Downloaded from https://www.everyspec.com ADS-79D-HDBK CONTENTS PARAGRAPH PAGE D.7.7 Summary ..............................................................................................................99 APPENDIX E VIBRATION BASED DIAGNOSTICS ...........................................................100 E.1 SCOPE ...............................................................................................................100 E.2 REFERENCES AND APPLICABLE DOCUMENTS .....................................100 E.3 TECHNICAL GUIDANCE ...............................................................................101 E.3.1 Sensor guidance .................................................................................................101 E.3.1.1 Sensitivity ..........................................................................................................101 E.3.1.2 Dynamic range ...................................................................................................102 E.3.1.3 Linearity ............................................................................................................102 E.3.1.4 Drift ...................................................................................................................102 E.3.1.5 Bandwidth ..........................................................................................................102 E.3.1.6 Installation .........................................................................................................103 E.3.1.7 Built-in test capability .......................................................................................103 E.3.1.8 Sensor Reliability ..............................................................................................103 E.3.2 Data acquisition and signal processing guidance ..............................................103 E.3.2.1 Data acquisition conditions ...............................................................................103 E.3.2.2 Data acquisition interval ....................................................................................104 E.3.2.3 Analog to digital conversion .............................................................................104 E.3.2.4 Resolution (Dynamic Range) ............................................................................104 E.3.2.5 Sampling Rate ...................................................................................................104 E.3.2.6 Data windowing .................................................................................................104 E.3.3 Diagnostic algorithm guidance ..........................................................................105 E.3.3.1 Computational efficiency ..................................................................................105 E.3.3.2 Physical description ...........................................................................................105 E.4 EXISTING VIBRATION BASED DIAGNOSTICS ........................................105 E.4.1 Shaft condition indicators ..................................................................................106 E.4.2 Shaft balance and rotor smoothing ....................................................................106 E.4.2.1 Shaft balance .....................................................................................................106 E.4.3 Bearing condition indicators ..............................................................................106 E.4.4 Gear condition indicators ..................................................................................107 APPENDIX F ROTOR TRACK AND BALANCE .................................................................108 F.1 SCOPE ...............................................................................................................108 F.2 REFERENCES AND APPLICABLE DOCUMENTS .....................................108 F.3 DEFINITIONS ..................................................................................................108 F.4 INTRODUCTION .............................................................................................108 F.5 GENERAL GUIDANCE ...................................................................................108 F.6 TECHNICAL GUIDANCE ...............................................................................108 APPENDIX G TURBOSHAFT ENGINE AND AUXILIARY POWER UNIT (APU) CONDITION BASED MAINTENANCE (CBM) ........................................111 viii