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公开(公告)号：US20200088596A1
公开(公告)日：2020-03-19
申请号：US16179423
申请日：2018-11-02
发明人： Sang Woo Hwang , Young Dae Park , Byung Rim Lee , Min Jun Kim , Se Hyun Chang , Hyeon Seok Cho
摘要： The present disclosure relates to a technology of estimating rack force using force that is transmitted from a steering motor of a Steer-By-Wire (SBW) system to a rack bar. The present disclosure provides a method for estimating rack force of an SBW system, the method calculating restoring force that is applied to a reducer on the basis of the difference between position values of the rack bar that are obtained at the front end and the rear end of the reducer when the position of the rack bar is changed by operation of a steering motor; and calculating rack force by reflecting the restoring force to a motion equation including inertia force of the SBW system.
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公开(公告)号：US10549771B2
公开(公告)日：2020-02-04
申请号：US15808123
申请日：2017-11-09
发明人： Sang Woo Hwang , Hyeon Seok Cho , Byung Rim Lee , Young Dae Park , Min Jun Kim
摘要： A steering apparatus for a steer-by-were system includes a driving member rotating in conjunction with a steering wheel and having a first stopper protruding from the driving member; a change gear receiving rotational force from the driving member, changing a rotational speed, and outputting a changed rotational speed; and a driven member receiving the rotational force output from the change gear, rotating at a rotational speed different from that of the driving member, and having a second stopper, which protrudes from the driven member, disposed within a rotation radius of the first stopper. The second stopper comes into contact with the first stopper at a predetermined steering angle during rotation of the driving member.
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公开(公告)号：US10464596B2
公开(公告)日：2019-11-05
申请号：US15811343
申请日：2017-11-13
发明人： Sang Woo Hwang , Hyeon Seok Cho , Byung Rim Lee , Young Dae Park , Min Jun Kim
摘要： A steering system for a vehicle may include first and second steering motors providing torque; a rack bar to which torques of the first and second steering motor are simultaneously applied, and configured to change steering angles of wheels by being displaced by the rotation of the first and second steering motors; first and second motor position detectors detecting rotation angles of the first and second steering motors, respectively; and a controller deriving an absolute position of the rack bar based on a difference between the rotation angles of the first and second steering motors detected by the first and second motor position detectors, wherein an amount of displacement of the rack bar according to an amount of rotation of the first steering motor is different from an amount of displacement of the rack bar according to an amount of rotation of the second steering motor.
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公开(公告)号：US10962429B2
公开(公告)日：2021-03-30
申请号：US16179423
申请日：2018-11-02
发明人： Sang Woo Hwang , Young Dae Park , Byung Rim Lee , Min Jun Kim , Se Hyun Chang , Hyeon Seok Cho
摘要： The present disclosure relates to a technology of estimating rack force using force that is transmitted from a steering motor of a Steer-By-Wire (SBW) system to a rack bar. The present disclosure provides a method for estimating rack force of an SBW system, the method calculating restoring force that is applied to a reducer on the basis of the difference between position values of the rack bar that are obtained at the front end and the rear end of the reducer when the position of the rack bar is changed by operation of a steering motor; and calculating rack force by reflecting the restoring force to a motion equation including inertia force of the SBW system.
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公开(公告)号：US20180141585A1
公开(公告)日：2018-05-24
申请号：US15632531
申请日：2017-06-26
发明人： Min Jun Kim , Young Dae Park , Byung Rim Lee , Sang Woo Hwang , Se Hyun Chang , Hyeon Seok Cho
CPC分类号： B62D6/08 , B62D5/001 , B62D5/006 , B62D5/043 , B62D5/0463 , B62D5/0466 , B62D5/049 , B62D5/06
摘要： A steering apparatus for a steer by wire system includes a first motor and a second motor configured to provide a torque. A first planetary gear set is configured to receive the torque from the first motor and to generate a reaction torque required for steering. A second planetary gear set is configured to receive the torque from the steering wheel and the second motor, and to variably output a gear ratio for an input by the steering wheel depending on a rotation of the second motor. A stopping mechanism is configured to limit a maximum rotation angle of the steering wheel.
