Patents by Inventor Shrenik P. Shah
Shrenik P. Shah 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: 10933905Abstract: Technical solutions are described for facilitating an electric power steering (EPS) system for providing a motor torque assist command. An example EPS system includes a first module configured to generate a regulation signal or a tuning signal based on a mode of operation of the EPS system. The EPS system further includes a second module configured to generate a stability signal irrespective of the mode of operation of the EPS system. The EPS system further includes a blending module configured to combine the stability signal with either the regulation signal or the tuning signal to generate an assist motor torque signal for the EPS system.Type: GrantFiled: August 5, 2019Date of Patent: March 2, 2021Assignee: Steering Solutions IP Holding CorporationInventors: Shrenik P. Shah, Chang Wang
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Publication number: 20190359249Abstract: Technical solutions are described for facilitating an electric power steering (EPS) system for providing a motor torque assist command. An example EPS system includes a first module configured to generate a regulation signal or a tuning signal based on a mode of operation of the EPS system. The EPS system further includes a second module configured to generate a stability signal irrespective of the mode of operation of the EPS system. The EPS system further includes a blending module configured to combine the stability signal with either the regulation signal or the tuning signal to generate an assist motor torque signal for the EPS system.Type: ApplicationFiled: August 5, 2019Publication date: November 28, 2019Inventors: Shrenik P. Shah, Chang Wang
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Patent number: 10435062Abstract: Technical solutions are described for facilitating an electric power steering (EPS) system for providing a motor torque assist command. An example EPS system includes a first module configured to generate a regulation signal or a tuning signal based on a mode of operation of the eps system. The EPS system further includes a second module configured to generate a stability signal irrespective of the mode of operation of the eps system. The EPS system further includes a blending module configured to combine the stability signal with either the regulation signal or the tuning signal to generate an assist motor torque signal for the eps system.Type: GrantFiled: June 29, 2017Date of Patent: October 8, 2019Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Shrenik P. Shah, Chang Wang
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Patent number: 10322745Abstract: A system for mitigation of a torque steer includes a base gain generation module that generates a base gain based on a transmission torque, a learning module that generates a learned gain based on the transmission torque and the estimated pinion torque, and a command generation module that generates a motor torque command from the learned gain, the transmission torque, and the base gain.Type: GrantFiled: February 9, 2016Date of Patent: June 18, 2019Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Price T. Lefler, Shrenik P. Shah
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Publication number: 20190002014Abstract: Technical solutions are described for facilitating an electric power steering (EPS) system for providing a motor torque assist command. An example EPS system includes a first module configured to generate a regulation signal or a tuning signal based on a mode of operation of the eps system. The EPS system further includes a second module configured to generate a stability signal irrespective of the mode of operation of the eps system. The EPS system further includes a blending module configured to combine the stability signal with either the regulation signal or the tuning signal to generate an assist motor torque signal for the eps system.Type: ApplicationFiled: June 29, 2017Publication date: January 3, 2019Inventors: Shrenik P. Shah, Chang Wang
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Patent number: 10077068Abstract: A control system for a power steering system includes a motor; a control module in communication with the motor, the control module providing a compensated velocity loop command to the motor. The control module includes a stability compensation filter module that receives a vehicle speed and a velocity loop command, the stability compensation filter applies a second order filter on the velocity loop command to generate the compensated velocity loop command used by the motor.Type: GrantFiled: November 27, 2015Date of Patent: September 18, 2018Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Michael K. Hales, Tejas M. Varunjikar, Shrenik P. Shah
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Patent number: 10071764Abstract: An embodiment of a system for evaluating a torque sensor includes an input module configured to receive torque signals from a hand wheel torque sensor in a vehicle, and a sensor evaluation module configured to perform monitoring a condition affecting the hand wheel torque sensor, and determining whether the condition indicates a desired situation in which a probability of an input torque being applied to the hand wheel is below a selected threshold. The sensor evaluation module is also configured to perform, based on detecting the desired situation, automatically analyzing the torque signals received during a time duration of the desired situation to estimate one or more torque sensor error values, and outputting at least one of a corrected torque signal and the one or more error values to a torque command generation module, the torque command generation module configured to generate a torque command to an electric motor.Type: GrantFiled: November 11, 2016Date of Patent: September 11, 2018Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Daniel Carriazo-Rabadán, Bertram Moeller, Shrenik P. Shah, Michael K. Hales
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Patent number: 10003285Abstract: A method of controlling an electric motor that generates an output current from an input voltage command that includes a sum of a first voltage command and a second voltage command is provided. The method receives the output current from the motor as a feedback. The method determines a first set of gain factors to generate the first voltage command based on the feedback such that the input voltage command causes the motor to generate the output current with reduced influence of variations of a set of operating parameters of the motor. The method determines a difference between the feedback and a desired current. The method determines a second set of gain factors to generate the second voltage command based on the difference such that the input voltage command causes the motor to generate the output current as a first, second or higher order response.Type: GrantFiled: October 1, 2014Date of Patent: June 19, 2018Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Prerit Pramod, Shrenik P. Shah, Julie A. Kleinau, Michael K. Hales
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Publication number: 20180134311Abstract: An embodiment of a system for evaluating a torque sensor includes an input module configured to receive torque signals from a hand wheel torque sensor in a vehicle, and a sensor evaluation module configured to perform monitoring a condition affecting the hand wheel torque sensor, and determining whether the condition indicates a desired situation in which a probability of an input torque being applied to the hand wheel is below a selected threshold. The sensor evaluation module is also configured to perform, based on detecting the desired situation, automatically analyzing the torque signals received during a time duration of the desired situation to estimate one or more torque sensor error values, and outputting at least one of a corrected torque signal and the one or more error values to a torque command generation module, the torque command generation module configured to generate a torque command to an electric motor.Type: ApplicationFiled: November 11, 2016Publication date: May 17, 2018Inventors: Daniel Carriazo-Rabadán, Bertram Moeller, Shrenik P. Shah, Michael K. Hales
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Patent number: 9873453Abstract: A system for detecting handwheel control comprises a driver torque estimation module that estimates a driver torque state based on a plurality of electric power steering signals; and a grip detection module that determines one of a grip level, a hands-on wheel flag, and a transition blending factor from the driver torque state, the grip level is used to control a driver assist power steering system.Type: GrantFiled: April 15, 2016Date of Patent: January 23, 2018Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Shrenik P. Shah, Chang Wang, Mariam Swetha George
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Patent number: 9845109Abstract: A system and a method of controlling a power steering system of a vehicle are provided. A control system includes a control module operable to determine a rack force of the vehicle based on at least one of a motor velocity, a driver torque and a motor torque, determine a plurality of modeled rack forces based on a roadwheel angle and a vehicle speed, compare the rack force to the plurality of modeled rack forces to generate a friction level included in a control signal, and send the control signal to the power steering system.Type: GrantFiled: March 22, 2016Date of Patent: December 19, 2017Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Mariam Swetha George, Shrenik P. Shah, Farhad Bolourchi, Tejas M. Varunjikar
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Publication number: 20170297618Abstract: A system for detecting handwheel control comprises a driver torque estimation module that estimates a driver torque state based on a plurality of electric power steering signals; and a grip detection module that determines one of a grip level, a hands-on wheel flag, and a transition blending factor from the driver torque state, the grip level is used to control a driver assist power steering system.Type: ApplicationFiled: April 15, 2016Publication date: October 19, 2017Inventors: SHRENIK P. SHAH, CHANG WANG, MARIAM SWETHA GEORGE
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Publication number: 20170029019Abstract: A control system for a power steering system includes a motor; a control module in communication with the motor, the control module providing a compensated velocity loop command to the motor. The control module includes a stability compensation filter module that receives a vehicle speed and a velocity loop command, the stability compensation filter applies a second order filter on the velocity loop command to generate the compensated velocity loop command used by the motor.Type: ApplicationFiled: November 27, 2015Publication date: February 2, 2017Inventors: Michael K. Hales, Tejas M. Varunjikar, Shrenik P. Shah
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Patent number: 9550523Abstract: A system and a method of controlling a power steering system of a vehicle are provided. A control system includes a control module operable to receive sensor data and control the power steering system. The control module is configured to determine whether the vehicle is operating in a low surface friction condition based on a handwheel angle and one of a handwheel torque and a pinion torque. The control module generates a control signal based on the determination and sends the control signal to the power steering system.Type: GrantFiled: June 22, 2015Date of Patent: January 24, 2017Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Mariam Swetha George, Shrenik P. Shah, Farhad Bolourchi
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Publication number: 20160280251Abstract: A system and a method of controlling a power steering system of a vehicle are provided. A control system includes a control module operable to determine a rack force of the vehicle based on at least one of a motor velocity, a driver torque and a motor torque, determine a plurality of modeled rack forces based on a roadwheel angle and a vehicle speed, compare the rack force to the plurality of modeled rack forces to generate a friction level included in a control signal, and send the control signal to the power steering system.Type: ApplicationFiled: March 22, 2016Publication date: September 29, 2016Inventors: Mariam Swetha George, Shrenik P. Shah, Farhad Bolourchi, Tejas M. Varunjikar
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Publication number: 20160236708Abstract: A system for mitigation of a torque steer includes a base gain generation module that generates a base gain based on a transmission torque, a learning module that generates a learned gain based on the transmission torque and the estimated pinion torque, and a command generation module that generates a motor torque command from the learned gain, the transmission torque, and the base gain.Type: ApplicationFiled: February 9, 2016Publication date: August 18, 2016Inventors: Price T. Lefler, Shrenik P. Shah
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Publication number: 20150372623Abstract: A method of controlling an electric motor that generates an output current from an input voltage command that includes a sum of a first voltage command and a second voltage command is provided. The method receives the output current from the motor as a feedback. The method determines a first set of gain factors to generate the first voltage command based on the feedback such that the input voltage command causes the motor to generate the output current with reduced influence of variations of a set of operating parameters of the motor. The method determines a difference between the feedback and a desired current. The method determines a second set of gain factors to generate the second voltage command based on the difference such that the input voltage command causes the motor to generate the output current as a first, second or higher order response.Type: ApplicationFiled: October 1, 2014Publication date: December 24, 2015Inventors: Prerit Pramod, Shrenik P. Shah, Julie A. Kleinau, Michael K. Hales
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Publication number: 20150367884Abstract: A system and a method of controlling a power steering system of a vehicle are provided. A control system includes a control module operable to receive sensor data and control the power steering system. The control module is configured to determine whether the vehicle is operating in a low surface friction condition based on a handwheel angle and one of a handwheel torque and a pinion torque. The control module generates a control signal based on the determination and sends the control signal to the power steering system.Type: ApplicationFiled: June 22, 2015Publication date: December 24, 2015Inventors: Mariam Swetha George, Shrenik P. Shah, Farhad Bolourchi