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公开(公告)号：US11529948B2
公开(公告)日：2022-12-20
申请号：US16392005
申请日：2019-04-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Seyedeh Asal Nahidi , SeyedAlireza Kasaiezadeh Mahabadi , James H. Holbrook , John R. Yost , Hualin Tan , Xueying Kang , Bakhtiar B. Litkouhi
Abstract: A vehicle, and a method and system for operating the vehicle. The system includes a processor. The processor receives a driver input at the vehicle, determines a current lateral force on a tire of the vehicle for the driver input, determines a desired yaw rate and lateral velocity for the vehicle based on the current lateral force on the tire that operates the vehicle at a maximum yaw moment, and operates the vehicle at the desired yaw rate and lateral velocity.
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2.发明授权公开(公告)号：US11046323B2
公开(公告)日：2021-06-29
申请号：US16374160
申请日：2019-04-03
Inventor： Ehsan Hashemi , SeyedAlireza Kasaiezadeh Mahabadi , Amir Khajepour , Xueying Kang , Jin-Jae Chen , Hualin Tan , James H. Holbrook , Bakhtiar B. Litkouhi
IPC: B60W30/18 , B60W40/068 , B60W50/00
Abstract: A method for estimation of a vehicle tire force includes: receiving, by a controller of a vehicle, a measured vehicle acceleration of the vehicle; receiving, by the controller, a measured wheel speed and a measured yaw rate of the vehicle; forming, by the controller, inertia matrices based on an inertia of rotating components of the vehicle; calculating torques at corners of the vehicle using the inertia matrices; estimating tire forces of the vehicle based on the measured vehicle acceleration, the measured wheel speed, and the inertia matrices; and controlling, by the controller, the vehicle, based on the plurality of estimated longitudinal and lateral tire forces.
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公开(公告)号：US10407034B2
公开(公告)日：2019-09-10
申请号：US15614172
申请日：2017-06-05
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Seyedalireza Kasaiezadeh Mahabadi , James H. Holbrook , Hualin Tan , Ehsan Hashemi , Bakhtiar B. Litkouhi
Abstract: A combined slip based driver command interpreter for a vehicle is provided which may be communicatively coupled to a steering wheel angle sensor, an acceleration pedal position sensor and a brake pedal position sensor, the combined slip based driver command interpreter including, but not limited to a memory configured to store a non-linear combined lateral slip model and a non-linear combined longitudinal slip model, and a processor, the processor configured to determine a driver's intended vehicle lateral velocity and a driver's intended vehicle yaw rate based upon the angle of the steering wheel, the position of the acceleration pedal, the position of the brake pedal, a longitudinal velocity of the vehicle, the non-linear combined lateral slip model and the non-linear combined longitudinal slip model.
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公开(公告)号：US20170080908A1
公开(公告)日：2017-03-23
申请号：US15235902
申请日：2016-08-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chris Morgan , James H. Holbrook , Edmund F. Gaffney, III
IPC: B60T8/1755 , B60T1/16 , B60T8/171 , B62D35/00
CPC classification number: B60T8/17551 , B60T1/16 , B60T8/171 , B60T2210/12 , B60T2270/86 , B62D35/007 , B62D37/02 , Y02T10/88
Abstract: A method for controlling an active aerodynamic element in a vehicle having road wheels with tires in contact with a road surface includes receiving driver input signals and vehicle kinematics data. The driver input signals correspond to a requested aerodynamic performance operating point. Tire coefficients of friction in the longitudinal and lateral directions are provided to the controller. Desired longitudinal and lateral forces acting on the tires are determined using the input signals, kinematics data, and actual force data. Additionally, a desired total aerodynamic downforce for meeting the aerodynamic performance operating point is determined as a function of the tire forces and coefficients. A position of the aerodynamic element(s) is controlled such that the total aerodynamic downforce is achieved. A system includes the aerodynamic element(s), actuator(s), and controller. A vehicle includes the body, road wheels, active aerodynamic element(s), actuator(s), and controller.
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5.发明申请公开(公告)号：US20230079933A1
公开(公告)日：2023-03-16
申请号：US17447192
申请日：2021-09-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Naser Mehrabi , Saurabh Kapoor , Seyedeh Asal Nahidi , SeyedAlireza Kasaiezadeh Mahabadi , James H. Holbrook , Hualin Tan , Bakhtiar B. Litkouhi
IPC: B60W40/101 , B62D15/02
Abstract: Systems and methods for determining whether a vehicle is in an understeer or oversteer situation. The system includes a controller circuit coupled to an IMU and an EPS, and programmed to: calculate, for a steered first axle, an axle-based pneumatic trail for using IMU measurements and EPS signals and estimate a saturation level as a function of a distance between the axle-based pneumatic trail and zero. The system estimates, for an unsteered second axle, an axle lateral force curve with respect to a slip angle of the second axle, and a saturation level as a function of when the axle lateral force curve with respect to the slip angle transitions from positive values to negative values. The saturation level of the first axle and the second axle are integrated. The system determines that the vehicle is in an understeer or oversteer situation as a function of the integrated saturation levels.
