Index Catalog // ScholarsArchive@OSU

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

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

Ontologies to Support Repeatable and Valid Customer Requirements Generation

Creator:: Lemke, Mark T.
Abstract:: Due to the growing complexity, sophistication, and interconnectedness of present day engineered products and services, the use of ontologies in engineering design is becoming more widespread. An ontology provides a standardized way of describing concepts in a domain of interest and the relationships between these concepts to better understand the...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mark T. Lemke for the

Numerical solutions of two-dimensional compressible flow about an airfoil

Creator:: Kelly, Mark Warburton
Resource Type:: Masters Thesis
Full Text:: about an airfoil NUMERICAL SOLUTIONS 0F TTO)flNSIONAL COL'RESSIBLE FLOVr ABOUT AN AIRFOIL MARK

Natural convection and conduction in a vertical annulus with a concentric baffle : a numerical study

Creator:: Fishbaugher, Mark J.
Abstract:: Analytical and numerical study of steady-state laminar natural convection and conduction has been performed for an enclosure between concentric vertical cylinders. The inner and outer cylinders were isothermal, and the connecting top and bottom walls were adiabatic. A concentric baffle was included in the annulus, and the flow field and...
Resource Type:: Masters Thesis
Full Text:: with a concentric baffle : a numerical study AN ABSTRACT OF THE THESIS OF Mark J. Fishbauqher for

Analytical method for the prediction of reliability and maintainability based life-cycle labor costs

Creator:: Fitzpatrick, Mark W.
Abstract:: An analytical method for predicting life-cycle maintainability labor costs is developed. The purpose of the analytical method is to allow the evaluation of products, based on life-cycle labor cost, early in the design process. The Boeing 737-300/400/500 Bleed Air Control System is used as a test model, and the results...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mark W. Fitzpatrick for the degree

Experimental development and characterization of a small-scale planar flow casting (PFC) machine

Creator:: Smith, Mark T.
Resource Type:: Masters Thesis
Full Text:: -scale planar flow casting (PFC) machine AN ABSTRACT OF THE THESIS OF Mark Tower Smith for the degree

Mechanical engineering design across cultures : a method of designing for cultures

Creator:: Van Bossuyt, Douglas L.
Abstract:: Mechanical design is often based on formal methodologies such as Quality Function Deployment. Techniques to quantitatively account for attractability, sensory perception, and affective design have been successfully incorporated into these methods and are receiving growing acceptance across many industries. Although the adoption of these methods marks a large improvement for...
Resource Type:: Masters Thesis

Indentation hardness of Douglas fir and Western hemlock lumber related to density

Creator:: Corder, Stanley E.
Abstract:: Indentation hardness tests were made on sections of 211 pieces of Douglas fir and 208 pieces of Western hemlock at a moisture content of about 11 percent. Specific gravity and visual-density evaluations were also determined. Correlation coefficients for linear regression of density, as measured by specific gravity, on average standard...
Resource Type:: Masters Thesis
Full Text:: approved William D. McMullen Indentation hardness tests were made on sections of 211 pieces of Douglas

Stress distribution about a square hole in a uniaxial tension plate

Creator:: Hays, Donald Frank
Resource Type:: Masters Thesis
Full Text:: . . ............ . . ........ . . . . . . . 80 ACKNOWLEDGMiNT To H. D. Christensen, Lssistant Frolessor o1 Ivtechan- Ical Engineering

Mechanical and stress-optical properties of photoelastic materials

Creator:: Teshima, Yoshio
Resource Type:: Masters Thesis
Full Text:: Sincere appreciation is expressed to H. D. Christensen, Assistant Professor of Mechani cal Engineering

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