Patents by Inventor David M. Bevly
David M. Bevly 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: 20230343221Abstract: Technologies for platooned include a leader vehicle and one or more follower vehicles each including a computing device. The leader vehicle computing device controls velocity of the leader vehicle within a predetermined route based on a grade profile of the predetermined route. The leader vehicle may perform nonlinear model predictive control using a cost function based on predicted velocity error and predicted fuel consumption. The follower vehicle computing device controls velocity of the follower vehicle within the predetermined route based on headway distance to the leader vehicle and the grade profile. The follower vehicle may perform nonlinear model predictive control using a cost function based on predicted headway error, predicted headway rate of change, and predicted fuel consumption. Other embodiments are described and claimed.Type: ApplicationFiled: April 21, 2023Publication date: October 26, 2023Inventors: Jacob Ward, Evan Stegner, Mark A. Hoffman, David M. Bevly
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Patent number: 11719830Abstract: A navigation system for a mobile object generates navigation data for the mobile object based on satellite navigation signals received from a plurality of satellites and base data received from a stationary base station. The navigation data includes code phase estimates and carrier phase estimates for the plurality of satellites. The system computes position, velocity and time estimates for the mobile object in accordance with the code phase estimates and carrier phase estimates, and performs a navigation function for the mobile object in accordance with the position, velocity and time estimates. The system generates code phase estimates by performing a Vector Delay Locked Loop (VDLL) computation process that drives a code NCO for each channel of a plurality of channels, and generates carrier phase estimates for the plurality of satellites by performing a RTK Vector Phase Locked Loop computation process that drives a carrier NCO for each channel.Type: GrantFiled: April 5, 2021Date of Patent: August 8, 2023Assignees: Deere & Company, Auburn University c/o Office of Innovation Advancement and CommercializationInventors: Scott M. Martin, David M. Bevly, Richard G. Keegan, Stephen F. Rounds
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Publication number: 20210311206Abstract: A navigation system for a mobile object generates navigation data for the mobile object based on satellite navigation signals received from a plurality of satellites and base data received from a stationary base station. The navigation data includes code phase estimates and carrier phase estimates for the plurality of satellites. The system computes position, velocity and time estimates for the mobile object in accordance with the code phase estimates and carrier phase estimates, and performs a navigation function for the mobile object in accordance with the position, velocity and time estimates. The system generates code phase estimates by performing a Vector Delay Locked Loop (VDLL) computation process that drives a code NCO for each channel of a plurality of channels, and generates carrier phase estimates for the plurality of satellites by performing a RTK Vector Phase Locked Loop computation process that drives a carrier NCO for each channel.Type: ApplicationFiled: April 5, 2021Publication date: October 7, 2021Inventors: Scott M. Martin, David M. Bevly, Richard G. Keegan, Stephen F. Rounds
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Patent number: 10969496Abstract: A system for navigating a mobile object generates satellite navigation data for the mobile object based on satellite navigation signals received from a plurality of satellites and base data received from a stationary base station. The satellite navigation data for the mobile object includes code phase estimates and carrier phase estimates for the plurality of satellites. The system computes position, velocity and time estimates for the mobile object in accordance with the code phase estimates and carrier phase estimates, and performs a navigation function for the mobile object in accordance with the computed position, velocity and time estimates for the mobile object. The system generates the code phase estimates by performing a Vector Delay Locked Loop (VDLL) computation process, and generates carrier phase estimates for the plurality of satellites including by performing a Real-Time-Kinematics Vector Phase Locked Loop (RTK-VPLL) computation process.Type: GrantFiled: October 11, 2018Date of Patent: April 6, 2021Assignees: DEERE & COMPANY, AUBURN UNIVERSITYInventors: Scott M. Martin, David M. Bevly, Richard G. Keegan, Stephen F. Rounds
