Invention Grant
- Patent Title: System and method to estimate maximum lateral acceleration and yaw rate in limit handling maneuvers in low-friction surfaces
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Application No.: US17448907Application Date: 2021-09-27
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Publication No.: US11780449B2Publication Date: 2023-10-10
- Inventor: Ehsan Asadi , Seyedeh Asal Nahidi , SeyedAlireza Kasaiezadeh Mahabadi , Hualin Tan
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Agency: Lorenz & Kopf LLP
- Main IPC: B60W40/109
- IPC: B60W40/109 ; B60W40/114 ; B60W40/068 ; B60W10/20

Abstract:
Systems and methods for vehicle motion control are provided. The method includes: calculating a correction factor using one of three different sets of operations when the vehicle is performing a limit handling maneuver, wherein the correction factor is calculated using a first set of operations when the vehicle is operating in an understeer state, calculated using a second set of operations when the vehicle is operating in an oversteer state, and calculated using a third set of operations when the vehicle is operating in a neutral steer state; adjusting a desired lateral acceleration and a desired yaw rate by applying the correction factor to account for a reduced level of friction experienced by the vehicle when traveling on a non-ideal friction surface; calculating optimal control actions based on the adjusted desired lateral acceleration and adjusted desired yaw rate; and applying the optimal control actions with vehicle actuators during vehicle operations.
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