ESA ESTEC selects Müller-BBM VibroAkustik Systeme
A New Generation for Acoustic Control
The European Space Agency’s Test Centre at ESTEC in Noordwijk, The Netherlands, has selected Müller-BBM VibroAkustik Systeme for the monitoring, data acquisition and control of their Large European Acoustic Test Facility (LEAF). The new Müller-BBM PAK acs Digital Acoustic Control System was installed and commissioned in July 2016 and is fully operational today.
Acoustic noise tests are performed on space hardware mainly to qualify their design and workmanship before the launch. In order to simulate the identical noise spectrum experienced by a space system during its launch inside a reverberation chamber, the amplitude and frequency content of the generated noise needs to be shaped and controlled. Previously, this was done by an automatic control system based on Müller-BBM’s PAK software, installed in 2002. The automatic control permits rapid spectrum adjustments, achieving the desired result in less than 20 seconds with a very tight tolerance.
Based on a proven acoustic control history, the new generation PAK acs utilizes the Müller-BBM PAK MKII measurement hardware with the Wind River® VxWorks® Real Time Operating System to deliver unmatched Speed, Safety and Simplicity, a system that is always in command. Embedded PAK live software functions as a data server providing calibrated measurement data to any computer or smart device simultaneously. It can also operate autonomously without a computer connection with many safety features functioning independently on the PAK MKII hardware. With PAK live, data can be recorded locally in parallel on the computer and transmitted directly for monitoring/analysis using a smart device like an iPad®, iPhone® or Android™ device.
The 48 Input – 4 Output channel PAK acs control system installed at ESA ESTEC utilizes the Müller-BBM PAK MKII ICM42S data acquisition boards with integrated buffered monitoring outputs. Measurement sensors (microphones, accelerometers, strain ...) are phase-synchronized with 24 bit - sampled up to 204.8 kSa/s with the buffered analog signals available for monitoring, in parallel, via a rack mountable breakout box. Four (4) band limited outputs (expandable to 16) are user definable and eliminate the needs for additional external equipment.
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