Newly implemented is multi-sine excitation into our VibControl shaker control systems. This test mode allows you to simultaneously sweep up to 10 sine tones at different levels across the desired frequency range. A typical sweep rate is 1 octave/min. for all sine frequencies. The sine tones are independent from each other and have their own digital tracking filters allowing for precise, fast control. They can be switched on/off individually.
Multi-sine excitation is a new technique which has its seeds in the German automotive industry. The objective was to largely reduce the costs and time of durability tests: For example, if you need 100 hours for a standard sine sweep test, the test duration will be reduced to 20 hours with five sine tones performed in parallel.