Patents by Inventor Amir Khajepour

Amir Khajepour 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).

  • Publication number: 20170297584
    Abstract: A method of reconstructing a detected faulty signal. A pitch sensor fault is detected by a processor. A signal of the detected faulty pitch sensor is reconstructed using indirect sensor data. The reconstructed signal is output to a controller to maintain stability.
    Type: Application
    Filed: April 13, 2016
    Publication date: October 19, 2017
    Inventors: SHIH-KEN CHEN, BAKHTIAR B. LITKOUHI, AMIR KHAJEPOUR, REZA ZARRINGHALAM, WILLIAM MELEK
  • Publication number: 20170267232
    Abstract: Methods and systems are provided for controlling components of a vehicle. In one embodiment, a method includes: generating a model of vehicle dynamics based on vehicle corner information; determining a control output based on the model of vehicle dynamics; and selectively controlling at least one component associated with at least one of an active safety system and a chassis system of the vehicle based on the control output.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 21, 2017
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: AMIR KHAJEPOUR, SEYED ALIREZA KASAIEZADEH MAHABADI, SHIH-KEN CHEN, BAKHTIAR B. LITKOUHI
  • Publication number: 20170267280
    Abstract: Methods and systems are provided for controlling a component of a vehicle. In one embodiment, a method includes: receiving sensor data sensed from the vehicle; processing the sensor data to determine an ideal state of the vehicle; processing the sensor data and the ideal state of the vehicle to determine a feasible state of the vehicle; and selectively controlling at least one component associated with at least one of an active safety system and a chassis system of the vehicle based on the at least one feasible state.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 21, 2017
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: SEYED ALIREZA KASAIEZADEH MAHABADI, SHIH-KEN CHEN, AMIR KHAJEPOUR, BAKHTIAR B. LITKOUHI
  • Publication number: 20170131357
    Abstract: A system for monitoring characteristics of an energy storage device including the energy storage device, an optical fiber cable having a first end and a second end, the optical fiber cable embedded within the energy storage device, and a sensor interrogation system, the sensor interrogation system connected to at least one of the first end or second end of the optical fiber cable.
    Type: Application
    Filed: November 9, 2015
    Publication date: May 11, 2017
    Inventors: Patricia NIEVA, Amir KHAJEPOUR
  • Publication number: 20170102689
    Abstract: The disclosure is directed at a method and apparatus for integrated real-time monitoring and control of microstructure and/or geometry in thermal material processing (TMP) technologies. The method includes obtaining real-time thermal dynamic variables, such as, but not limited to the cooling rate, peak temperature and heating rate, and geometry of the thermal material process. These real-time thermal variables are then analyzed along with a thermal model to determine a microstructure/geometry model. This microstructure/geometry model can then be used to provide the real-time monitoring and control of a finished state for the material being processed by the thermal material processing procedure.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 13, 2017
    Inventors: Amir KHAJEPOUR, Mohammad Hossein FARSHIDIANFAR, Adrian GERLICH
  • Patent number: 9194264
    Abstract: The disclosure is directed at a valvetrain actuation (VA) system for an engine comprising at least two hydraulic rotary valves connected to an engine crankshaft, at least one hydraulic actuator driven by the at least two hydraulic rotary valves, and a high pressure hydraulic fluid source for supplying hydraulic fluid to one of the at least two hydraulic rotary valves, wherein movement of the at least two hydraulic rotary valves by the engine crankshaft allows hydraulic fluid to flow to the at least one hydraulic actuator to actuate an engine valve.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: November 24, 2015
    Inventors: Amir Khajepour, Mohammad Pournazeri
  • Publication number: 20150217975
    Abstract: A system and apparatus for controlling a mobile platform via cables is disclosed. Each of the set of cables are connected at one end to the platform at a second end to a cable controlling mechanism, the cable controlling mechanism including a motor to control a length and tension of the cable. At least two of the cables form a constraint, such as a kinematic constraint to the apparatus in order to limit the movement of the platform in certain degrees of freedom.
