Patents by Inventor Ashok Agnihotri

Ashok Agnihotri 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).

  • Acceleration smoothing holding overall kinetic energy control
    Patent number: 9926076
    Abstract: A method and system for controlling maneuverability of an aircraft includes receiving one or more signals indicative of commanded peak rotary acceleration at a first timeperiod; determining a signal indicative of an actual peak rotary acceleration for the first timeperiod in response to the receiving of the one or more signals for commanded pilot acceleration; and determining signals indicative of actual rotary acceleration for a second timeperiod.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: March 27, 2018
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Ashok Agnihotri, Steven D. Weiner, Vineet Sahasrabudhe
  • Yaw control of co-axial rotor
    Patent number: 9452829
    Abstract: A method for controlling rotor blades of a co-axial rotor assembly of an aircraft including a first rotor co-axial with a second rotor includes identifying a first zone of rotor rotation angles of the co-axial rotor assembly. The first zone defines a range of rotor rotation angles corresponding to an up-flow of air to the coaxial rotor assembly, and the remainder of the rotor rotation angles other than the first zone of rotation angles is defined as a second zone. The method includes receiving a yaw command to adjust a yaw moment of the aircraft and applying a different rotor blade angle change to rotor blades in the first zone than a rotor blade angle change applied to rotor blades in the second zone to adjust the yaw moment of the aircraft according to the yaw command.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: September 27, 2016
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Ashok Agnihotri, Steven D. Weiner
  • ACCELERATION SMOOTHING HOLDING OVERALL KINETIC ENERGY CONTROL
    Publication number: 20150314866
    Abstract: A method and system for controlling maneuverability of an aircraft includes receiving one or more signals indicative of commanded peak rotary acceleration at a first timeperiod; determining a signal indicative of an actual peak rotary acceleration for the first timeperiod in response to the receiving of the one or more signals for commanded pilot acceleration; and determining signals indicative of actual rotary acceleration for a second timeperiod.
    Type: Application
    Filed: April 29, 2015
    Publication date: November 5, 2015
    Inventors: Ashok Agnihotri, Steven D. Weiner, Vineet Sahasrabudhe
  • YAW CONTROL OF CO-AXIAL ROTOR
    Publication number: 20150097075
    Abstract: A method for controlling rotor blades of a co-axial rotor assembly of an aircraft including a first rotor co-axial with a second rotor includes identifying a first zone of rotor rotation angles of the co-axial rotor assembly. The first zone defines a range of rotor rotation angles corresponding to an up-flow of air to the coaxial rotor assembly, and the remainder of the rotor rotation angles other than the first zone of rotation angles is defined as a second zone. The method includes receiving a yaw command to adjust a yaw moment of the aircraft and applying a different rotor blade angle change to rotor blades in the first zone than a rotor blade angle change applied to rotor blades in the second zone to adjust the yaw moment of the aircraft according to the yaw command.
    Type: Application
    Filed: October 8, 2013
    Publication date: April 9, 2015
    Applicant: Sikorsky Aircraft Corporation
    Inventors: Ashok Agnihotri, Steven D. Weiner
  • Method and apparatus for improving main rotor yoke fatigue life
    Patent number: 7762501
    Abstract: A method and system for optimizing rotor flapping utilizes the collective stick position and true airspeed to determine a commanded longitudinal stick position.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: July 27, 2010
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Ashok Agnihotri, Helmuth Koelzer, John Schillings, Robert Fortenbaugh
  • Method and apparatus for improving main rotor yoke fatigue life
    Publication number: 20070050099
    Abstract: A method and system for optimizing rotor flapping utilizes the collective stick position and true airspeed to determine a commanded longitudinal stick position.
    Type: Application
    Filed: August 31, 2005
    Publication date: March 1, 2007
    Applicant: Bell Helicopter Textron Inc.
    Inventors: Ashok Agnihotri, Helmuth Koelzer, John Schillings, Robert Fortenbaugh