公开(公告)号：US11117614B2

公开(公告)日：2021-09-14

申请号：US15717149

申请日：2017-09-27

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Qi Wang ,  Tejas M. Varunjikar ,  Anthony J. Champagne ,  Michael K. Hales

IPC: B62D6/00 ,  B62D5/04

Abstract: A method for scaling a stability signal in a steering system is provided and includes computing, by a torque boost module, an assist torque command to cause a motor of the steering system to generate an assist torque. Further, the method includes computing, by a stability compensation module, a stabilized torque command based on an input signal, the stabilized torque command modifying the assist torque command. Further, the method includes computing, by a stability monitoring module, a stability scaling factor to adjust the stabilized torque command based on a duration and severity of an instability detected in the input signal.

公开(公告)号：US20210016826A1

公开(公告)日：2021-01-21

申请号：US16514396

申请日：2019-07-17

Applicant: Steering Solutions IP Holding Corporation

Inventor： Apurv Naman ,  Tejas M. Varunjikar ,  Bhuvanesh Sainath ,  Rangarajan Ramanujam ,  Prerit Pramod

IPC: B62D6/00 ,  B62D5/00 ,  B62D1/04

Abstract: Disclosed is a steer by wire system that includes a controller operable to operate a roadwheel actuator such that a position command to the roadwheel actuator based on a handwheel orientation is a magnitude corresponding to a handwheel orientation offset value in an opposite direction to reduce a difference between the handwheel orientation offset value and a predetermined handwheel zero value.

公开(公告)号：US20200346642A1

公开(公告)日：2020-11-05

申请号：US16400800

申请日：2019-05-01

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Tejas M. Varunjikar ,  Jian Sheng

IPC: B60W30/095 ,  B60W40/09 ,  B60W50/14 ,  G08G1/16

Abstract: A steering system includes a motor, and a processor configured to perform a method. The method includes computing, by a processor, a predicted steering angle at a future time step. The method further includes determining, by the processor, a predicted vehicle-position at the future time step based on the predicted steering angle. The method further includes detecting, by the processor, a proximity to an object at the future time step based on predicted vehicle-position. The method further includes generating, by the processor, an intervention signal in response to the proximity being below a predetermined threshold.

公开(公告)号：US20200331520A1

公开(公告)日：2020-10-22

申请号：US16389222

申请日：2019-04-19

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Tejas M. Varunjikar ,  Anthony J. Champagne ,  Michael S. Wyciechowski ,  Rangarajan Ramanujam

IPC: B62D5/04 ,  G07C5/08 ,  B60W40/103 ,  B60W50/00 ,  B62D6/00

Abstract: Technical solutions described herein include a method of controlling an electric power steering system includes determining that one or more hand wheel torque sensors of electric power steering system are not operational and in response generating an assist torque command by estimating a front slip angle based on a motor angle of a motor of the electric power steering system and a vehicle speed. The method also includes converting the front slip angle to a rack force. The method also includes determining an amount of assist torque based on the rack force and controlling the electric power steering system using the generated assist torque command.

公开(公告)号：US10604175B2

公开(公告)日：2020-03-31

申请号：US15717204

申请日：2017-09-27

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Keyur R. Patel ,  Anthony J. Champagne ,  Tejas M. Varunjikar

IPC: B62D5/04 ,  B62D15/02 ,  B62D6/00 ,  B62D6/10

Abstract: Technical solutions are described for providing failsafe assist torque in steering systems. An example method includes determining, by a first controller, a first assist torque signal using a first set of torque sensor signals from a first sensor and a second set of torque sensor signals from a second sensor, the first sensor corresponding to the first controller, and the second sensor corresponding to a second controller. The method further includes determining, by the second controller, a second assist torque signal using the first and second sets of torque sensor signals. Further the method includes generating, by a motor, an assist torque using the first and second assist torque signals, and in response to the first controller receiving a diagnostic signal indicating a failure of the first torque sensor, determining by the first controller, the first assist torque signal using only the second set of torque sensor signals.

