Vibration isolation of spacecraft from the launching vehicle

The challenge is to isolate the payload such that at three different sinusoidal excitations of frequencies 5Hz, 25Hz and 100 Hz, the vibration amplitude is to be reduced by 20 dB. The isolation is achieved by the hexapod assembly by using stiff piezoelectric actuators that extend and contract in response to the vibration originating at the base. This hexapod assembly is commonly known as Active Stewart Platform.