Quote:
Originally Posted by IKE
I know hitting the overpass at 10 fps added a lot of stiction (it really should be a word) to our elevator.
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Rejoice!
Stiction might not be in Webster's, but it's a fairly common term in MechE papers.
Anyways, the Labview System ID Toolkit would definitely do most of the heavy lifting for you, but you should be careful in applying it. Waving about mathematical tools you don't have a good understanding of can leave you looking much like the Sorcerer's Apprentice.
Also, as to ignoring friction effects and swamping the rotor inertia with a larger load inertia..... Again, if you don't care about a 5-10% error, why don't you trust the datasheets? If this is a learning project as IKE proposes, then simply hooking up motors to loads and monitoring them would be fine for exploring the dynamics of how motors work, without worrying about the headaches or expense of trying to exactly model the motors.