Now showing items 1-20 of 50

    • 3D Obstacle Detection Using a Single Camera 

      Shah, Syed Irtiza Ali; Johnson, Eric N. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2009-08)
      This paper aims at detecting obstacles using a single camera in an unknown three dimensional world, for 3D motion of an unmanned air vehicle. Obstacle detection is a pre-requisite for collision-free motion of a UAV through ...
    • 6-DOF Nonlinear Simulation of Vision-based Formation Flight 

      Sattigeri, Ramachandra J.; Calise, Anthony J.; Kim, Byoung Soo; Volyanskyy, Konstantin; Kim, Nakwan (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2005-08)
      This paper presents an adaptive guidance and control law algorithm for implementation on a pair of Unmanned Aerial Vehicles (UAVs) in a 6 DOF leader-follower formation flight simulation. The objective of the simulation ...
    • An Adaptive Approach to Vision-based Formation Control 

      Sattigeri, Ramachandra J.; Calise, Anthony J.; Evers, Johnny H. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2003-08)
      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 Control for a Microgravity Vibration Isolation System 

      Yang, Bong-Jun; Calise, Anthony J.; Craig, James I.; Whorton, Mark S. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2005-08)
      Most active vibration isolation systems that try to a provide quiescent acceleration environment for space-science experiments have utilized linear design methods. In this paper, we address adaptive control augmentation ...
    • Adaptive Control for a Microgravity Vibration Isolation System 

      Yang, Bong-Jun; Calise, Anthony J.; Craig, James I.; Whorton, Mark S. (Georgia Institute of Technology, 2005)
      Most active vibration isolation systems that try to a provide quiescent acceleration environment for space-science experiments have utilized linear design methods. In this report, we address adaptive control augmentation of ...
    • Adaptive Control of Evolving Gossamer Structures 

      Yang, Bong-Jun; Calise, Anthony J.; Craig, James I.; Whorton, Mark S. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2006-08)
      A solar sail is an example of a gossamer structure that is proposed as an propulsion system for future space missions. Since it is a large scale flexible structure that requires a long time for its deployment, active ...
    • 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 Neural Network Flight Control Using both Current and Recorded Data 

      Chowdhary, Girish; Johnson, Eric N. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-08)
      Modern aerospace vehicles are expected to perform beyond their conventional flight envelopes and exhibit the robustness and adaptability to operate in uncertain environments. Augmenting proven lower level control algorithms ...
    • 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 output feedback control with input saturation 

      Yang, Bong-Jun; Calise, Anthony J.; Craig, James I. (Georgia Institute of TechnologyIEEE, 2003-06)
      We consider the problem of adaptive output feedback control in the presence of saturating input characteristic. The adaptive control architecture augments an existing linear control design. The approach is applicable to ...
    • 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 ...
    • 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., 2004-08)
      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., 2006-08)
      This paper presents an integrated guidance and control design for formation flight using a combination of adaptive output feedback and backstepping techniques without an underlying time-scale separation assumption. We ...
    • 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 ...
    • Approaches to Vision-Based Formation Control 

      Johnson, Eric N.; Calise, Anthony J.; Sattigeri, Ramachandra J.; Watanabe, Yoko; Madyastha, Venkatesh (Georgia Institute of TechnologyIEEE, 2004-12)
      This paper implements several methods for performing vision-based formation flight control of multiple aircraft in the presence of obstacles. No information is communicated between aircraft, and only passive 2-D ...
    • 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 ...
    • Coordinated Decentralized Adaptive Output Feedback Control of Interconnected Systems 

      Hovakimyan, Naira; Lavretsky, Eugene; Yang, Bong-Jun; Calise, Anthony J. (Georgia Institute of TechnologyAmerican Automatic Control Council, 2004-06)
      A decentralized adaptive output feedback control design is proposed for large-scale interconnected systems. It is assumed that all the controllers share prior information about the system reference models. A linearly ...
    • Design and Implementation of a Self-configuring Ad-hoc Network for Unmanned Aerial Systems 

      Christmann, Hans Claus; Johnson, Eric N. (Georgia Institute of TechnologyAmerican Institute of Aeronautics and Astronautics, Inc., 2007-10)
      Unmanned aerial vehicles (UAVs), and unmanned aerial systems (UAS) as such in general, need wireless networks in order to communicate. UAS are very flexible and hence allow for a wide range of missions by means of utilizing ...