When a rocket is launched, the satellites they carry are subjected to extreme levels of vibration and sound pressure, sometimes in excess of 145 dB. In space, the satellite must be able to withstand such extreme conditions and function reliably without failing. To achieve this, extensive tests are conducted using:
- Acoustic excitation;
- Vibration-related excitation; and
- Shock excitation.
Acoustic Control System (ACS)
Satellites are usually exposed to acoustic irradiation on huge, low-reflection testbenches using electro-pneumatic high-intensity horns in varying frequency ranges. The acoustic control system (ACS) regulates the sound excitation by means of closed loop algorithms, allowing the user to record microphone and vibration signals simultaneously.
Another test scenario for the final testing of satellites involves vibration tests that utilize swept-sine excitation using shakers. For this task area, PAK offers a reliable system solution for dynamic data acquisition and for efficiently analyzing multi-channel measurement data, such as the sine reduction analysis using a COLA signal (Constant Output Level Adapter).
Shock Response Spectrum (SRS)
The Shock Response Spectrum (SRS) is available to the user for providing detailed analyses of a satellite’s transient excitation and shock excitation.