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Filtering by: Creator Ohman, Mark D. Remove constraint Creator: Ohman, Mark D. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • 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

  • Robust lateral pulse jet control of an atmospheric rocket

    Creator:
    Burchett, Bradley Thomas
    Abstract:
    Uncontrolled direct fire rockets exhibit high impact point dispersion, even at relatively short range, and as such have been employed as area weapons on the battlefield. In order to reduce the dispersion of a direct fire rocket, feedback control is employed to fire short-duration solid rocket pulses mounted near the...
    Resource Type:
    Dissertation
    Full Text:
    Rocket. Abstract approved:_ ________ Mark F. Costello Uncontrolled direct fire rockets exhibit high

  • Modified linear theory and Kalman filtering for in flight projectile impact point prediction

    Creator:
    Hainz, Leonard C.
    Abstract:
    A method for real time in-flight prediction of the ground impact point of an indirect fire projectile is investigated. The method investigated is comprised of a combination of an impact point predictor and an extended Kalman filter state estimator based on modified linear theory. The modified linear theory model is...
    Resource Type:
    Masters Thesis
    Full Text:
    Prediction. Abstract approved: Mark F. Costello A method for real time in-flight prediction of the

  • Dynamic modeling, control and linear theory of a projectile equipped with a rotating internal part

    Creator:
    Frost, Geoffrey W.
    Abstract:
    Dynamic modeling of the atmospheric flight mechanics of a projectile equipped with an uncontrolled internal rotating disk is investigated and a modified projectile linear theory is established. It is shown through modeling of this type of projectile that several coefficients of the epicyclic dynamics are altered, leading to changes in...
    Resource Type:
    Dissertation
    Full Text:
    INTERNAL PART IN ATMOSPHERIC FLIGHT Geoffrey W. Frost and Mark F. Costello Journal of Guidance, Control

  • 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:
    Plate Equation for the Prediction of Ink Droplets in Inkiet Cartridges. Abstract approved: Mark F

  • 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

  • Dynamic modeling, control aspects and model predictive control of a parafoil and payload system

    Creator:
    Slegers, Nathan J.
    Abstract:
    Control issues are investigated for a parafoil and payload system with left and right parafoil brakes used as the control mechanism. It is shown through dynamic modeling and simulation that parafoil and payload systems can exhibit two basic modes of lateral control, namely, roll and skid steering. Using a small...
    Resource Type:
    Dissertation
    Full Text:
    Mark F. Costello Control issues are investigated for a parafoil and payload system with left and

  • 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

  • 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