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HI DESCRIPTION OF APPARATUS AND PROCEDURES
ANALYTICAL AND EXPERIMENTAL RESULTS
2-direction 20 FREQUENCY accelerometer Admittance Matrix Formulation admittance matrix method admittance parameters aluminum Antiresonance applied Blocked Impedance Response Blocked Impedance Test combined system component computed diagonal matrix discrete frequencies elements Equation 17 Error on System Excitation at F3 Excitation at Point experimental Figure 16 Figure 17 final results Flexible Payload Excitation flexible payload installed flexible payload model free-free Hz Figure matrix method produces matrix multiplication Measurement Coordinate System measurement error Model Showing Measurement nonsymmetry output force payload admittance matrix payload and orbiter Payload Model Showing payload vibration tests physical models 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 Sample results Showing Measurement Coordinate shown in Figure Southwest Research Institute space shuttle steady-state sinusoidal system with flexible tance matrix Test of Flexible transmission matrix approach Transmission Matrix Formulation transmission matrix method