Gm Global Technolgoy Operations, Inc.

Yu Cao

Bo Yu

Ian Y Hwa

John T Zuzelski

Hossein Sadjadi

Peter J Judis

Raed N Abuaita

Adam J Kloess

Milad Alekajbaf

Ehsan Jafarzadeh

Silviu A Popescu

Dezhi Li

Paola Scarassatti Sant Anna

Sara Sadat Rahimifard

Vehicles and systems and methods for health monitoring drive unit bearings in vehicles are provided. A system for health monitoring a drive unit bearing in a vehicle includes a sensor mounted to a drive unit of the vehicle and configured to provide a vibration signal; and a processor configured to: pre-process the vibration signal from the sensor to enhance a fault signature and form a frequency domain signal; and process the frequency domain signal to estimate a health stage of the drive unit bearing.

Systems and methods for monitoring drive unit bearings

Method and apparatus for wheel speed estimation include an electrical powertrain having an electric motor providing a motor speed, a wheel, and a mechanical coupling between the motor and the wheel, and an electronic control unit calculating an estimated wheel speed based on the motor speed and mechanical dynamic models of the electrical powertrain.

Traction motor based wheel speed recovery

A system and method for passively and actively monitoring and determining the location of at least one mechanical anomaly for a power steering system of a vehicle is disclosed. The system includes one or more processors and a memory coupled to the processors. The memory stores a baseline waveform and data comprising program code that, when executed by the one or more processors, causes the system to receive at least one excitation signal and at least one response signal. The power steering system creates the response signal in response to receiving the excitation signal. In response to receiving the excitation signal and the response signal, the system is caused to estimate the frequency response between the excitation signal and the response signal based on a fast Fourier transform (FFT) algorithm. The frequency response is represented by an estimated waveform.

System for passively and actively monitoring and evaluating an electric power steering system

An exemplary method for controlling a vehicle includes providing a vehicle steering system including a moveable steering column assembly and a moveable steering wheel assembly, a first actuator and a second actuator, the first and second actuators configured to move vehicle steering system from a first position to a second position, providing a plurality of sensors, the sensors configured to measure a force characteristic, providing a controller electronically connected to the sensors and the vehicle steering system, monitoring first sensor data received from the first sensor and second sensor data received from the second sensor, generating a reference model based on a desired output displacement and the first and second sensor data, calculating, a revised output displacement based on the reference model, and automatically generating a first control signal to control the first actuator and a second control signal to control the second actuator.

Methods for steering system impedance control

A steering system for an automotive vehicle is disclosed. The steering system includes a steering column assembly, a steering wheel assembly secured to the steering column assembly, the steering wheel assembly comprising a steering wheel frame, a steering wheel rim, and a hub, and an emulator enclosed within a housing, the emulator secured to the steering column assembly. The steering wheel frame and the hub are stationary and the steering wheel rim rotates relative to the steering wheel frame and the hub.

Steering wheel with fixed eccentric center hub

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Courtice, Canada

Yu Cao