The article presents comparison of Order Tracking and Autotracking methods of vibration signals analyses for assessing a technical condition of the rotors system of marine gas turbine engines. Results of tests were registered in run-up and shut-down processes of the turning of rotors system. Comparisons of results enable to present conclusions for application both methods for diagnosing marine gas turbine engines DR type in non-steady states

A method of failure diagnosis of automotive gearboxes is introduced. This method is applied at the last stage of the production process during final quality control. The author describes in detail the methods of diagnostic signals processing. Moreover, procedures of diagnostic deduction and algorithms for locating a gearbox failure is presented.

In the article the method of diagnosing failures of automotive gearboxes was intro-duced. This method applies to production processes during final quality control. The method of diagnostic signal processing with the use of amplitude demodulation and autocorrelation function was described in detail. Moreover, the procedure of diagnostic deduction and algorithm of gearbox failure identification was presented.