Prediction of Payload Vibration Environments by Mechanical Admittance Test Techniques |
Contents
DESCRIPTION OF APPARATUS AND PROCEDURES | 16 |
ANALYTICAL AND EXPERIMENTAL RESULTS | 26 |
Flexible Payload Blocked Impedance Results | 34 |
Common terms and phrases
100 FREQUENCY ACCELEROMETER ADMITTANCE MATRIX AVERAGE admittance matrix method admittance tests AVERAGE ADMITTANCE MATRIX BENDING P/L M5 Blocked Impedance Response Blocked Impedance Test combined system component computed Daniel D diagonal matrix discrete frequencies Equation 17 Error on System Excitation at Point Excite at fg EXPERIMENT 10 ADMITTANCE Experimental Response Figure 13 Figure 17 final results Flexible Payload Excitation Flexible Payload Installed flexible payload model free-free G₂T A₂ Hz Figure input M12 ORBITER BENDING M13 ORBITER M10 matrix multiplication MATRIX P/L M13 Measurement Coordinate System measurement error Model Showing Measurement ORBITER M10 P/L P/L M12 ORBITER payload and orbiter 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 method