MULTI-DEGREE-OF-FREEDOM VIBRATION REDUCTION STRATEGY OF THE SOLAR ARRAY DRIVE SYSTEM

The operation disturbance induced by the solar array drive system (SADS) and the residual vibration of solar array following the attitude adjustment of the spacecraft obviously affect the dynamics environment, quick stabilization, and attitude stability of the high-precision spacecraft.However, these two kinds of vibration disturbance are character

Radiopharmaceuticals labeled with short-lived positron-emitting or gamma-emitting isotopes are injected into patients just prior to performing positron emission tomography (PET) or single photon emission tomography (SPECT) scans, respectively.These imaging modalities are widely used in clinical care, as well as in the development and evaluation of