公开(公告)号：US10569801B2

公开(公告)日：2020-02-25

申请号：US15288265

申请日：2016-10-07

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Tejas M. Varunjikar ,  Anthony J. Champagne

IPC: B62D5/04

Abstract: A payload estimation system and a method for estimating payload estimation using electric power steering (EPS) signals are provided. In certain embodiments, the aspects of the invention may include: receiving, by a payload detection module, multiple EPS signals to generate an additional axle load factor, determining, by a blend factor table, a load blend factor according to the additional axle load factor, generating, by a first multiplier, a blended nominal base assist signal by combining the load blend factor and a handwheel torque signal processed by a nominal base assist module, generating, by a second multiplier, a blended highload base assist signal by combining the load blend factor and the handwheel torque signal processed by a highload base assist module, and combining, by a merge module, the blended nominal base assist and the blended highload base assist to generate a motor torque command for the EPS system.

公开(公告)号：US10562561B2

公开(公告)日：2020-02-18

申请号：US15496481

申请日：2017-04-25

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Qi Wang ,  Xingye Zhang ,  Tejas M. Varunjikar ,  Anthony J. Champagne

IPC: B62D5/04 ,  B60W50/00 ,  B62D6/00

Abstract: An embodiment of a method of controlling one or more components of a vehicle includes receiving a reference steering command and one or more measurement signals related to a steering system of a vehicle, and estimating, by a processing device, a state of the steering system based on the one or more measurement signals, the steering system including at least a handwheel and a steering motor. The method also includes determining a maximum state achievable by the steering system at one or more times subsequent to receiving the one or more measurement signals, and controlling, by a control module, the steering system based on the steering reference command and the maximum state.

公开(公告)号：US10399597B2

公开(公告)日：2019-09-03

申请号：US15717182

申请日：2017-09-27

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Tejas M. Varunjikar ,  Anthony J. Champagne ,  Qi Wang

IPC: B62D5/04 ,  B62D6/10 ,  B62D15/02 ,  B62D6/00

Abstract: Technical solutions are described for a payload detection module that detects payload using one or more steering system control signals and generates an axle load factor. An example payload detection module includes a rack torque module to determine a rack torque, a reference model module to determine a reference rack torque for the steering system based on a load scale factor, and a load factor calculation module to compute the axle load factor based on a difference between the rack torque and the reference rack torque. Further, a blend factor module determines a load blend factor according to the axle load factor. Further yet, a signal combiner combines a blended nominal base assist and a blended highload base assist according to the load blend factor, the combination modifying a motor torque command, the motor torque command being sent to a motor to generate assist torque.

公开(公告)号：US20190256126A1

公开(公告)日：2019-08-22

申请号：US16276359

申请日：2019-02-14

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Mariam Swetha George ,  Tejas M. Varunjikar

IPC: B62D5/04 ,  G01M17/02

Abstract: According to one or more embodiments a control system for a steering system, includes a control module that estimates a tire load by performing a method that includes receiving, as an input torque, motor-torque that is generated by a motor of the steering system. The method further includes computing an efficiency factor for a gear of the steering system based on the input torque and a motor velocity. The method further includes adjusting the input torque by scaling the input torque with the efficiency factor. The method further includes estimating the tire load using the adjusted input torque as an input to a state observer for the steering system.

公开(公告)号：US20180290650A1

公开(公告)日：2018-10-11

申请号：US15977852

申请日：2018-05-11

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Zaki Ryne ,  Jian Sheng ,  Tejas M. Varunjikar ,  Farhad Bolourchi

IPC: B60W30/09 ,  B60W30/095 ,  B60W30/18

Abstract: A vehicle safety system includes a controller in communication with at least one of an imaging system and a ranging system. At least one of the imaging system and the ranging system being arranged to monitor a distance and a speed of a forward vehicle and at least one of an incoming vehicle and a vehicle relative to a host vehicle. The controller is programmed to output for display a time left to pass the forward vehicle based on the distance and the speed of the forward vehicle and the incoming vehicle, responsive to indicia of an impending host vehicle maneuver.