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Publication number: 20190120973Abstract: A system for navigating a mobile object generates satellite navigation data for the mobile object based on satellite navigation signals received from a plurality of satellites and base data received from a stationary base station. The satellite navigation data for the mobile object includes code phase estimates and carrier phase estimates for the plurality of satellites. The system computes position, velocity and time estimates for the mobile object in accordance with the code phase estimates and carrier phase estimates, and performs a navigation function for the mobile object in accordance with the computed position, velocity and time estimates for the mobile object. The system generates the code phase estimates by performing a Vector Delay Locked Loop (VDLL) computation process, and generates carrier phase estimates for the plurality of satellites including by performing a Real-Time-Kinematics Vector Phase Locked Loop (RTK-VPLL) computation process.Type: ApplicationFiled: October 11, 2018Publication date: April 25, 2019Inventors: Scott M. Martin, David M. Bevly, Richard G. Keegan, Stephen F. Rounds
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Patent number: 9403415Abstract: A system and method for sensing vehicle global pitch angle and rate that uses global velocities measured from a single antenna global positioning system (GPS) receiver together with sensor fusion algorithms involving sensor signals and other computed signals. This constructed, or computed, vehicle body's pitch angle may replace the role of a pitch rate sensor in an integrated stability control system. Namely, it achieves enhanced vehicle state estimation without the need for a pitch rate sensor.Type: GrantFiled: September 23, 2010Date of Patent: August 2, 2016Assignee: Ford Global TechnologiesInventors: Jianbo Lu, Dimitar Petrov Filev, Kwaku O. Prakah-Asante, David M. Bevly, Jonathan Ryan
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Publication number: 20110087398Abstract: A system and method for sensing vehicle global pitch angle and rate that uses global velocities measured from a single antenna global positioning system (GPS) receiver together with sensor fusion algorithms involving sensor signals and other computed signals. This constructed, or computed, vehicle body's pitch angle may replace the role of a pitch rate sensor in an integrated stability control system. Namely, it achieves enhanced vehicle state estimation without the need for a pitch rate sensor.Type: ApplicationFiled: September 23, 2010Publication date: April 14, 2011Inventors: Jianbo Lu, Dimitar Petrov Filev, Kwaku O. Prakah-Asante, David M. Bevly, Jonathan Ryan
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Patent number: 6681180Abstract: A method for determining a sideslip angle of a terrestrial vehicle that moves on wheels by using a global positioning system (GPS) receiver. The GPS receiver is mounted in the vehicle and measures the horizontal velocity of the vehicle as well as its attitude. The sideslip angle of the vehicle at the GPS receiver is obtained from these measurements. The body sideslip angle and tire sideslip angles are derived by translating the sideslip angle at the GPS receiver to the center of gravity and to the wheels. Alternatively, an on-board gyroscope is provided for measuring vehicle attitude while the horizontal velocity is obtained from the GPS receiver. The method is extended to derive wheel slip and tire cornering stiffness. The vehicle states derived by the method can be used in a stability control system for stabilizing the motion of the vehicle.Type: GrantFiled: January 29, 2002Date of Patent: January 20, 2004Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: David M. Bevly, Joseph C. Gerdes
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Publication number: 20020198655Abstract: A method for determining a sideslip angle of a terrestrial vehicle that moves on wheels by using a global positioning system (GPS) receiver. The GPS receiver is mounted in the vehicle and measures the horizontal velocity of the vehicle as well as its attitude. The sideslip angle of the vehicle at the GPS receiver is obtained from these measurements. The body sideslip angle and tire sideslip angles are derived by translating the sideslip angle at the GPS receiver to the center of gravity and to the wheels. Alternatively, an on-board gyroscope is provided for measuring vehicle attitude while the horizontal velocity is obtained from the GPS receiver. The method is extended to derive wheel slip and tire cornering stiffness. The vehicle states derived by the method can be used in a stability control system for stabilizing the motion of the vehicle.Type: ApplicationFiled: January 29, 2002Publication date: December 26, 2002Inventors: David M. Bevly, Joseph C. Gerdes