Gm Global Technolgoy Operations, Inc.

Jarred James Versical

Bo Yu

Ian Y Hwa

Yubiao Zhang

Scott P Sherman

Alexander John Dan

Timothy J Colosky

Jonathan Howard Johnston

A vehicle system for determining a road wheel angle of a vehicle includes sensors configured to detect vehicle parameters including at least a steering rack load on a steering rack of the vehicle, and a control module in communication with the sensors. The control module is configured to calculate a kingpin torque based on the sensed steering rack load and a wheel-to-body displacement of the vehicle, determine a roll steer angle based on the wheel-to-body displacement of the vehicle, determine a road wheel angle of the vehicle based on the roll steer angle and the kingpin torque, and generate a signal indicative of the road wheel angle to control at least one vehicle control system. Other example vehicle systems and methods for determining a road wheel angle of a vehicle are also disclosed.

Vehicle systems and methods for estimating road wheel angles

In an exemplary embodiment, a test system is provided for testing a power steering system for a vehicle, the test system including a motor, one or more sensors, and a processor. The one or more sensors are configured to obtain sensor data pertaining to the motor. The processor is coupled to the one or more sensors and to the motor, and is configured to: determine, using the sensor data, a desired position of the motor for providing a desired amount of torque to the power steering system in order to reach one or more target behaviors: an inertia target, a spring target, a damper target, or a friction target for the power steering system; and provide instructions for the motor to move to the desired position for providing torque to the power steering system.

Vehicle power steering test system control

A module test machine includes a frame, a fixture, at most two actuators coupled to the fixture, and a controller. The frame is couplable to a first end of a strut module. The fixture is couplable to a second end of the strut module. The fixture includes a plurality of arms with a plurality of adjustable lengths. The at most two actuators are coupled to two of the plurality of arms and configured to impart a plurality of loads along six axes of force at the second end of the strut module. The controller is configured to control the at most two actuators in response to at most two actuator vectors. The plurality of adjustable lengths and the at most two actuator vectors are configured to replicate road load data at the second end of the strut module while under test.

Strut module test machine

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Commerce Township, MI, United States of America

Jarred James Versical