Patents by Inventor Steven A. Davidson

Steven A. Davidson 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).

  • Patent number: 10333839
    Abstract: In one aspect, a method includes receiving a data packet at a routing node that includes a processor. The method also includes determining at least one value for the data packet, selecting a routing table from a plurality of routing tables stored at the routing node in response to the at least one value for the packet and forwarding the data packet in response to the routing table selected. Each routing table is associated with a respective one cost function.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 25, 2019
    Assignee: Raytheon Company
    Inventors: Mu-Cheng Wang, Steven A. Davidson, Yi-Chao S. Chuang
  • Patent number: 9537789
    Abstract: In one aspect, a method includes receiving, at a first node in a network, a resource reservation request from a second node in the network, determining, at the first node, if there is another node in the network that can be used to reach a destination and meet the resource reservation request and notifying the second node a result of the determining.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: January 3, 2017
    Assignee: RAYTHEON COMPANY
    Inventors: Mu-Cheng Wang, Paul C. Hershey, Steven A. Davidson
  • Publication number: 20160127257
    Abstract: In one aspect, a method includes receiving, at a first node in a network, a resource reservation request from a second node in the network, determining, at the first node, if there is another node in the network that can be used to reach a destination and meet the resource reservation request and notifying the second node a result of the determining.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 5, 2016
    Inventors: Mu-Cheng Wang, Paul C. Hershey, Steven A. Davidson
  • Patent number: 9270168
    Abstract: A multi-level power converter system includes a multi-level power converter configured to synthesize at least three direct current (DC) voltages into an alternating current (AC) output voltage, and includes a plurality of transistors. A controller generates pulse-width modulation (PWM) signals used to control a state of the plurality of transistors of the multi-level converter by comparing first and second carrier signals to a reference signals, wherein a period of the first and second carrier signals is randomly varied from a nominal period.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 23, 2016
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Adam Michael White, Mustansir Kheraluwala, Steven A. Davidson
  • Publication number: 20140268967
    Abstract: A multi-level power converter system includes a multi-level power converter configured to synthesize at least three direct current (DC) voltages into an alternating current (AC) output voltage, and includes a plurality of transistors. A controller generates pulse-width modulation (PWM) signals used to control a state of the plurality of transistors of the multi-level converter by comparing first and second carrier signals to a reference signals, wherein a period of the first and second carrier signals is randomly varied from a nominal period.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Adam Michael White, Mustansir Kheraluwala, Steven A. Davidson
  • Publication number: 20140268948
    Abstract: A power converter system includes an interleaved power converter having a plurality of parallel-connected phase legs between DC terminals and an AC terminal. A plurality of parallel-connected inductors are each connected to one of the plurality of parallel-connected phase legs to provide a summed output of the parallel-connected phase legs to the AC terminal. A controller generates PWM signals used to control the state of each of the plurality of phase legs by comparing a carrier signal to a reference signal, wherein a period of the carrier signal is randomly varied from a nominal period.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Adam Michael White, Mustansir Kheraluwala, Steven A. Davidson
  • Publication number: 20140279809
    Abstract: A data broker-reasoner (DBR) system for automating mission planning and execution includes a context originating entity, a reasoner/decision entity, and a plurality of enforcement entities. The context originating entity extracts mission policy information from a variety of source materials, including checklists, manuals, and other documentation. The reasoner/decision entity interprets the mission policy in the context of situational awareness (SA) events to determine which policies should be enforced. Each of the enforcement entities is configured to enforce various policies within the context of a given mission lifecycle phase by providing commands, data, and requests to a plurality of user applications and/or other mission systems. The DBR can operate autonomously or semi-autonomously.
    Type: Application
    Filed: December 17, 2013
    Publication date: September 18, 2014
    Applicant: Raytheon Company
    Inventors: Paul C. Hershey, William J. Kyker, Donald H. Leonard, Jason Dudash, Douglas E. Toppin, Christopher J. Graham, Mu-Cheng Wang, Steven A. Davidson
  • Publication number: 20130250955
    Abstract: In one aspect, a method Includes receiving a data packet at a routing node that includes a processor. The method also includes determining at least one value for the data packet, selecting a routing table from a plurality of routing tables stored at the routing node in response to the at least one value for the packet and forwarding the data packet in response to the routing table selected. Each routing table is associated with a respective one cost function.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 26, 2013
    Applicant: Raytheon Company
    Inventors: Mu-Cheng Wang, Steven A. Davidson, Yi-Chao S. Chuang
  • Publication number: 20130088970
    Abstract: Methods and apparatus for transmitting, from a radio, over a router-to-radio interface, a first transmission-on signal indicating to a router that data packets can be sent to the radio for transmission in a network, and transmitting, from the radio over the router-to-radio interface, a first transmission-off signal indicating to the router that data packet transmission should be suspended until receipt of a second transmission-on signal, wherein the first transmission-on signal and the first transmission-off signal are generated in a network layer of the seven-layer OSI model.
    Type: Application
    Filed: October 7, 2011
    Publication date: April 11, 2013
    Applicant: Raytheon Company
    Inventors: Mu-Cheng Wang, Steven A. Davidson, Sam Mohan
  • Patent number: 8023245
    Abstract: A lightning mitigation system for use on an aircraft employs parasitic capacitance associated with a motor/generator to dissipate voltage provided as a result of a lightning strike. The motor/generator includes a set of windings defined by an outer periphery and a case that surrounds the set of windings. A parasitic capacitance is defined by the airgap separating the windings of the motor/generator from the case. A motor controller is electrically connected to the set of windings and includes a filter circuit. The filter circuit includes an equivalent capacitance that is selected based on the parasitic capacitance associated with the motor/generator such that a lightning strike results in a large portion of the voltage being dissipated by the parasitic capacitance of the motor/generator.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: September 20, 2011
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Frank Z. Feng, Steven A. Davidson
  • Publication number: 20100091422
    Abstract: A lightning mitigation system for use on an aircraft employs parasitic capacitance associated with a motor/generator to dissipate voltage provided as a result of a lightning strike. The motor/generator includes a set of windings defined by an outer periphery and a case that surrounds the set of windings. A parasitic capacitance is defined by the airgap separating the windings of the motor/generator from the case. A motor controller is electrically connected to the set of windings and includes a filter circuit. The filter circuit includes an equivalent capacitance that is selected based on the parasitic capacitance associated with the motor/generator such that a lightning strike results in a large portion of the voltage being dissipated by the parasitic capacitance of the motor/generator.
    Type: Application
    Filed: October 13, 2008
    Publication date: April 15, 2010
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Frank Z. Feng, Steven A. Davidson