Engineering Commons^™

Design Of A Combustion System Simulating Waste Heat Recovery From Diesel Engine Exhaust Gases, Nikolaos Papadopoulos

Mechanical & Aerospace Engineering Theses & Dissertations

A forced-draft laboratory combustion system simulating diesel engine exhaust gas volume flow rate and temperature conditions for waste energy recovery is analyzed and discussed. The system consists of a fan which supplies the air. The slightly compressed air is then ducted through a combustor where it is heated, and then to an air-quencher where it is cooled to a desired temperature. Finally, the air is sent through a heat exchanger, after a diffuser process, for waste heat recovery.

A gas dynamic analysis has been performed for each component part as well as a parametric study via a computer program in …

The Development Of A Microprocessor Controlled Linearly Actuated Valve Assembly, Raymond H. Wall

Mechanical & Aerospace Engineering Theses & Dissertations

The development of a proportional fluid control valve/assembly is presented. This electro-mechanical system is needed for space applications to replace the current proportional flow controllers that use bulky hydraulic or pneumatic actuation systems. The flow is controlled by a microprocessor system that monitors the control parameters of upstream pressure and requested volumetric flow rate. The microprocessor achieves the ·proper valve stem displacement by means of a digital linear actuator. A linear displacement sensor is used to measure the valve stem position. 'Ibis displacement is monitored by the microprocessor system as a feedback signal to close the control loop. With an …

Derivations For Discrete-Time Cumulant Control, Henk Albert Roelant

Electrical & Computer Engineering Theses & Dissertations

Expressions for discrete-time cumulant control systems are derived. These expressions are useful for both control system performance analysis and controller selection. Derivation of the performance cumulant expressions parallels the development for the continuous-time case. Two matrix difference equations based on the first two-cumulants are derived. A heuristic procedure for controller selection using the two matrix difference equations paralleling the procedure for the continuous-time case is developed.

Block Transform Coding Of Presample Filtered Data, Thomas A. Shull

Electrical & Computer Engineering Theses & Dissertations

This dissertation addresses the application of non-adaptive transform coding for bit rate reduction of presampled filtered data. Transform coding is examined as an alternative to conventional pulse code modulation (PCM) for multi-source, fixed rate data acquisition systems. Typical bandlimiting presample filters introduce redundancy into the sequence of data samples. Linear transformation of successive N-length blocks of the data sequence and subsequent binary coding of the resulting components is shown to lead to reduced average bit rate for the same less distortion as PCM.

Four Butterworth filters, two corresponding to eight bit PCM systems, and two corresponding to ten bit PCM …

Shape Optimization For Elastic Hollow Bars In Torsion, Jahau Lewis Chen

Mechanical & Aerospace Engineering Theses & Dissertations

The problem of finding optimal cross-sectional shapes of elastic hollow bars in torsion is formulated and solved numerically. A variational formulation for the state equation is presented, and the material derivative of continuum mechanics is used for the shape design sensitivity analysis. Performance criteria include the bending stiffness, the torsional rigidity, and the weight of the bar. The existence of a keyway, an example of geometric irregularity, can be considered as well. The material can be either isotropic or anisotropic. The finite element method is used for the numerical solution of the variational state equation and is integrated into an …

Design Of Multivariable Feedback Control Systems Via Spectral Assignment Using Reduced-Order Models And Reduced-Order Observers, Preston Ivanhoe Carraway Iii

Electrical & Computer Engineering Theses & Dissertations

The feasibility of using reduced-order models and reduced-order observers with eigenvalue/eigenvector assignment procedures is investigated. A review of spectral assignment synthesis procedures is presented. Then, a reduced-order model which retains essential system characteristics is formulated. A constant state feedback matrix which assigns desired closed loop eigenvalues and approximates specified closed loop eigenvectors is calculated for the reduced-order model. It is shown that the eigenvalue and eigenvector assignments made in the reduced order system are retained when the feedback matrix is implemented about the full order system. In addition, those modes and associated eigenvectors which are not included in the reduced-order …

Irish H & V News

Building Services Engineering

No abstract provided.

Test 1508: Ford 1910 (12x4) Synchro Diesel 12-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Test 1509: Ford 2110 (12x4) Manual Diesel 12-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Test 1510: Ford 2110 (12x4) Synchro Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Test 1507: Ford 1910 (12x4) Manual Diesel 12-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Application Of An Optimization Technique To The Chattanooga Area Regional Transportation Authority (Carta) Bus System, Fernando R. Chacon

Masters Theses and Doctoral Dissertations

The purpose of this project is to apply a mathematical model and optimization techniqu,e to the Chattanooga Area Regional Transportation Authority (CARTA).A survey of recent urban tranaportation models was completed and the model demand most specific and applicable was chosen.A computer technique of sensitivity analysis was used in order to complete the model . A comparison of the analytical results with the current bus system was made. The results obtained in this project provide a framework in which CARTA may plan for more efficient operations.

A Basic Computer Program For The Gaussian Equation For A Point Source, Harold M. Cota

Civil and Environmental Engineering

Many readers now are using microcomputers in their work. The advantages of these inexpensive and powerful tools are being recognized by both industry and universities. Microcomputers can be used in lengthy calculations, simulations, data collection and handling, and word processing. Programming these computers can be done in numerous languages such as Basic, Fortran and Pascal. It is often possible to find commercial programs or software available to handle a given application. There are a growing number of programs published which are now in the public domain. Only a limited number of programs dealing with air pollution problems are available ready …

Traffic Accident Rates In Kentucky (1982), Kenneth R. Agent

Kentucky Transportation Center Research Report

The primary objective of this study was to determine average accident statistics in Kentucky for 1982. These statistics could then be used in Kentucky's high-accident location identification program. The 1982 data were combined with 1980 and 1981 data to calculate more long-term accident statistics. Average accident rates were calculated using several methods of classifying highways. A series of tables was prepared giving criteria that could be used to determine if specific locations have accident problems.

