Assessment of diesel engine condition using time resolved measurements and signal processing
By: Joseph E. Bell
Publisher: Naval Postgraduate School
Published: 1996
Place of publication: Monterey, Calif
Language: eng
Number of pages: 114
Description: An experimental investigation was conducted to access methods of detecting, and localizing      faults in a diesel engine. A three cylinder, two stroke Detroit 3-53 engine was heavily      instrumented for time resolved measurements. In particular, a 3,600 count per revolution      optical encoder was used along with accelerometers mounted on various engine structures,      in-cylinder pressure measurements and a variety of steady state sensors, such as exhaust      temperatures. A large number of baseline data were taken to establish the statistical      characteristics on the signals from the engine. These runs were followed by a series of      experiments where the cylinder head assembly bolt torque were varied parametrically.      Standard spectral analysis and Joint Time Frequency Analysis (JTFA) were used to identify      the fundamental vibration characteristics of the engine. The vibration frequencies were      checked for consistency against first order models of the engine assembly and reasonable      agreement was found. In addition, a new technique for accessing engine health using time of      arrival of encoder signals was investigated.
Notes: "September 1996."

Thesis advisor(s): Knox T. MIllsaps.

Thesis (M.S. in Mechanical Engineering) Naval Postgraduate School, September 1996.

Includes bibliographical references (p. 111-112)

Approved for public release; distribution unlimited.

Also available online.

Mode of access: World Wide Web.

System requirements: Adobe Acrobat reader.

US Navy  (USN) author.

dk/dk cc:9116 (2/25/97)