlling gains of the torque of the separated high-frequency components; a first summer summing up the torque of the high-frequency components provided by the high-frequency gain controller and the boost curve output torque of the MDPS device; a band pass filter detecting a desired torque band based on the torque provided by the first summer; and a second summer summing up the band passed torque provided by the band pass filter and the gain controlled torque provided from the low-frequency gain controller. |
