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Aerospace Engineering

Missouri University of Science and Technology

1993

Articles 1 - 13 of 13

Full-Text Articles in Engineering

Experimental Investigation On The Longitudinal Stability Of A P51 Mustang Aircraft Model, Erich Fitzpatrick Jan 1993

Experimental Investigation On The Longitudinal Stability Of A P51 Mustang Aircraft Model, Erich Fitzpatrick

Opportunities for Undergraduate Research Experience Program (OURE)

This project involved the development of a test model of the P-51 Mustang aircraft and an experimental investigation of its stability. The model was developed to investigate the influence of the main horizontal tail parameters ( tail incidence, position of c.g., stabilizer moment arm,etc.)on the pitching moment around the aircraft’s center of gravity. To accomplish such a task, a test model was designed and fabricated with flat plate and airfoil wing configurations. The tail incidence of the flat plate stabilizer is adjustable over the entire range of positive and negative angles. A rechargeable, electric motor mounted in the fuselage adjusts …

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Aerodynamics Of Solar Vehicles, Richard R. Pardun Jan 1993

Aerodynamics Of Solar Vehicles, Richard R. Pardun

Opportunities for Undergraduate Research Experience Program (OURE)

The purpose of this research project is to design the shape of a fully road worthy vehicle operating under nothing but the power of the sun. This vehicle was to meet all racing regulations of The Sunrayce and the World Solar Challenge. Because of the specific use of this vehicle, this project provides a chance to explore the aerodynamically ideal vehicle. Little attention has to be paid to practicality. The result is a very streamlined, highly aerodynamically efficient car, that is still stable and safe.

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Analysis Of A Thrust Vectoring Fighter Aircraft Using Realtime Flight Simulation, Clinton A. Thessen Jan 1993

Analysis Of A Thrust Vectoring Fighter Aircraft Using Realtime Flight Simulation, Clinton A. Thessen

Opportunities for Undergraduate Research Experience Program (OURE)

A real-time flight simulation model based on the McDonnell Douglas F/A-18 Hornet was created. This model was then modified with two different styles of thrust vectoring so that a study of each system's effect on the aircraft's pitch performance could be conducted in order to determine the best system. At present, work is proceeding on the development of active flight controls for the aircraft. After that effort is completed the thrust vectoring study can begin.

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Vortex Developments Over An Accelerated Airfoil At High Angles Of Attack, Jacopo A. Frigerio Jan 1993

Vortex Developments Over An Accelerated Airfoil At High Angles Of Attack, Jacopo A. Frigerio

Opportunities for Undergraduate Research Experience Program (OURE)

Proper control of unsteady separated flow developments over the lifting surfaces of an aircraft may prove to be an effective method of enhancing aerodynamic lift and producing better aircraft performance. Due to the complexity of unsteady flow separation and subsequent flow developments, experimental exploration and observation are essential in providing a source for comparison and verification with theoretical and computational models. In light of these motivations, a new experimental system that is capable of generating wide of range of unsteady flow histories has been developed and employed to visualize flow developments over an airfoil in accelerated-decelerated motion. The paper presents …

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Development Of A Data Acquisition System For Common Velocity Anemometers, Dane P. Drefke Jan 1993

Development Of A Data Acquisition System For Common Velocity Anemometers, Dane P. Drefke

Opportunities for Undergraduate Research Experience Program (OURE)

The objective of this project was to develop a software package that would allow more efficient, accurate, and easier use of wind tunnel data. The software was to receive an analog signal from an array of hot wire anemometers, convert the signal to a digital format, and then process the raw data, converting it into values of properties which have practical value to the user. Unfortunately, due to scheduling conflicts, this project never left the software development stage. The user interface was successfully designed. The signal conversion portion of the package was not completed and the package was never tested.

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Second Law Analysis Of Active Magnetic Regenerative Hydrogen Liquefiers, L. Zhang, S. A. Sherif, T. N. Veziroglu, John W. Sheffield Jan 1993

Second Law Analysis Of Active Magnetic Regenerative Hydrogen Liquefiers, L. Zhang, S. A. Sherif, T. N. Veziroglu, John W. Sheffield

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Recent published work in the area of magnetic refrigeration reports on its potential for greater efficiency and high reliability. This paper presents an exergy analysis of a three-stage active magnetic regenerative (AMR) hydrogen liquefier which cools a hydrogen gas stream at 77 K and 1 atm to hydrogen liquid at 20 K. Ortho - para conversion of hydrogen is accomplished in a heat exchanger employing a 10 atm helium fluid that cycles in the refrigerator. The performance of the system is described in terms of the cooling capacity and exergy losses as functions of the magnetic material type, magnetic bed …

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Analytical Guidance Laws And Integrated Guidance/Autopilot For Homing Missiles, S. N. Balakrishnan, Donald T. Stansbery, J. H. Evers, J. R. Cloutier Jan 1993