    Type: Application
    Filed: February 4, 2015
    Publication date: August 6, 2015
    Inventor: Amir KHAJEPOUR
  • Patent number: 9074588
    Abstract: In a traditional hybrid air engine it is complicated to adjust valve timing to compensate for different engine operating modes. Provided is an air compression method and apparatus. The air compression method can be carried out in a single stage with a plurality of air tanks (61, 63) coupled to a compressor (51). The compressor (51) may be a cylinder Air is added to the compressor (51) at atmospheric pressure. Pressurized air is then added to the compressor (51) from a low pressure air tank (61). The compressor (51) compresses the air and transfers a portion of it to a high pressure air tank (63). The remaining portion of the compressed air is transferred to the low pressure air tank (61) for use in the next compression cycle A cam shaft (27) having a two stroke cam (93) and a four stroke cam (95) for each intake valve (59) and exhaust valve (55, 57) is provided to control valve timing during different operating modes.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: July 7, 2015
    Inventors: Amir Khajepour, Amir M. Fazell, Cecile Devaud, Nasser Lashgarian Azad
  • Publication number: 20140190429
    Abstract: The disclosure is directed at a valvetrain actuation (VA) system for an engine comprising at least two hydraulic rotary valves connected to an engine crankshaft, at least one hydraulic actuator driven by the at least two hydraulic rotary valves, and a high pressure hydraulic fluid source for supplying hydraulic fluid to one of the at least two hydraulic rotary valves, wherein movement of the at least two hydraulic rotary valves by the engine crankshaft allows hydraulic fluid to flow to the at least one hydraulic actuator to actuate an engine valve.
    Type: Application
    Filed: August 9, 2012
    Publication date: July 10, 2014
    Inventors: Amir Khajepour, Mohammad Pournazeri
  • Patent number: 8762004
    Abstract: A pulse active steering control system and method for use in a motor vehicle for improving vehicle stability by reducing a likelihood for rollover and/or skidding sends pulses to the steerable wheels whenever a rollover coefficient and/or the difference between the estimated and actual yaw rate is outside a predetermined range. The pulses are asymmetrical in the form of a smooth curve with a gradually increasing rapid rising edge and a slower falling edge and provide steering input that, along with the driver steering input, returns the rollover coefficient and/or yaw rate to the predetermined range to reduce the likelihood of rollover and/or skidding.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: June 24, 2014
    Inventors: Amir Khajepour, Che-Jen Christoph Kuo, John Joseph McPhee
  • Patent number: 8672335
    Abstract: A suspension system between two bodies, the suspension system including: a first pressure chamber provided between the bodies; and at least one other pressure chamber provided between the bodies such that the at least one other pressure chamber opposes the action of the first pressure chamber; and a control system to control the pressure and volume in the first pressure chamber and the at least one other pressure chamber to adjust the stiffness value of the suspension system independently of adjusting a distance between the bodies.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: March 18, 2014
    Inventors: Amir Khajepour, Zhihong Yin, Dongpu Cao, Babak Ebrahimi
  • Publication number: 20130047595
    Abstract: In a traditional hybrid air engine it is complicated to adjust valve timing to compensate for different engine operating modes. Provided is an air compression method and apparatus. The air compression method can be carried out in a single stage with a plurality of air tanks (61, 63) coupled to a compressor (51). The compressor (51) may be a cylinder Air is added to the compressor (51) at atmospheric pressure. Pressurized air is then added to the compressor (51) from a low pressure air tank (61). The compressor (51) compresses the air and transfers a portion of it to a high pressure air tank (63). The remaining portion of the compressed air is transferred to the low pressure air tank (61) for use in the next compression cycle A cam shaft (27) having a two stroke cam (93) and a four stroke cam (95) for each intake valve (59) and exhaust valve (55, 57) is provided to control valve timing during different operating modes.
    Type: Application
    Filed: May 6, 2010
    Publication date: February 28, 2013
    Inventors: Amir Khajepour, Amir M. Fazell, Cecile Devaud, Nasser Lashgarian Azad
  • Publication number: 20110266410
    Abstract: A suspension system between two bodies, the suspension system including: a first pressure chamber provided between the bodies; and at least one other pressure chamber provided between the bodies such that the at least one other pressure chamber opposes the action of the first pressure chamber; and a control system to control the pressure and volume in the first pressure chamber and the at least one other pressure chamber to adjust the stiffness value of the suspension system independently of adjusting a distance between the bodies.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 3, 2011
    Inventors: Amir Khajepour, Zhihong Yin, Dongpu Cao, Babak Ebrahimi
  • Publication number: 20100024934
    Abstract: A suspension for a wheel rotatably mounted about an axle, comprising means to resiliently support the axle from movement in the plane of the wheel's rotation in response to an input to the wheel.
