公开(公告)号：US20170199102A1

公开(公告)日：2017-07-13

申请号：US14991238

申请日：2016-01-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ibrahim A. Badiru ,  Nathan M. Picot

IPC: G01M17/04 ,  B62D65/00

CPC classification number: G01M17/04 ,  B62D5/0457 ,  B62D6/00 ,  B62D65/00 ,  G01M17/06

Abstract: A method of quantifying a viscous damping steering feel characteristic of a vehicle equipped with an electric power steering system includes connecting the electric power steering (EPS) system to a rotary actuator and kingpin actuators of a simulator system, communicating a triangle wave control input from a simulator controller to the rotary actuator, and receiving outputs from sensors in the simulator system by the simulator controller in response to the triangle wave control input. The simulator controller is programmed to execute logic embodying a method using the triangle wave control input provided via the rotary actuator and deconvolution of the outputs remove phase lag between the input and output signals, to generate a deconvoluted hysteresis loop for each of a plurality of steering cycles conducted during a vehicle simulation event, and to characterize a viscous damping steering feel characteristic of the EPS system.

公开(公告)号：US11827293B2

公开(公告)日：2023-11-28

申请号：US17171005

申请日：2021-02-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Wen-Chiao Lin ,  Ibrahim A. Badiru ,  Alexander M. Allan ,  Bo Yu ,  Qi Zhang ,  Christopher C. Au

IPC: B62D5/04 ,  B62D3/12

CPC classification number: B62D5/049 ,  B62D3/126 ,  B62D5/0484 ,  B62D5/0487

Abstract: A system comprises a processor and a memory storing instructions which when executed by the processor configure the processor to estimate a rack force for a steering system of a vehicle based on current driving and environmental conditions and estimate a health of an actuator of the steering system of the vehicle. The instructions configure the processor to estimate maximum achievable angle, velocity, and acceleration for the actuator of the steering system based on the estimated rack force and the estimated health of the actuator. The instructions configure the processor to provide to the steering system a path planned for the vehicle based on the estimated maximum achievable angle, velocity, and acceleration for the actuator of the steering system.

公开(公告)号：US10661829B2

公开(公告)日：2020-05-26

申请号：US16003583

申请日：2018-06-08

Applicant: GM Global Technology Operations LLC

Inventor： Ibrahim A. Badiru

IPC: B62D6/00 ,  B62D15/02

Abstract: A method for optimizing vehicle steer-by-wire characteristics, includes collecting steer-by-wire steering system data for multiple predetermined data segments. Multiple driving quality objective indices are determined for each segment. A trend line is prepared based on the multiple predetermined data segments using a first algorithm, a second algorithm and a third algorithm, each assigned to one of the driving quality objective indices. Values obtained from the first algorithm, the second algorithm and the third algorithm are superimposed to create a net desired incremental change in damping, steering ratio and base assist. A steering calibration modification command is generated in real-time using the incremental change in damping, steering ratio and base assist.

公开(公告)号：US20200001914A1

公开(公告)日：2020-01-02

申请号：US16020389

申请日：2018-06-27

Applicant: GM Global Technology Operations LLC

Inventor： Bo Yu ,  Ibrahim A. Badiru ,  Steven Aiuto ,  Gabriel de Paula Eduardo

IPC: B62D6/00 ,  B62D5/00

Abstract: A method to evaluate a quality of road feedback to a driver in a steer-by-wire system includes setting a test bench by grounding a steering system steering wheel using a physical 6th order impedance constraint; preloading the steering system with data defining a steering wheel angle and a vehicle speed; applying tie rod load signals to the steering system and recording signals representing each of a tie rod load, a steering wheel torque and a steering wheel acceleration. In parallel: applying first a fast Fourier transform algorithm to the recorded signals to calculate each of a gain, a phase and a coherence response from the tie rod load to the steering wheel torque; applying second a fast Fourier transform algorithm to the recorded signals to calculate a power spectral density of the steering wheel torque versus frequency; and applying frequency weighting functions to the gain and power spectral density functions.

公开(公告)号：US20190009813A1

公开(公告)日：2019-01-10

申请号：US15643584

申请日：2017-07-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brian N. Siskoy ,  Scott R. Kloess ,  Hossam Almasri ,  Silviu A. Popescu ,  Ibrahim A. Badiru

IPC: B62D5/00 ,  B62D5/04 ,  B60R16/023 ,  B60R16/03

CPC classification number: B62D5/003 ,  B60R16/0238 ,  B60R16/03 ,  B62D5/006 ,  B62D5/0484

Abstract: A vehicle and a steering system of a vehicle. The steering system includes a steering column emulator that generates an electrical driving signal in response to a driver input, a steering rack assembly that receives the electrical driving signal from the steering column emulator and controls steering of the vehicle as indicated by the received signal, and a backup system. The backup system provides a backup electrical driving signal to the steering rack assembly upon a failure of the steering column emulator, and the steering rack assembly steers the vehicle as indicated by the backup electrical driving signal upon the failure of the steering column emulator.

公开(公告)号：US09776657B1

公开(公告)日：2017-10-03

申请号：US15228069

申请日：2016-08-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ibrahim A. Badiru ,  John T. Zuzelski ,  Scott R. Kloess

IPC: B62D5/04 ,  B62D6/00 ,  B62D6/10 ,  G07C5/08 ,  G01M17/06

CPC classification number: B62D5/0481 ,  B62D6/006 ,  B62D6/10 ,  G01M17/06 ,  G07C5/0808 ,  G07C5/0816

Abstract: In one embodiment, a method for steering system integrity testing includes positioning the vehicle with the second traction wheel within a first constraint; applying mechanical load to the first traction wheel; receiving data corresponding to a steering system operating condition; positioning the vehicle with the first traction wheel within a second constraint; applying mechanical load to the second traction wheel; receiving data corresponding to a steering system operating condition; positioning the vehicle with the first and second traction wheels on respective first and second friction surfaces; applying mechanical load to the first and second traction wheels; receiving data corresponding to a steering system operating condition; transmitting the data to a processor; and determining, via the processor, a health status of the steering system based on the data.