Patents by Inventor Douglas C. Hittle

Douglas C. Hittle 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: 20090223160
    Abstract: Agglomerate tile structures and ceiling tile structures: The agglomerate tile structures can be of a single layer having an intermixed granular base medium comprised of one or more subcomponent materials (e.g., powdered, crushed, chips, and/or other broken pieces of varying sized particles, of quartz, granite, limestone, marble, glass, ceramic, semiprecious stones, etc.), plus a binder material and a PCM component; or the agglomerate tile structures can be of multiple layers, such as having an outer wear-layer substantially absent of PCM component—this outer wear-layer being bonded or otherwise incorporated with a second layer comprised of a binder material and a PCM component, substantially absent of the granular base medium.
    Type: Application
    Filed: February 6, 2009
    Publication date: September 10, 2009
    Applicant: Colorado State University Research Foundation (CSURF)
    Inventors: Douglas C. Hittle, Amy Sarah Lee
  • Patent number: 7117045
    Abstract: A neural network controller in parallel with a proportional-plus-integral (PI) feedback controller in a control system. At least one input port of the neural network for receiving an input signal representing a condition of a process is included. A first set of data is obtained that includes a plurality of output values of the neural network obtained during a training period thereof using a plurality of first inputs representing a plurality of conditions of the process. The process/plant condition signals generally define the process/plant, and may include one set-point as well as signals generated using measured systems variables/parameters. In operation, the neural network contributes to an output of the PI controller only upon detection of at least one triggering event, at which time a value of the first set of data corresponding with the condition deviation is added-in thus, contributing to the proportional-plus-integral feedback controller.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: October 3, 2006
    Assignee: Colorado State University Research Foundation
    Inventors: Douglas C. Hittle, Charles Anderson, Peter M. Young, Christopher Delnero, Michael Anderson
  • Publication number: 20040170806
    Abstract: Agglomerate tile structures and ceiling tile structures: The agglomerate tile structures can be of a single layer having an intermixed granular base medium comprised of one or more subcomponent materials (e.g., powdered, crushed, chips, and/or other broken pieces of varying sized particles, of quartz, granite, limestone, marble, glass, ceramic, semiprecious stones, etc.), plus a binder material and a PCM component; or the agglomerate tile structures can be of multiple layers, such as having an outer wear-layer substantially absent of PCM component-this outer wear-layer being bonded or otherwise incorporated with a second layer comprised of a binder material and a PCM component, substantially absent of the granular base medium.
    Type: Application
    Filed: March 1, 2004
    Publication date: September 2, 2004
    Applicant: University of Colorado Research Foundation
    Inventors: Douglas C. Hittle, Amy Sarah Lee
  • Patent number: 6665651
    Abstract: A feedback control system for automatic on-line training of a controller for a plant, the system having a reinforcement learning agent connected in parallel with the controller. The learning agent comprises an actor network and a critic network operatively arranged to carry out at least one sequence of a stability phase followed by a learning phase. During the stability phase, a multi-dimensional boundary of values is determined. During the learning phase, a plurality of updated weight values is generated in connection with the on-line training, if and until one of the updated weight values reaches the boundary, at which time a next sequence is carried out to determine a next multi-dimensional boundary of values followed by a next learning phase.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: December 16, 2003
    Assignee: Colorado State University Research Foundation
    Inventors: Peter M. Young, Charles Anderson, Douglas C. Hittle, Matthew Kretchmar
  • Publication number: 20030074338
    Abstract: A feedback control system for automatic on-line training of a controller for a plant, the system having a reinforcement learning agent connected in parallel with the controller. The learning agent comprises an actor network and a critic network operatively arranged to carry out at least one sequence of a stability phase followed by a learning phase. During the stability phase, a multi-dimensional boundary of values is determined. During the learning phase, a plurality of updated weight values is generated in connection with the on-line training, if and until one of the updated weight values reaches the boundary, at which time a next sequence is carried out to determine a next multi-dimensional boundary of values followed by a next learning phase.
    Type: Application
    Filed: July 18, 2002
    Publication date: April 17, 2003
    Inventors: Peter M. Young, Charles Anderson, Douglas C. Hittle, Matthew Kretchmar
  • Publication number: 20030055798
    Abstract: A neural network controller in parallel with a proportional-plus-integral (PI) feedback controller in a control system. At least one input port of the neural network for receiving an input signal representing a condition of a process is included. A first set of data is obtained that includes a plurality of output values of the neural network obtained during a training period thereof using a plurality of first inputs representing a plurality of conditions of the process. The process/plant condition signals generally define the process/plant, and may include one set-point as well as signals generated using measured systems variables/parameters. In operation, the neural network contributes to an output of the PI controller only upon detection of at least one triggering event, at which time a value of the first set of data corresponding with the condition deviation is added-in thus, contributing to the proportional-plus-integral feedback controller.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 20, 2003
    Inventors: Douglas C. Hittle, Charles Anderson, Peter M. Young, Christopher Delnero, Michael Anderson
  • Patent number: 6408256
    Abstract: An apparatus and method for evaluation of a material having a first and second contact-surface. The apparatus includes a computer-controlled thermally-variable central element comprising a first and second outer surface, at least one outer surface having at least one temperature sensor thereon. Facing the first outer surface is a first exterior surface of a first thermally-variable side element, and facing the second outer surface is a second exterior surface of a second thermally-variable side element. A mechanism is a second exterior surface of a second thermally-variable side element. A mechanism is included that operates to move at least the first exterior surface toward the thermally-variable central element to apply a generally uniform pressure against the material contact-surfaces once the material has been so positioned.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: June 18, 2002
    Assignee: Colorado State University Research Foundation
    Inventors: Douglas C. Hittle, Tifani L. André