Gm Global Technolgoy Operations, Inc.

Hong S Bae

Kwang-Keun Shin

Mark N Howell

Yilu Zhang

Mutasim Abdurrahman Salman

Xidong Tang

Satish Rajagopalan

Jihan Ryu

A method to monitor alignment of wheels of a vehicle through analysis of a GPS signal includes monitoring the GPS signal, determining an actual trajectory of the vehicle based upon the GPS signal, monitoring a vehicle sensor indicating an expected change in vehicle heading, determining an expected trajectory of the vehicle based upon the vehicle sensor, and indicating misalignment of the wheels of the vehicle based upon a comparison of the trajectories.

Diagnosis of wheel alignment using GPS

A system and method for determining the health of a component includes retrieving measured health signatures from the component, retrieving component usage variables, estimating component health signatures using an aging model, determining an aging derivative using the aging model and calculating an aging error based on the estimated component health signatures, the aging derivative and the measured health signatures.

Method and apparatus for vehicle component health prognosis by integrating aging model, usage information and health signatures

A disc braking system of a vehicle determines the actual temperature of a brake rotor. The disc braking system compares the actual temperature of the brake rotor to a critical temperature of the brake rotor. The critical temperature of the brake rotor is a temperature above which damage and/or warping to the brake rotor may occur. The disc braking system applies a corrective measure to prevent damage to the brake rotor when the actual temperature of the brake rotor is greater than the critical temperature of the brake rotor. The corrective measure may include, but is not limited to: displaying a warning, adjusting a fraction control system of the vehicle, scheduling maintenance for the vehicle.

Method for maintaining a brake rotor

A system and method for providing component and sub-system state of health prognosis in a complex system using fault models and component aging models. The method includes determining a current state of health value for a sub-system using fault signature test results and determining current state of health values for a plurality of components in the sub-system using the fault signature test results. The method also determines current state of health values for components in the system that cannot use fault signature test results using a first probability model and the current state of health values for the plurality of components. The method determines predicted future state of health values for the components in the sub-system using component aging models and determines a predicted future state of health value for the sub-system using a second probability model and the future state of health values of the components.

Health prognosis for complex system using fault modeling

A system and method for determining whether a particular wheel on a vehicle is un-balanced during operation of the vehicle. The method includes providing wheel angle signals from the wheels of the vehicle and providing a vibration measurement signal from a response point on the vehicle, such as from an accelerometer on a steering column of the vehicle. The method also includes generating a regression vector using the wheel angle signals. The method also includes generating an estimated parameter vector using a recursive least squares algorithm, the regression vector and the vibration measurement signal. The method then calculates an imbalanced magnitude value of each wheel of the vehicle using the estimated parameter vector. The method uses a persistency of excitation test to determine whether the parameter vector has converged to a true value to determine whether the calculated imbalanced magnitude values are accurate.

Method and apparatus for real-time estimation of four wheel imbalances for chassis prognosis

Methods, systems and computer program products for alerting a vehicle operator to traffic movement. The methods include identifying a zone around a host vehicle and identifying a target vehicle in the zone. The speed and location of the target vehicle are monitored. An alert is generated in the host vehicle if the target vehicle is moving outside of the zone at a speed higher than a minimum speed and the host vehicle is stationary.

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Sterling Heights, MI, United States of America

Hong S Bae