    Type: Application
    Filed: July 31, 2008
    Publication date: February 4, 2010
    Inventors: AMIR KHAJEPOUR, Geoffrey Boyer, Nasser Lashgarian Azad
  • Patent number: 7367771
    Abstract: The present invention provides parallel, cable based robotic manipulators, for use in different applications such as ultra high-speed robots or positioning devices with between three to six degrees of freedom. The manipulators provide more options for the number of degrees of freedom and also more simplicity compared to the current cable-based robots. The general structure of these manipulators includes a base platform, a moving platform or end effector, an extensible or telescoping central post connecting the base to moving platform to apply a pushing force to the platforms. The central post can apply the force by an actuator (active), or spring or air pressure (passive) using telescoping cylinders. The robotic manipulators use a combination of active and passive tensile (cable) members, and collapsible and rigid links to maximize the benefits of both pure cable and conventional parallel mechanisms.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: May 6, 2008
    Inventors: Amir Khajepour, Saeed Behzadipour, Robert Dekker, Edmon Chan
  • Patent number: 7367772
    Abstract: The present invention provides parallel, cable based robotic manipulators, for use in different applications such as ultra high-speed robots or positioning devices with between three to six degrees of freedom. The manipulators provide more options for the number of degrees of freedom and also more simplicity compared to the current cable-based robots. The general structure of these manipulators includes a base platform, a moving platform or end effector, an extensible or telescoping central post connecting the base to moving platform to apply a pushing force to the platforms. The central post can apply the force by an actuator (active), or spring or air pressure (passive) using telescoping cylinders. The robotic manipulators use a combination of active and passive tensile (cable) members, and collapsible and rigid links to maximize the benefits of both pure cable and conventional parallel mechanisms.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: May 6, 2008
    Inventors: Amir Khajepour, Saeed Behzadipour, Robert Dekker, Edmon Chan
  • Publication number: 20080033615
    Abstract: A pulse active steering control system and method for use in a motor vehicle for improving vehicle stability by reducing a likelihood for rollover and/or skidding sends pulses to the steerable wheels whenever a rollover coefficient and/or the difference between the estimated and actual yaw rate is outside a predetermined range. The pulses are asymmetrical in the form of a smooth curve with a gradually increasing rapid rising edge and a slower falling edge and provide steering input that, along with the driver steering input, returns the rollover coefficient and/or yaw rate to the predetermined range to reduce the likelihood of rollover and/or skidding.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 7, 2008
    Inventors: Amir Khajepour, Che-Jen Kuo, John McPhee
  • Publication number: 20070113699
    Abstract: The present invention provides parallel, cable based robotic manipulators, for use in different applications such as ultra high-speed robots or positioning devices with between three to six degrees of freedom. The manipulators provide more options for the number of degrees of freedom and also more simplicity compared to the current cable-based robots. The general structure of these manipulators includes a base platform, a moving platform or end effector, an extensible or telescoping central post connecting the base to moving platform to apply a pushing force to the platforms. The central post can apply the force by an actuator (active), or spring or air pressure (passive) using telescoping cylinders. The robotic manipulators use a combination of active and passive tensile (cable) members, and collapsible and rigid links to maximize the benefits of both pure cable and conventional parallel mechanisms.
    Type: Application
    Filed: January 23, 2007
    Publication date: May 24, 2007
    Inventors: Amir Khajepour, Saeed Behzadipour, Robert Dekker, Edmon Chan
  • Publication number: 20070113700
    Abstract: The present invention provides parallel, cable based robotic manipulators, for use in different applications such as ultra high-speed robots or positioning devices with between three to six degrees of freedom. The manipulators provide more options for the number of degrees of freedom and also more simplicity compared to the current cable-based robots. The general structure of these manipulators includes a base platform, a moving platform or end effector, an extensible or telescoping central post connecting the base to moving platform to apply a pushing force to the platforms. The central post can apply the force by an actuator (active), or spring or air pressure (passive) using telescoping cylinders. The robotic manipulators use a combination of active and passive tensile (cable) members, and collapsible and rigid links to maximize the benefits of both pure cable and conventional parallel mechanisms.
    Type: Application
    Filed: January 23, 2007
    Publication date: May 24, 2007
    Inventors: Amir Khajepour, Saeed Behzadipour, Robert Dekker, Edmon Chan
  • Patent number: 7218035
    Abstract: A micro-positioning device adapted for displacement in a direction of travel. The device has a frame, an actuator attached to the frame, and a hydraulic booster attached to the frame and operably connected to the actuator. The actuator is adapted for activation and de-activation in sequence to achieve a displacement in the direction of travel. The hydraulic booster is adapted for amplifying or de-amplifying displacement in the direction of travel. The hydraulic booster converts mechanical energy into hydraulic energy and converts hydraulic energy into mechanical energy to modify the displacement.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: May 15, 2007
    Assignee: University of Waterloo
    Inventors: Amir Khajepour, Kirsten Morris, Sara Behjat