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Patent Agency Ranking
公开(公告)号：US11491970B2
公开(公告)日：2022-11-08
申请号：US16787698
申请日：2020-02-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Seyedeh Asal Nahidi , SeyedAlireza Kasaiezadeh Mahabadi , James H. Holbrook , Hualin Tan , Bakhtiar B. Litkouhi
Abstract: A method of controlling stability of a vehicle and a stability control system for the vehicle. A driver command is determined based on driver input data. At least one output command is sent to one or more vehicle systems to control stability of the vehicle based on the driver command. A controller sends the output command based on a control hierarchy that provides an order in which the controller controls body motion of the vehicle, wheel slip of the vehicle, and standard stability of the vehicle to control stability of the vehicle. The order dictates that the controller controls the body motion of the vehicle and the wheel slip of the vehicle before the controller controls the standard stability of the vehicle. A state of one or more of the vehicle systems is controlled based on the sent output command as dictated via the control hierarchy.
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7.发明申请公开(公告)号：US20200317198A1
公开(公告)日：2020-10-08
申请号：US16374160
申请日：2019-04-03
Inventor： Ehsan Hashemi , SeyedAlireza Kasaiezadeh Mahabadi , Amir Khajepour , Xueying Kang , Jin-Jae Chen , Hualin Tan , James H. Holbrook , Bakhtiar B. Litkouhi
IPC: B60W30/18 , B60W40/068 , B60W50/00
Abstract: A method for estimation of a vehicle tire force includes: receiving, by a controller of a vehicle, a measured vehicle acceleration of the vehicle; receiving, by the controller, a measured wheel speed and a measured yaw rate of the vehicle; forming, by the controller, inertia matrices based on an inertia of rotating components of the vehicle; calculating torques at corners of the vehicle using the inertia matrices; estimating tire forces of the vehicle based on the measured vehicle acceleration, the measured wheel speed, and the inertia matrices; and controlling, by the controller, the vehicle, based on the plurality of estimated longitudinal and lateral tire forces.
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公开(公告)号：US10768074B2
公开(公告)日：2020-09-08
申请号：US16116133
申请日：2018-08-29
Applicant: GM Global Technology Operations LLC
Inventor： SeyedAlireza Kasaiezadeh Mahabadi , Seyedeh Asal Nahidi , James H. Holbrook , Jin-Jae Chen , Bakhtiar B. Litkouhi , Hualin Tan
Abstract: A method of controlling an active aerodynamic system of a vehicle includes calculating a first spring force estimated value from at least one sensed vehicle handling characteristic, and a second spring force estimated value from a nominal spring characteristic curve. When a difference between the first and second spring force estimated values is equal to or greater than a spring threshold value, a nominal spring characteristic curve is adjusted to define an adjusted spring characteristic curve, and the active aerodynamic system is controlled using the adjusted spring characteristic curve. When the difference between the first and second spring force estimated values is equal to or greater than the spring threshold value, a signal may also be engaged to provide a service recommendation.
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9.发明申请公开(公告)号：US20200072705A1
公开(公告)日：2020-03-05
申请号：US16116133
申请日：2018-08-29
Applicant: GM Global Technology Operations LLC
Inventor： SeyedAlireza Kasaiezadeh Mahabadi , Seyedeh Asal Nahidi , James H. Holbrook , Jin-Jae Chen , Bakhtiar B. Litkouhi , Hualin Tan
Abstract: A method of controlling an active aerodynamic system of a vehicle includes calculating a first spring force estimated value from at least one sensed vehicle handling characteristic, and a second spring force estimated value from a nominal spring characteristic curve. When a difference between the first and second spring force estimated values is equal to or greater than a spring threshold value, a nominal spring characteristic curve is adjusted to define an adjusted spring characteristic curve, and the active aerodynamic system is controlled using the adjusted spring characteristic curve. When the difference between the first and second spring force estimated values is equal to or greater than the spring threshold value, a signal may also be engaged to provide a service recommendation.
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公开(公告)号：US20240025393A1
公开(公告)日：2024-01-25
申请号：US17812818
申请日：2022-07-15
Applicant: GM Global Technology Operations LLC
Inventor： Naser Mehrabi , Nauman Sohani , Mustafa Hakan Turhan , Saurabh Kapoor , Sresht Gurumoorthi Annadevara , SeyedAlireza Kasaiezadeh Mahabadi , Hualin Tan , James H. Holbrook
CPC classification number: B60W30/02 , B60W30/18172 , B60W2720/403 , B60W2720/20 , B60W2510/207 , B60W2540/10
Abstract: A system comprises a computer including a processor and a memory. The memory includes instructions such that the processor is programmed to: determine an occurrence of intentional drift event, and in response to determining the occurrence of the intentional drift event, determine a front torque target and a rear torque target.
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