PVS002 Physical Testing
Ramp up then very, very slow cyclic loading, first 16 secs
Same data, emphasizing the first second
Same data, Force Error, first 16 secs.
Part of the same data, after stabilizing
These “Max Endlevel Errors as a Function of Frequency” are some older data from two different load frames from the rest of my data. These were at R=-1, Max level 10,000 lbf. Errors are pretty flat until we get below 2-5Hz.
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Just added some more data. Free actuator displacement, free force transducer reading. I had to use a frame with sampling rate set to 1024 Hz so I went up to only 20 Hz cycling, but it looks interesting.
The sine sweep shows a curious phenomenon. The error amplitude is nearly independent of frequency. This suggests the errors are not inertially induced. Starting a post to explore that.
https://open.substack.com/pub/albrightj/p/pvs002-sine-sweep-analysis