Patents by Inventor David M. Sidlosky
David M. Sidlosky 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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Publication number: 20200041304Abstract: A method for producing high resolution virtual wheel speed sensor data includes simultaneously collecting wheel speed sensor (WSS) data from multiple wheel speed sensors each sensing rotation of one of multiple wheels of an automobile vehicle. A camera image is generated of a vehicle environment from at least one camera mounted in the automobile vehicle. An optical flow program is applied to discretize the camera image in pixels. Multiple distance intervals are overlayed onto the discretized camera image each representing a vehicle distance traveled defining a resolution of each of the multiple wheel speed sensors. A probability distribution function is created predicting a distance traveled for a next WSS output.Type: ApplicationFiled: July 31, 2018Publication date: February 6, 2020Inventors: Carlos E. Arreaza, Amin Abdossalami, Norman J. Weigert, Daniel S. Maitlen, David M. Sidlosky
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Patent number: 10272919Abstract: Methods and systems for determining road surface information in a vehicle. In one embodiment, the method includes: determining at least one condition assessment value based on steering data; determining a feature set to include at least one of self-aligning torque (SAT), slip angle, SAT variance, steering rate, and lateral acceleration based on the condition assessment value; processing steering data obtained during a steering maneuver and associated with the feature set using a pattern classification technique; and determining a surface type based on the processing.Type: GrantFiled: October 9, 2014Date of Patent: April 30, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, LLCInventors: Youssef A. Ghoneim, Qingrong Zhao, Qi Zhang, Bakhtiar B. Litkouhi, Yingmei Si, David M. Sidlosky, Valarie V. Boatman, Sami Ahmed
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Patent number: 9797726Abstract: A reduced-order fail-safe inertial measurement unit system. A first inertial measurement unit device includes a plurality of accelerometers measuring linear accelerations and gyroscopes measuring angular velocities. A second inertial measurement unit device includes a reduced number of accelerometers and gyroscopes relative to the first inertial measurement unit device measuring at least two linear accelerations and at least one angular velocity. A processor receives acceleration data from the first and second inertial measurement units. The processor detects faulty data measurements from the first inertial measurement unit. The processor supplements the faulty data measurements of the first inertial measurement unit with transformed data generated as a function of the measurement data from the second inertial measurement unit. The processor applies predetermined transformation solutions to transform the measurement data from the second inertial measurement unit into the transformed data.Type: GrantFiled: August 10, 2015Date of Patent: October 24, 2017Assignee: GM Global Technology Operations LLCInventors: Shih-Ken Chen, Nikolai K. Moshchuk, Bakhtiar B. Litkouhi, Jin-Jae Chen, David M. Sidlosky
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Patent number: 9645250Abstract: A method for providing redundant vehicle speed estimation. The method includes providing sensor output signals from a plurality of primary sensors and providing inertial measurement signals from an inertial measurement unit. The method also includes estimating the vehicle speed in a primary module using the primary sensor signals, and buffering the estimated vehicle speed values from the primary module for a predetermined period of time. The method further includes determining that one or more of the primary sensors or the primary module has failed, and if so, estimating the vehicle speed in a secondary module using the buffered vehicle speed values and the inertial measurement signals. The method can use GPS signal data and/or range data from static objects to improve the estimated vehicle speed in the secondary module if they are available.Type: GrantFiled: April 7, 2015Date of Patent: May 9, 2017Assignee: GM Global Technology Operations LLCInventors: Shuqing Zeng, David M. Sidlosky, David W. Doerr
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Patent number: 9623877Abstract: A system for use at a vehicle to estimate vehicle pitch angle and road grade angle, in real time and generally simultaneously. The system includes a sensor configured to measure vehicle pitch rate, a processor, and a computer-readable medium. The medium includes computer-executable instructions that, when executed by the processor, cause the processor to perform operations comprising estimating, using an observer and the vehicle pitch rate measured by the sensor, an estimated vehicle pitch rate. The operations further comprise estimating, using an observer and the measured vehicle pitch rate, the vehicle pitch angle, and estimating, based on the estimated vehicle pitch rate and the vehicle pitch angle estimated, the road grade angle.Type: GrantFiled: May 2, 2014Date of Patent: April 18, 2017Assignee: GM Global Technology Operations LLCInventors: Shih-ken Chen, Nikolai K. Moshchuk, Jin-Jae Chen, David M. Sidlosky
