Gear Fatigue Diagnostics and Prognostics
Abstract
This progress report covers the first period of funding (April 2012-September 2012). The first objective was to collect meaningful gear fault progression data starting from healthy NASA-designed spur test gears and ending with failed parts. Because tooth breaking gives rise to catastrophic failures of larger systems that employ gearboxes, the focus was placed on this failure mode. Data has been collected with the development of prognostic algorithms in mind. With previously designed, fabricated, and instrumented fixtures (one for single gear tooth fatigue, and one for gear-on-gear dynamometer-based tester) we have been collecting crack initiation and crack propagation data. Acoustic emission (AE) sensors, with the accompanying signal processing and software, furnished by VTD, has been added to both fixtures (one at a time) to collect acoustic emission data in parallel with the existing signals: force, displacement, and crack-propagation data (single-tooth fatigue tester); and torque, angular speed, vibration, temperature, and crack-propagation (gear-on-gear dynamometer-based tester). The main outcome of the study will be a database with raw data, accompanying computed condition indicators (CIs), and photographs. In addition, the developed tools for processing the data, viewing the data, and modifying the data in the database will also be included, with associated documentation. The current effort is a continuation of the work that was performed under Award No. W911NF- 09-2-0002. The prior work included development of fixtures, the first version of the algorithms, methods, and procedures for crack initiation and crack propagation, and preliminary database design.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2013
- Accession Number
- ADA577427
Entities
People
- Nenad G. Nenadic
Organizations
- Rochester Institute of Technology