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  • Two projectiles connected by a flexible tether dropped in the atmosphere

    Creator:
    Frost, Geoffrey W.
    Abstract:
    This study investigates the atmospheric flight dynamics of a munition system and the effect of a tether reel resistance mechanism for limiting the impact that the unreeling process has on the munition system. The munition system consisting of two projectiles connected by a tether line is released from an aircraft...
    Resource Type:
    Masters Thesis
    Full Text:
    Dropped in the Atmosphere. Abstract approved: Mark F. Costello This study investigates the

  • Lateral pulse jet control of a direct fire atmospheric rocket using an inertial measurement unit sensor system

    Creator:
    Jitpraphai, Thanat
    Abstract:
    Impact point dispersion of a direct fire rocket can be drastically reduced with a ring of appropriately sized lateral pulse jets coupled to a trajectory tracking flight control system. The system is shown to work well against uncertainty in the form of initial off-axis angular velocity perturbations as well as...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: Mark F. Costello Impact point dispersion of a direct fire rocket can be drastically

  • Performance of a smart direct fire penetrator using a ram air controlled mechanism

    Creator:
    Chandgadkar, Siddharth Suhaschandra
    Abstract:
    The effectiveness of a direct fire penetrator projectile equipped with an actively controlled ram air mechanism is investigated through dynamic simulation. The ram air control mechanism consists of a rotary sleeve valve which directs air flow from an inlet at the center of the nose to side ports. The projectile...
    Resource Type:
    Masters Thesis
    Full Text:
    : Performance of a Smart Direct Fire Penetrator using a Ram Air Controlled Mechanism. Abstract approved: Mark

  • Solutions of plate equation for the prediction of ink droplets in inkjet cartridges

    Creator:
    Sangplung, Saangrut
    Abstract:
    Droplet formation in inkjet cartridges has been studied for several decades to improve print qualities. Currents and rigid nozzle plates are used inside the cartridge to fix the size of droplets exiting the chamber. This research is focused on studying the effect of nozzle flexibility on droplet formation. A flexible...
    Resource Type:
    Masters Thesis
    Full Text:
    Dr. Mark F. Costello for his guidance and support during my graduate study. I would also like to

  • Model predictive control of a direct fire projectile equipped with canards

    Creator:
    Ollerenshaw, Douglas R.
    Abstract:
    Launch uncertainties in uncontrolled direct fire projectiles can lead to significant impact point dispersion, even at relatively short range. A model predictive control scheme for direct fire projectiles is investigated to reduce impact point dispersion. The control law depends on projectile linear theory to create an approximate linear model of...
    Resource Type:
    Masters Thesis
    Full Text:
    Predictive Control of a Direct Fire Projectile Equipped with Canards Abstract approved: Mark F. Costello

  • Initial state estimation for a gun launched projectile in a spatially varying magnetic field

    Creator:
    Chawla, Feni
    Abstract:
    Smart weapons promise to provide leap ahead capability with regard to accuracy and engagement range for medium and large caliber projectiles. One of the most critical components of a smart weapon system is its sensor suite that provides position, orientation, and velocity information as the projectile flies down range so...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Mark F. Costello Molly H. Shor Smart weapons promise to provide

  • Optimal soaring by a small autonomous glider

    Creator:
    Kyle, Jason A.
    Abstract:
    Extending the flight time of an autonomous unmanned air vehicle by soaring is considered. A suboptimal controller is developed and successful static soaring is demonstrated with a 6 degree of freedom glider model. Altitude gain rates of between ¼ and ½ m/s are achieved with this simple implementation. A hybrid...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: __________________________________________________ Mark F. Costello

  • Human gait analysis by gait pattern measurement and forward dynamic model combined with non linear feedback control

    Creator:
    Ko, Seung-uk
    Abstract:
    Normal gait of human is believed to be an adapted motor control result of optimal behavior of individual. Normal gait would be altered by aging or injury without being perceived. Subtle changes in gait which is not easy to detect, can cause many serious problems including joint pains and even...
    Resource Type:
    Dissertation
    Full Text:
    : _______________________________________________________________ Mark F. Costello Normal gait of human is believed to be an adapted motor control result