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Patent number: 9616900Abstract: A system, for use at a vehicle to estimate vehicle roll angle and road bank angle, in real time and generally simultaneously. The system includes a sensor configured to measure vehicle roll rate, a processor; and a computer-readable medium. The medium includes instructions that, when executed by the processor, cause the processor to perform operations comprising estimating, using an observer and the vehicle roll rate measured by the sensor, a vehicle roll rate. The operations also include estimating, using an observer and a measured vehicle roll rate, the vehicle roll angle, and estimating, based on the vehicle roll rate estimated and the vehicle roll angle estimated, the road bank angle.Type: GrantFiled: May 2, 2014Date of Patent: April 11, 2017Assignee: GM Global Technology Operations LLCInventors: Shih-ken Chen, David M. Sidlosky, Jin-Jae Chen, Nikolai K. Moshchuk
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Publication number: 20170043785Abstract: A reduced-order fail-safe inertial measurement unit system. A first inertial measurement unit device includes a plurality of accelerometers measuring linear accelerations and gyroscopes measuring angular velocities. A second inertial measurement unit device includes a reduced number of accelerometers and gyroscopes relative to the first inertial measurement unit device measuring at least two linear accelerations and at least one angular velocity. A processor receives acceleration data from the first and second inertial measurement units. The processor detects faulty data measurements from the first inertial measurement unit. The processor supplements the faulty data measurements of the first inertial measurement unit with transformed data generated as a function of the measurement data from the second inertial measurement unit. The processor applies predetermined transformation solutions to transform the measurement data from the second inertial measurement unit into the transformed data.Type: ApplicationFiled: August 10, 2015Publication date: February 16, 2017Inventors: SHIH-KEN CHEN, NIKOLAI K. MOSHCHUK, BAKHTIAR B. LITKOUHI, JIN-JAE CHEN, DAVID M. SIDLOSKY
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Publication number: 20160299234Abstract: A method for providing redundant vehicle speed estimation. The method includes providing sensor output signals from a plurality of primary sensors and providing inertial measurement signals from an inertial measurement unit. The method also includes estimating the vehicle speed in a primary module using the primary sensor signals, and buffering the estimated vehicle speed values from the primary module for a predetermined period of time. The method further includes determining that one or more of the primary sensors or the primary module has failed, and if so, estimating the vehicle speed in a secondary module using the buffered vehicle speed values and the inertial measurement signals. The method can use GPS signal data and/or range data from static objects to improve the estimated vehicle speed in the secondary module if they are available.Type: ApplicationFiled: April 7, 2015Publication date: October 13, 2016Inventors: Shuqing Zeng, David M. Sidlosky, David W. Doerr
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Publication number: 20160101782Abstract: Methods and systems for determining road surface information in a vehicle. In one embodiment, the method includes: determining at least one condition assessment value based on steering data; determining a feature set to include at least one of self-aligning torque (SAT), slip angle, SAT variance, steering rate, and lateral acceleration based on the condition assessment value; processing steering data obtained during a steering maneuver and associated with the feature set using a pattern classification technique; and determining a surface type based on the processing.Type: ApplicationFiled: October 9, 2014Publication date: April 14, 2016Inventors: YOUSSEF A. GHONEIM, QINGRONG ZHAO, QI ZHANG, BAKHTIAR B. LITKOUHI, YINGMEI SI, DAVID M. SIDLOSKY, VALARIE V. BOATMAN, SAMI AHMED
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Publication number: 20160068166Abstract: A system, for use at a vehicle to estimate vehicle roll angle and road bank angle, in real time and generally simultaneously. The system includes a sensor configured to measure vehicle roll rate, a processor; and a computer-readable medium. The medium includes instructions that, when executed by the processor, cause the processor to perform operations comprising estimating, using an observer and the vehicle roll rate measured by the sensor, a vehicle roll rate. The operations also include estimating, using an observer and a measured vehicle roll rate, the vehicle roll angle, and estimating, based on the vehicle roll rate estimated and the vehicle roll angle estimated, the road bank angle.Type: ApplicationFiled: May 2, 2014Publication date: March 10, 2016Inventors: Shih-ken Chen, David M. Sidlosky, Jin-Jae Chen, Nikolai K. Moshchuk
