Is it possible to get spectral aliases with an ADXL345? For example, suppose I am sampling at a 400 Hz. rate, expecting to see a 100 Hz vibration. But my mechanical system has an unknown vibration at 550 Hz. The alias of this (when sampled at 400 Hz) would appear at 150 Hz.
As a test designer, do I need to be concerned about the possibility of aliasing in the design of my experiments?
In my case, I'm conducting measurements of main rotor vibrations on a helicopter, and there is so much going on (gear box vibration, turbine wheel vibrations, tail rotorr stuff) that identifying all of the possible aliases is a challenge.
Thanks in advance for your help.