Now showing items 1-16 of 16

    • Adaptive Guidance and Control for Hypersonic Vehicles 

      Johnson, Eric N.; Calise, Anthony J.; Curry, Michael D. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2006-05)
      Guidance and control technology is recognized as an important aspect of the military, civil, and commercial goal of reliable, low-cost, aircraft-type operations into space. Here, several guidance and control methods ...
    • Adaptive Output Feedback Control of a Flexible Base Manipulator 

      Yang, Bong-Jun; Calise, Anthony J.; Craig, James I. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-07)
      This paper considers augmentation of an existing inertial damping mechanism by neural network-based adaptive control, for controlling a micromanipulator that is serially attached to a macromanipulator. The approach ...
    • Adaptive Trajectory Control for Autonomous Helicopters 

      Johnson, Eric N.; Kannan, Suresh K. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2005)
      For autonomous helicopter flight, it is common to separate the flight control problem into an inner loop that controls attitude and an outer loop that controls the translational trajectory of the helicopter. In previous ...
    • An Adaptive Vision-Based Approach to Decentralized Formation Control 

      Sattigeri, Ramachandra J.; Calise, Anthony J.; Evers, Johnny H. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004-12)
      In considering the problem of formation control in the deployment of intelligent munitions, it would be highly desirable, both from a mission and a cost perspective, to limit the information that is transmitted between ...
    • Adaptive, Integrated Guidance and Control Design for Line-of-Sight-Based Formation Flight 

      Kim, Byoung Soo; Calise, Anthony J.; Sattigeri, Ramachandra J. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-10)
      This paper presents an integrated guidance and control design for formation flight using a combination of adaptive output feedback and backstepping techniques. We formulate the problem as an adaptive output feedback ...
    • Augmenting Adaptive Approach to Control of Flexible Systems 

      Calise, Anthony J.; Yang, Bong-Jun; Craig, James I. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004)
      This paper describes an approach for augmenting a linear controller design with a neural-network-based adaptive element. The basic approach involves formulating an architecture for which the associated error equations have ...
    • A Compact Guidance, Navigation, and Control System for Unmanned Aerial Vehicles 

      Christophersen, Henrik B.; Pickell, R. Wayne; Neidhoefer, James C.; Koller, Adrian A.; Kannan, Suresh K.; Johnson, Eric N. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2006-05)
      The Flight Control System 20 (FCS20) is a compact, self-contained Guidance, Navigation, and Control system that has recently been developed to enable advanced autonomous behavior in a wide range of Unmanned Aerial Vehicles ...
    • Development and Test of Highly Autonomous Unmanned Aerial Vehicles 

      Johnson, Eric N.; Proctor, Alison A.; Ha, Jin-Cheol; Tannenbaum, Allen R. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004-12)
      This paper describes the design, development, and testing of Unmanned Aerial Vehicles (UAV) with highly automated search capabilities. Here, systems are able to respond on their own in the presence of considerable uncertainty ...
    • Flight-Test Results of Autonomous Airplane Transitions Between Steady-Level and Hovering Flight 

      Johnson, Eric N.; Wu, Allen D.; Neidhoefer, James C.; Kannan, Suresh K.; Turbe, Michael A. (Georgia Institute of Technology, 2008-03)
      Linear systems can be used to adequately model and control an aircraft in either ideal steady-level flight or in ideal hovering flight. However, constructing a single unified system capable of adequately modeling or ...
    • Limited Authority Adaptive Flight Control for Reusable Launch Vehicles 

      Johnson, Eric N.; Calise, Anthony J. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2003-11)
      In the application of adaptive flight control, significant issues arise due to limitations in the plant inputs, such as actuator displacement limits, actuator rate limits, linear input dynamics, and time delay. A method ...
    • Modeling, Control, and Flight Testing of a Small Ducted Fan Aircraft 

      Johnson, Eric N.; Turbe, Michael A. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2006-07)
      Small ducted fan autonomous vehicles have potential for several applications, especially for missions in urban environments. This paper discusses the use of dynamic inversion with neural network adaptation to provide an ...
    • Neural-Network Augmentation of Existing Linear Controllers 

      Sharma, Manu; Calise, Anthony J. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2005-01)
      A method to augment existing linear controllers with a multilayer neural network is presented. The neural network is adapted online to ensure desired closed-loop response in the face of parametric plant uncertainty; ...
    • Real-Time Vision-Based Relative Aircraft Navigation 

      Johnson, Eric N.; Calise, Anthony J.; Watanabe, Yoko; Ha, Jin-Cheol; Neidhoefer, James C. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-03)
      This paper describes two vision-based techniques for the navigation of an aircraft relative to an airborne target using only information from a single camera fixed to the aircraft. These techniques are motivated by ...
    • System Integration and Operation of a Research Unmanned Aerial Vehicle 

      Johnson, Eric N.; Schrage, Daniel P. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2004-01)
      The use of flight simulation tools to reduce the schedule, risk, and required amount of flight testing for complex aerospace systems is a well-recognized benefit of these approaches. However, some special challenges arise ...
    • Vision-Aided Inertial Navigation for Flight Control 

      Wu, Allen D.; Johnson, Eric N.; Proctor, Alison A. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2005-09)
      Many onboard navigation systems use the Global Positioning System to bound the errors that result from integrating inertial sensors over time. Global Positioning System information, however, is not always accessible since ...
    • Visual Search Automation for Unmanned Aerial Vehicles 

      Johnson, Eric N.; Proctor, Alison A.; Ha, Jin-Cheol; Tannenbaum, Allen R. (Georgia Institute of TechnologyIEEE, 2005-01)
      This paper describes the design, development, and testing of an Unmanned Aerial Vehicle (UAV) with automated capabilities: searching a prescribed area, identifying a specific building within that area based on a small ...