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Publication number: 20160068165Abstract: A system for use at a vehicle to estimate vehicle pitch angle and road grade angle, in real time and generally simultaneously. The system includes a sensor configured to measure vehicle pitch rate, a processor, and a computer-readable medium. The medium includes computer-executable instructions that, when executed by the processor, cause the processor to perform operations comprising estimating, using an observer and the vehicle pitch rate measured by the sensor, an estimated vehicle pitch rate. The operations further comprise estimating, using an observer and the measured vehicle pitch rate, the vehicle pitch angle, and estimating, based on the estimated vehicle pitch rate and the vehicle pitch angle estimated, the road grade angle.Type: ApplicationFiled: May 2, 2014Publication date: March 10, 2016Inventors: Shih-ken Chen, Nikolai K. Moshchuk, Jin-Jae Chen, David M. Sidlosky
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Patent number: 8886412Abstract: A steering system for an autonomously driven vehicle and methods of steering the vehicle are disclosed. A main controller signals a secondary steering assembly to operate in a first phase when a power steering controller is in a first mode and a second phase to steer the vehicle when the power steering controller is in a second mode. The main controller signals a friction device to actuate to a disengaged position when the power steering controller is in the first mode and the secondary steering assembly is in the first phase, and to signal the friction device to actuate to an engaged position to secure a steering wheel in an initial position when the power steering controller is in the second mode and the secondary steering assembly is in the second phase to allow the secondary steering assembly to steer the vehicle.Type: GrantFiled: March 14, 2013Date of Patent: November 11, 2014Assignee: GM Global Technology Operations LLCInventors: Kenneth L. Rosol, David M. Sidlosky, Robert W. Leschuk, Scott R. Kloess, John T. Zuzelski, Eric L. Raphael, Yat-Chung Tang, Stephen Pastor
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Publication number: 20140277893Abstract: A steering system for an autonomously driven vehicle and methods of steering the vehicle are disclosed. A main controller signals a secondary steering assembly to operate in a first phase when a power steering controller is in a first mode and a second phase to steer the vehicle when the power steering controller is in a second mode. The main controller signals a friction device to actuate to a disengaged position when the power steering controller is in the first mode and the secondary steering assembly is in the first phase, and to signal the friction device to actuate to an engaged position to secure a steering wheel in an initial position when the power steering controller is in the second mode and the secondary steering assembly is in the second phase to allow the secondary steering assembly to steer the vehicle.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Kenneth L. Rosol, David M. Sidlosky, Robert W. Leschuk, Scott R. Kloess, John T. Zuzelski, Eric L. Raphael, Yat-Chung Tang, Stephen Pastor
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Publication number: 20140214256Abstract: A steering system for an autonomously driven vehicle and methods of steering the vehicle are disclosed. A brake device is operable in a first phase to brake the vehicle when a power steering controller is in a first mode and operable in a second phase to steer the vehicle when the power steering controller is in a second mode. A main controller is in communication with a friction device to signal the friction device to actuate to a disengaged position when the power steering controller is in the first mode and the brake device is in the first phase, and signal the friction device to actuate to an engaged position to secure a steering wheel in an initial position when the power steering controller is in the second mode and the brake device is in the second phase to allow the brake device to steer the vehicle.Type: ApplicationFiled: January 25, 2013Publication date: July 31, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Kenneth L. Rosol, David M. Sidlosky, Robert W. Leschuk, Eric L. Raphael, Scott R. Kloess, Yat-Chung Tang, John T. Zuzelski
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Patent number: 8626389Abstract: The method and system described herein may be used to determine a reference yaw rate (?ref) for a vehicle chassis control system, and may do so across a wide spectrum of vehicle operating conditions. These conditions may include, for example, when the vehicle is being driven: at low and high vehicle speeds, in forward and reverse directions, with front-, rear- and all-wheel steering systems, according to subtle and aggressive driving maneuvers, and on roads with flat or banked surfaces, to cite a few of the potential scenarios. According to an exemplary embodiment, the method and system take into account certain tire dynamics, such as the relaxation length (?) of the tires, when estimating the reference yaw rate (?ref). Once an accurate reference yaw rate (?ref) is determined, the vehicle chassis control system may use this estimate to control one or more actuators that can influence the yaw rate of the vehicle.Type: GrantFiled: October 28, 2010Date of Patent: January 7, 2014Assignee: GM Global Technology Operations LLCInventor: David M. Sidlosky