Periodic Nondestructive Evaluation Of In-Service Metal Bridges, Theodore Hopwood Ii, Robert C. Deen

Kentucky Transportation Center Research Report

Metal bridges are subject to in-service fracture problems mainly caused by fatigue. This report considers the prevention of bridge failure by the performance of periodic nondestructive evaluations. Differences in visual and other nondestructive inspect ions are discussed. The use of preliminary inspection strategies for proper testing also is presented. The suitability of common types of nondestructive testing for bridge inspections also are included.

Acuta Enews March & April 1984, Vol. 13, No. 3 & 4

ACUTA Newsletters

In This Issue

President's Message

Party Line

Bits & Pieces

Telpak May Be Dead, But Closer Look Shows a Better Deal Ahead

Metro Tel lntroduces Quick Call 2000 For "intelligent" Speed Dialing And LCR

If A Client Orders Whiskey and Beef At Lunch, lt May Be A Power Move

Illegal Telephone Calls Hit Total Of $350,000

Thickness Design Procedure For Portland Cement Concrete Pavements, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

Past experience in Kentucky indicated that thickness designs using portland cement concrete best agreed with criterion used in the Portland Cement Association's design method for 2 or 3 million EAL's or less. For EAL's greater than 3 million, past experience best agreed with criterion developed from the AASHO Road Test.

Research reported herein indicates the two criteria become asymptotic at approximately 2.5 million EAL's. The merger of the criteria is presented, and the combined criterion is coupled with the principal of equal work as defined in classical physics to produce thickness design curves for portland cement concrete pavements. Research has …

Irish H & V News

Building Services Engineering

No abstract provided.

View-3 And Ada: Tools For Building Systems With Many Tasks, Ann Kratzer, Mark Sherman

Dartmouth Scholarship

This paper discusses some useful features for tools that are intended to be used for developing systems with multiple tasks. We include a description of one tool that has been built, View-3. We also describe some problems that might be encountered when trying to fit this kind of tool into an APSE system.

Acuta Enews February 1984, Vol. 13, No. 2

ACUTA Newsletters

In This Issue

President's Message

Bits & Pieces

Corporation Managers of Telecommunication Find Job Gets Tougher

It's Rush Hour For "Telecommuting"

Cutting The Cord Of Office Bell Ringers

Solar Distillation Of Water, Florida Solar Energy Center, Ross Mccluney

FSEC Energy Research Center®

The Florida Solar Energy Center receives frequent requests for information about solar distillation for purifying water. Distillations is one of many processes available for water purification, and sunlight is one of several forms of heat energy that can be used to power that process. Sunlight has the advantage of zero fuel cost but it requires more space (for its collection) and generally more costly equipment.

To dispel a common belief, it is not necessary to boil water to distill it. Simply elevating its temperature, short of boiling, will adequately increase the evaporation rate. In fact, although vigorous boiling hastens the …

Thickness Design Curves For Portland Cement Concrete Pavements, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

Past experience indicates that thickness designs using portland cement concrete best agree with criterion used in the Portland Cement Association's design method for 18-kip EAL of 2 to 3 million or less. For EALs greater than 2 to 3 million, past experience best agrees with criterion developed from the AASHO Road Test. Research herein indicates the two criterion become asymptotic to each other at approximately 2.5 million EAL. For a variation in thickness and elastic moduli in portland cement concrete, dense-graded aggregate, and sub grade elastic modulus, research indicates that a general conic equation (included herein) very closely duplicates the …

Irish H & V News

Building Services Engineering

No abstract provided.

Analysis Of Deflection Temperature Under Load, Anand M. Jagani

Theses

Deflection Temperature Under Load (DTUL) is an experimental value commonly used by designers to characterize a plastic in a high temperature environment. This value is currently measured by a standard test procedure specified by the ASTM D-648. A theoretical analysis of this test was made and computer programs were developed to calculate the Deflection Temperaure of Plastics Under Load based upon temperature dependent flexural modulus data and temperature dependent thermal properties of the plastics of interest. The results obtained from the theoretical analysis agree closely with the experimental values found in the literature for two resins. An analysis of the …

An Inquiry Into Engineering Career Choice And Career Satisfaction, Gunars Bachs

Theses

The purpose of this thesis was to ascertain factors that motivate a person to study engineering, and to examine the aspects of engineering career satisfaction. This study was conducted as a survey by means of a mail questionnaire, which was distributed among graduates of New Jersey Institute of Technology. Another sample, comprised of master's degree recipients of NJIT who had received their bachelor's degree from other undergraduate schools, served as a control group.

Motivation factors and positive and negative aspects of the engineering career were established and ranked in order of their importance. A method to measure career satisfaction was …

Designing Fire Protecton For Steel Beams, American Iron And Steel Institute, Subcommittee On Fire Technology Of The Committee On Construction Codes And Standards

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Acuta Enews January 1984, Vol. 13, No. 1

ACUTA Newsletters

In This Issue

President's Message

Colorado State University

Potpourri

Resale of Telephone Service to Students

Telecom Managers Need to Check Impact of Post-Divestiture Changes on Networks

Conclusion Five

Bits N' Pieces

Fall 1984, 90.9 Wmpg Fm

WMPG Program Guides

No abstract provided.

Summer 1984, 90.9 Wmpg Fm

WMPG Program Guides

WMPG Program Guide, Summer 1984,

Test 1532: Hesston 80-66dt And 80-66 Fiat Diesel 12-Speeds, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …