Patents by Inventor Christopher D. Gadda
Christopher D. Gadda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10988142Abstract: A method for controlling a vehicle includes applying torque to a set of tires to cause the vehicle to move along a surface, reducing an amount of downward force applied to the surface by a first tire from the set of tires using an active suspension component, and actuating the first tire to control the dynamic response of the first tire relative to the surface. The method also includes determining a traction force of the first tire relative to the surface at each of multiple values for the dynamic response of the first tire relative to the surface, and determining a maximum available traction force based on the multiple values of the dynamic response and the corresponding values for the traction force. The method also includes determining a friction parameter based on the maximum available traction force, and controlling an operation of the vehicle based on the friction parameter.Type: GrantFiled: September 27, 2018Date of Patent: April 27, 2021Assignee: Apple Inc.Inventors: Prateek Mehrotra, Christopher D. Gadda
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Patent number: 10948582Abstract: Aspects of the present disclosure involve a method for determining a road vehicle velocity and slip angle. The current disclosure presents a technique for identifying a vehicle's velocity and slip angle, in the vehicle's coordinate frame. In one embodiment, two or more sensors are orthogonally located on the underside of the vehicle in order to obtain longitudinal and lateral velocity information for slip angle determination. In another embodiment, the two or more sensors can include an array of elements for beam steering and receiver beamforming. Spatial diversity is leveraged in identifying at least a slip angle and/or velocity of the vehicle. Doppler mapping is used as a means for slip angle determination and the clutter ridge of the Doppler map is embraced for identifying the slip angle.Type: GrantFiled: March 6, 2019Date of Patent: March 16, 2021Assignee: Apple Inc.Inventors: Gabriel M. Hoffmann, Christopher D. Gadda, David A. Stronks, Ahmad Al-Dahle, Gregory E. Rogers
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Patent number: 10919520Abstract: A control system for a vehicle includes a plurality of vehicle actuators that are operable to affect actual chassis-level accelerations, a vehicle intelligence unit that determines a motion plan, a vehicle motion control unit that determines a chassis-level motion request based on the motion plan, and a chassis control unit that determines actuator commands for the plurality of vehicle actuators based on the chassis-level motion request and actuator identity information that describes presently available actuators from the plurality of vehicle actuators.Type: GrantFiled: August 3, 2017Date of Patent: February 16, 2021Assignee: Apple Inc.Inventors: Christopher D. Gadda, Carlos Alberto De Magalhaes Massera Filho, David A. Stronks, Gabriel M. Hoffmann, Miroslav Baric, Nathaniel B. Honka, Stefan Solyom, Timothee J. Cazenave
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Patent number: 10407035Abstract: A control system for a vehicle includes a plurality of vehicle actuators that are operable to affect actual chassis-level accelerations, a vehicle intelligence unit that determines a motion plan, a vehicle motion control unit that determines a chassis-level motion request based on the motion plan, and a chassis control unit that determines actuator commands for the plurality of vehicle actuators based on the chassis-level motion request.Type: GrantFiled: August 3, 2017Date of Patent: September 10, 2019Assignee: Apple Inc.Inventors: Christopher D. Gadda, Carlos Alberto De Magalhaes Massera Filho, David A. Stronks, Gabriel M. Hoffmann, Miroslav Baric, Nathaniel B. Honka, Stefan Solyom, Timothee J. Cazenave
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Patent number: 10384672Abstract: A control system for a vehicle includes an internal vehicle reference model that determines reference states for the vehicle that represent an expected vehicle response, sensors that determine measured states for the vehicle, and a vehicle motion control system that determines desired states for the vehicle. A stability determining module identifies a reference deviation between the reference states and the measured states, identifies a desired deviation between the desired states and measured states, and outputs a command for reducing the reference deviation and the desired deviation. Actuators are operable to reduce the reference deviation and the desired deviation in response to the command.Type: GrantFiled: May 11, 2017Date of Patent: August 20, 2019Assignee: Apple Inc.Inventors: Diomidis Katzourakis, Huibert Mees, Christopher D. Gadda, Stefan Solyom, Johannes A. Huennekens
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Patent number: 10247816Abstract: Aspects of the present disclosure involve a method for determining a road vehicle velocity and slip angle. The current disclosure presents a technique for identifying a vehicle's velocity and slip angle, in the vehicle's coordinate frame. In one embodiment, two or more sensors are orthogonally located on the underside of the vehicle in order to obtain longitudinal and lateral velocity information for slip angle determination. In another embodiment, the two or more sensors can include an array of elements for beam steering and receiver beamforming. Spatial diversity is leveraged in identifying at least a slip angle and/or velocity of the vehicle. Doppler mapping is used as a means for slip angle determination and the clutter ridge of the Doppler map is embraced for identifying the slip angle.Type: GrantFiled: July 6, 2016Date of Patent: April 2, 2019Assignee: Apple Inc.Inventors: Gabriel M. Hoffmann, Christopher D. Gadda, David A. Stronks, Ahmad Al-Dahle, Gregory E. Rogers
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Patent number: 8629657Abstract: A management system for a battery cell pack, the management system including a controller determining an adjustable charge profile for the battery cell pack wherein the adjustable charge profile includes an operational parameter identifying a next operation drive range mode from a set of drive range modes for the battery cell pack wherein each the drive range mode includes a state of charge (SOC) window between a charge SOC and a discharge SOC, with the set of drive range modes including a first drive range mode having a first SOC window and including a second drive range mode having a second SOC window less than the first SOC window; and one or more energy transfer stages to produce the charge SOC of the next operation drive range mode in the battery cell pack.Type: GrantFiled: November 19, 2010Date of Patent: January 14, 2014Assignee: Tesla Motors, Inc.Inventors: Clay H. Kishiyama, Vineet H. Mehta, Christopher D. Gadda, Scott I. Kohn
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Publication number: 20110156641Abstract: A system and method for improving cycle lifetimes for a lithium-ion battery pack, particularly for adapting to a dynamic use profile for a user.Type: ApplicationFiled: December 31, 2009Publication date: June 30, 2011Applicant: Tesla Motors, Inc.Inventors: Clay H. Kishiyama, Vineet H. Mehta, Christopher D. Gadda
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Publication number: 20110156652Abstract: A management system for a battery cell pack, the management system including a controller determining an adjustable charge profile for the battery cell pack wherein the adjustable charge profile includes an operational parameter identifying a next operation drive range mode from a set of drive range modes for the battery cell pack wherein each the drive range mode includes a state of charge (SOC) window between a charge SOC and a discharge SOC, with the set of drive range modes including a first drive range mode having a first SOC window and including a second drive range mode having a second SOC window less than the first SOC window; and one or more energy transfer stages to produce the charge SOC of the next operation drive range mode in the battery cell pack.Type: ApplicationFiled: November 19, 2010Publication date: June 30, 2011Inventors: Clay H. Kishiyama, Vineet H. Mehta, Christopher D. Gadda, Scott I. Kohn