I've just started training to take over a position in the NVH engineering department, and one of the topics in my training today was brainstorming a list of causes for 2nd harmonic noise in small DC motors (those used for window regulators in automobiles).
Does anyone have any insight they could offer? I'm just beginning to wrap my mind around this stuff. The 2nd harmonic is around 250Hz. We're thinking it's a resonance, but not sure the cause.
Thanks in advance!
Does anyone have any insight they could offer? I'm just beginning to wrap my mind around this stuff. The 2nd harmonic is around 250Hz. We're thinking it's a resonance, but not sure the cause.
Thanks in advance!