ROTATIONAL STATISTICAL VIBRATION ANALYSIS EMPLOYING SIDEBANDS AND/OR WEIGHTING

摘要: A method of statistical analysis the vibrational characteristics rotary machinery includes a mechanical involved to identify pertinent frequencies therein, such as gear mesh frequencies, together with sidebands created by FM modulation due imperfections parts; selective, narrow band filtering response machinery, at frequency bands including fundamental harmonics thereof and certain upper lower each; determine standard deviations from normal responses choice integral numbers be taken indicative degradation; weighting results test in accordance analytical evaluation various indicating health apparatus under test. typical system for performing helicopter, on-line airborne equipment or ground based equipment, employing general purpose digital computer, logic flow related computer are also disclosed.