Analytical Guidance Laws And Integrated Guidance/Autopilot For Homing Missiles, S. N. Balakrishnan, Donald T. Stansbery, J. H. Evers, J. R. Cloutier

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An approach to integrated guidance/autopilot design is considered in this study. It consists of two parts: 1) recognizing the importance of polar coordinates to describe the end game in terms of problem description and measurement acquisition, the terminal guidance problem is formulated in terms of polar coordinates; 2a) through the use of the state transition matrix of the intercept dynamics, a closed form solution for the transverse command acceleration is obtained; and 2b) through a commonly used approximation on time-to-go and a coordinate transformation, a family of proportional navigation optimal guidance laws is obtained in a closed form. A typical …

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Computer Simulation Of Three-Dimensional Mechanical Assemblies: Part Ii - Computer Simulation, T. C. Chou, Frank W. Liou Jan 1993

Computer Simulation Of Three-Dimensional Mechanical Assemblies: Part Ii - Computer Simulation, T. C. Chou, Frank W. Liou

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Computer simulation of the kinematic and dynamic behaviors of mechanical assemblies has become a very important tool in design and manufacturing, because the designer can foresee how a product is going to perform before the product is actually fabricated. However, up to now, the most current simulation modules are based on analysis from another kinematic or dynamic module by specifying the mating conditions between components, and then displaying the motion on the screen. This computer simulation actually performs similarly to a movie and can only provide visual checking. The drawback of this simulation approach is that designers are forced to …

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On The Use Of Levy's Method For Symmetrically Laminated Composite Plates, Serge Abrate Jan 1993

On The Use Of Levy's Method For Symmetrically Laminated Composite Plates, Serge Abrate

Mechanical and Aerospace Engineering Faculty Research & Creative Works

For rectangular plates with two opposite edges simply supported and no bending twisting coupling, Levy's method can yield exact solutions for static deflections, free vibrations and buckling loads. However, three distinct solutions are obtained, depending on the relative magnitude of the plate rigidities, which in turn are functions of material properties, laminate thickness and lay-up. In this communication a stiffness invariant formulation is used to identify those laminates which fall under the three cases defined. © 1993.

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Computer Simulation Of Three-Dimensional Mechanical Assemblies: Part I - General Formulation, Yong Fang, Frank W. Liou Jan 1993

Computer Simulation Of Three-Dimensional Mechanical Assemblies: Part I - General Formulation, Yong Fang, Frank W. Liou

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In Part I of this paper, a dynamic modeling system for the simulation of three-dimensional mechanical assemblies is presented. With this simulation tool, a designer can interactively create an assembly of mechanical components ready for dynamic analysis. The modeling system presented in this paper include» the derivation of the equations of motion of spatial multi-body systems, and the formulation of the equations to model the associated collision detection and collision responses. Part II of this paper is to introduce the geometry modeling and computer simulation of 3D systems.

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On Minimizing Thermal Deflections Of Laminated Plates, Serge Abrate Jan 1993

On Minimizing Thermal Deflections Of Laminated Plates, Serge Abrate

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Thermal deflections of symmetrically laminated plates that are continuous over many line supports are determined using the Rayleigh-Ritz method. The constitutive equations and the thermal loads are expressed in terms of four non-dimensional lamination parameters. Layups that minimize thermal deflections are determined for several types of composite plates subjected to temperature increases that vary linearly through the thickness.

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Procase: A Prototype Of Intelligent Case-Based Process Planning System With Simulation Environment, Hao Yang, Wen F. Lu Jan 1993

Procase: A Prototype Of Intelligent Case-Based Process Planning System With Simulation Environment, Hao Yang, Wen F. Lu

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An intelligent case-based process planning system with interactive graphic simulation environment, PROCASE, is developed lo demonstrate an integrated methodology of case-based process planning system. In PROCASE, both the mechanical part features and the machining operations are represented with a frame-based scheme. PROCASE contains a retriever, a modifier, a simulator and a repairer. It distinguishes itself from traditional rule-based process planning systems by representing the process planning knowledge through previous process planning cases instead of production rules. It therefore can overcome some problems in the traditional rule-based expert systems. PROCASE currently resides in IRIS Indigo workstation. With a user-friendly graphic environment, …

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Observations On Higher-Order Beam Theory, A. Bhimaraddi, K. Chandrashekhara Jan 1993

Observations On Higher-Order Beam Theory, A. Bhimaraddi, K. Chandrashekhara

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A parabolic shear-deformation beam theory assuming a higher-order variation for axial displacement has been recently presented. In this theory, the axial displacement variation can be selected so that it results in a suitable admissible transverse shear-strain variation across the depth of the beam. This paper examines several transverse shear-strain variations that can go with the aforementioned higher-order theory. Apart from the usual simple parabolic variation, six other shear-strain variations are considered: the sinusoidal variation, cubic, quartic, quintic, and sixth-order polynomials. All these variations for transverse shear-strain satisfy the requirement that the shear strain be zero at the extreme fibers (z …

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