公开(公告)号：US10363958B2

公开(公告)日：2019-07-30

申请号：US15656075

申请日：2017-07-21

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Jeffrey M. Otto ,  Rangarajan Ramanujam ,  Bhuvanesh Sainath

IPC: B62D15/02 ,  B62D5/04 ,  B62D6/08 ,  G05D1/02 ,  B62D1/28 ,  B62D6/00

Abstract: Technical solutions are described for facilitating an electric power steering (EPS) system to determine an operating mode of a vehicle that is equipped with the EPS, where the operating mode is indicative of a level of autonomous driving being used by the vehicle. The technical solutions further facilitate detecting a change in the operating mode of the vehicle, and facilitating a transition in computing an assist signal for the EPS system during the transition between the operating modes.

公开(公告)号：US20250074507A1

公开(公告)日：2025-03-06

申请号：US18953780

申请日：2024-11-20

Applicant: Steering Solutions IP Holding Corporation

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

IPC: B62D6/00 ,  B62D1/04 ,  B62D5/00

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：US11834108B2

公开(公告)日：2023-12-05

申请号：US17107934

申请日：2020-11-30

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Rangarajan Ramanujam ,  Mariam S. George ,  Anthony J. Champagne

IPC: B62D6/00 ,  B60W40/068 ,  B62D5/04

CPC classification number: B62D5/0463

Abstract: A method for generating torque assist includes determining a model yaw rate value based on a vehicle speed, a steering angle, and a road-friction coefficient value and determining a differential yaw rate value using a difference between the model yaw rate value and a vehicle yaw rate value. The method also includes determining an updated road-friction coefficient value using at least the differential yaw rate value and generating a torque assist value based on the updated road-friction coefficient value and a model rack force value.

公开(公告)号：US20210019121A1

公开(公告)日：2021-01-21

申请号：US16932662

申请日：2020-07-17

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Anthony Champagne ,  Rangarajan Ramanujam ,  Michael Story ,  Owen K. Tosh

IPC: G06F8/20 ,  G06F11/36 ,  G06F8/41 ,  G06F8/60

Abstract: A method includes receiving a first input indicating at least a selected controller type and generating, based on the first input, a model that represents a controller corresponding to the selected controller type. The method also includes receiving a second input indicating at least one functional aspect of the selected controller type, updating, based on the second input, the model to represent the at least one functional aspect of the selected controller type, and compiling, using the model, a binary file that represents, at least, the at least one functional aspect of the selected controller type. The method also includes uploading the binary file to a controller corresponding to the selected controller type.

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：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：US12275466B2

公开(公告)日：2025-04-15

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 ,  B60W40/103 ,  B60W50/00 ,  B62D6/00 ,  G07C5/08

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：US12162548B2

公开(公告)日：2024-12-10

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 ,  B62D1/04 ,  B62D5/00

Abstract: A steer by wire system 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：US11511796B2

公开(公告)日：2022-11-29

申请号：US16287250

申请日：2019-02-27

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Apurv Naman ,  Rangarajan Ramanujam ,  Anthony J. Champagne

IPC: B62D5/04

Abstract: A method for damping dependent scaling for reducing wheel imbalance in a steering system includes determining roadwheel speed energy using a roadwheel speed signal and determining that the roadwheel speed energy is greater than a predetermined energy threshold, and in response: adjusting the roadwheel speed signal; and computing a wheel imbalance reduction command using the adjusted roadwheel speed signal. The method also includes determining that the roadwheel speed energy is not greater than the predetermined energy threshold, and in response computing the wheel imbalance reduction command using the roadwheel speed signal. The method also includes computing a motor torque command using the wheel imbalance reduction command, the motor torque command used to generate a corresponding amount of torque at a handwheel.

公开(公告)号：US10960921B2

公开(公告)日：2021-03-30

申请号：US15994209

申请日：2018-05-31

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Jeffrey M Otto ,  Rangarajan Ramanujam ,  Bhuvanesh Sainath

IPC: B62D5/04 ,  G07C5/08 ,  F16H25/22

Abstract: Technical solutions are described for lash detection diagnostic in a steering system. An example method includes sending, by a controller, an excitation motor command to a motor control system. The method further includes measuring, by the controller, a sensor signal generated in response to the excitation motor command. The method further includes determining, by the controller, a decay rate of a change in magnitude of the signal at a plurality of frequencies. The method further includes diagnosing, by the controller, that the steering system has a lash condition based on the decay rate exceeding a predetermined threshold.