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Publication number: 20120109458Abstract: The method and system described herein may be used to determine a reference yaw rate (?ref) for a vehicle chassis control system, and may do so across a wide spectrum of vehicle operating conditions. These conditions may include, for example, when the vehicle is being driven: at low and high vehicle speeds, in forward and reverse directions, with front-, rear- and all-wheel steering systems, according to subtle and aggressive driving maneuvers, and on roads with flat or banked surfaces, to cite a few of the potential scenarios. According to an exemplary embodiment, the method and system take into account certain tire dynamics, such as the relaxation length (?) of the tires, when estimating the reference yaw rate (?ref). Once an accurate reference yaw rate (?ref) is determined, the vehicle chassis control system may use this estimate to control one or more actuators that can influence the yaw rate of the vehicle.Type: ApplicationFiled: October 28, 2010Publication date: May 3, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventor: David M. Sidlosky
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Patent number: 8131424Abstract: A method for calculating a yaw gain for use in controlling a vehicle includes the steps of obtaining a steer angle of the vehicle, obtaining a vehicle speed, determining an adjustment factor for a baseline steering geometry equation, obtaining vehicle understeer gradient as a function of lateral acceleration, and calculating the yaw gain. The adjustment factor is determined based at least in part on the turn radius. The yaw gain is calculated based at least in part on the vehicle speed, the steer angle, the vehicle understeer gradient, and the adjustment factor.Type: GrantFiled: January 16, 2008Date of Patent: March 6, 2012Assignee: GM Global Technology Operations LLCInventors: David M. Sidlosky, Christopher A. Kinser
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Patent number: 8073607Abstract: An automated and algorithmic method utilizing motor vehicle steering geometry knowledge, applicable to small and large turn angles, along with knowledge of motor vehicle understeer gradient, for determining motor vehicle yaw gain by which a motor vehicle yaw gain table is populated for use by an electronic stability control system of the motor vehicle. The method may utilize either a recursive methodology of population or an open loop methodology of population.Type: GrantFiled: January 28, 2008Date of Patent: December 6, 2011Assignee: GM Global Technology Operations LLCInventors: David M. Sidlosky, Christopher A. Kinser
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Patent number: 7917270Abstract: A method for operating a vehicle electronic stability control (“ESC”) system utilizing values for a variable obtained from a primary source and a redundant source includes the steps of receiving a first value for the variable from the primary source, receiving a second value for the variable from the redundant source, generating a normalized value as a function of the first value and the second value, determining whether the primary source is operating correctly, utilizing the first value for operation of the vehicle ESC system if the primary source is operating correctly, and utilizing the second value for operation of the vehicle ESC system if the primary source is not operating correctly and the second value is not greater in absolute value than the normalized value.Type: GrantFiled: June 19, 2007Date of Patent: March 29, 2011Assignee: GM Global Technology Operations LLCInventors: Kerfegar K. Katrak, Hualin Tan, David M. Sidlosky, Theresa M. Kondel
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Patent number: 7640085Abstract: An on-board information system is provided, including a help facility, which is operable to provide information to a requester. The information comprises audio or audio-visual descriptions for operating various systems and control devices, using on-board or off-board devices. An information system is provided, comprising a requestor-initiated information inquiry device, an information storage system, and, an information communications center. The information storage system communicates information to the communications center based upon a request for information initiated by the requester to the information inquiry device. The request for information can be canceled during delivery. The system is applicable to vehicles and other systems wherein operators may have limited knowledge of functioning of all aspects of the system.Type: GrantFiled: November 10, 2005Date of Patent: December 29, 2009Assignee: GM Global Technology Operations, Inc.Inventors: William C. Lin, David M. Sidlosky, Jing Zhang