Prediction of Payload Vibration Environments by Mechanical Admittance Test Techniques |
Common terms and phrases
100 FREQUENCY ACCELEROMETER admittance matrix method admittance tests AVERAGE ADMITTANCE MATRIX BENDING P/L M5 Blocked Impedance Response Blocked Impedance Test CO/QUAD analyzer combined system component computed Daniel D diagonal matrix discrete frequencies Equation 17 Error on System Excitation at F2 Excitation at Point EXPERIMENT 10 ADMITTANCE Experimental Response Figure 13 Figure 17 final results Flexible Payload Excitation Flexible Payload Installed flexible payload model free-free Hz Figure input M12 ORBITER BENDING matrix method produces matrix multiplication Measurement Coordinate System measurement error Model Showing Measurement ORBITER BENDING P/L P/L M payload and orbiter Payload Blocked Impedance Payload Model Showing piezoelectric PREDICTION OF PAYLOAD procedure rearward transmission matrix resonance Response for Flexible Response with Flexible Response with Rigid rigid body payload Rigid Payload Installed Rigid Payload Model Showing Measurement Coordinate shown in Figure Southwest Research Institute space shuttle System Response tance matrix Test of Flexible Transmission Matrix Formulation transmission matrix method