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公开(公告)号：US11448943B2
公开(公告)日：2022-09-20
申请号：US16920942
申请日：2020-07-06
发明人： Sang Woo Hwang , Young Dae Park , Byung Rim Lee , Min Jun Kim , Se Hyun Chang , Hyeon Seok Cho
摘要： An apparatus for stabilizing a camera of an autonomous vehicle includes: a sensor that detects vibration generated and applied to the camera due to a state of a road surface when the autonomous vehicle is traveling; a first actuator that attenuates roll vibration applied to the camera; a second actuator that attenuates pitch vibration applied to the camera; and a controller that controls the first actuator and the second actuator to attenuate the vibration detected by the sensor.
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公开(公告)号：US11364949B2
公开(公告)日：2022-06-21
申请号：US16255565
申请日：2019-01-23
发明人： Sang Woo Hwang , Young Dae Park , Byung Rim Lee , Min Jun Kim , Se Hyun Chang , Hyeon Seok Cho
摘要： A steering-angle-limiting device of a steer-by-wire system selectively restricts turning of a steering wheel in a forward direction or in a reverse direction and permits turning of the steering wheel in order to inhibit locking of the steering wheel when the steering-angle-limiting device operates abnormally. Rotation of a stopping gear, which is coupled to a steering shaft, is selectively restricted depending on a change in a rotation angle of a cam, whereby the direction in which the steering wheel turns is selectively limited. In addition, when a stopper operates abnormally, the stopper is moved to a position apart from an end of the radius of rotation of the stopping gear, thereby enabling turning of the steering wheel.
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公开(公告)号：US11161541B2
公开(公告)日：2021-11-02
申请号：US16154303
申请日：2018-10-08
发明人： Sang Woo Hwang , Young Dae Park , Byung Rim Lee , Min Jun Kim , Se Hyun Chang , Hyeon Seok Cho
摘要： Disclosed herein is a device for selectively limiting both rotational directions of a steering wheel, and provided is a steering angle limiting device of a steer-by-wire (SBW) system including a stopping gear configured to be rotated together with a steering shaft; a cam configured to receive a rotational force of an actuator and to be eccentrically rotated; and a stopper configured to be rotated in response to rotational operation of the cam and selectively engaged with gear teeth of the stopping gear, thereby restricting selectively forward and reverse directional rotations of the stopping gear.
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公开(公告)号：US10392050B2
公开(公告)日：2019-08-27
申请号：US15632531
申请日：2017-06-26
发明人： Min Jun Kim , Young Dae Park , Byung Rim Lee , Sang Woo Hwang , Se Hyun Chang , Hyeon Seok Cho
摘要： A steering apparatus for a steer by wire system includes a first motor and a second motor configured to provide a torque. A first planetary gear set is configured to receive the torque from the first motor and to generate a reaction torque required for steering. A second planetary gear set is configured to receive the torque from the steering wheel and the second motor, and to variably output a gear ratio for an input by the steering wheel depending on a rotation of the second motor. A stopping mechanism is configured to limit a maximum rotation angle of the steering wheel.
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公开(公告)号：US11884343B2
公开(公告)日：2024-01-30
申请号：US17028529
申请日：2020-09-22
发明人： Sang Woo Hwang , Young Dae Park , Byung Rim Lee , Min Jun Kim , Se Hyun Chang , Hyeon Seok Cho
CPC分类号： B62D6/008 , B62D5/006 , B62D5/0421 , B62D15/0215
摘要： A steering feel assisting apparatus of a steer-by-wire (SBW) system, may include a disk configured to rotate together with a steering shaft; a cam engaged to an actuator and configured to receive a rotational force of the actuator to be eccentrically rotated; and a brake arm configured to selectively friction-contact with an external peripheral surface of the disk to provide a predetermined frictional force in a forward rotation direction of the disk as the brake arm rotates in conjunction with rotation of the cam.
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