STEERING CONTROL DEVICE

• Main Authors: KODERA TAKASHI, KAKIMOTO YUSUKE, KUDO YOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 07.04.2022
• Subjects: LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

To provide a steering control device that can suppress target torque from deviating from a proper value.SOLUTION: A target reaction force torque generation part 72 comprises an axial force component calculation part 92 that calculates after-adjustment axial force Fir as an axial force component. The axial force component calculation part 92 includes: a before-adjustment axial force calculation part 101 that calculates before-adjustment axial force Fds corresponding to axial force acting on a rack shaft; a first axial force calculation part 102 that calculates first axial force Fd1 by adjusting the before-adjustment axial force Fds using a vehicle speed Vb; a second axial force calculation system 103 that calculates second axial force Fds2 by adjusting the before-adjustment axial force Fds without using the speed vehicle Vb; and an after-adjustment axial force calculation part 104 that calculates the after-adjustment axial force Fir by summing the first axial force Fd1 and the second axial force Fd2 at prescribed allocation ratios which are individually set. The after-adjustment axial force calculation part 104 sets the allocation ratio for the first axial force Fd1 to be smaller when a state of the vehicle speed Vb is abnormal than when the state of the vehicle speed Vb is normal.SELECTED DRAWING: Figure 3 【課題】目標トルクが適切な値から乖離することを抑制できる操舵制御装置を提供する。【解決手段】目標反力トルク生成部７２は、軸力成分として調整後軸力Ｆirを演算する軸力成分演算部９２を備える。軸力成分演算部９２は、ラック軸に作用する軸力に応じた調整前軸力Ｆdsを演算する調整前軸力演算部１０１と、車速Ｖbを用いて調整前軸力Ｆdsを調整することにより第１軸力Ｆd1を演算する第１軸力演算部１０２と、車速Ｖbを用いずに調整前軸力Ｆdsを調整することにより第２軸力Ｆd2を演算する第２軸力演算部１０３と、第１軸力Ｆd1及び第２軸力Ｆd2を個別に設定される所定配分比率で合算することにより調整後軸力Ｆirを演算する調整後軸力演算部１０４とを備える。調整後軸力演算部１０４は、車速Ｖbの状態が異常である場合には、車速Ｖbの状態が正常である場合に比べ、第１軸力Ｆd1の配分比率を小さくする。【選択図】図３