Reflected Inertia?

[archiver]

Posted by ChrisH at 04/27/2001 12:23 PM EST


Engineer on team #330, Beach 'Bots, from Hope Chapel Academy and NASA JPL, J & F Machine, Raytheon, et al.


In Reply to: Re: That's what I was looking for
Posted by Tom S. on 04/26/2001 8:53 PM EST:



Tom,

The original post came about as a result of reading several articles in trade mags about positional controls. They all used the term "refected inertia" but none either explained what it was or how to caclulate it. They did state that it was desireable to have it be no more than 10 times the inertia of the motor (which is on at least some of the spec sheets we got at the kickoff).

I knew what inertia was, but reflected inertia was new to me. It was also new to everyone else on our team. So I thought I'd ask for an explanation. The problem is not necessarily the control program, it is more designing a system including the mechanical elements that will perform as intended.

I honestly don't know much about our control program, as I'm a mechanical kind of guy. But a control program that tells the arm to go up when needed, is great, unless you don't have adequate torque or power to move the arm. I'm more concerned with the torque part of things right now. (We can always fix the software later ). But if I can design an arm that makes the control guys life easier, then that is even better.

Chris Husman, PE
Team 330 the Beach'Bots

PS. It's good to see that us Inguneers aren't the only one who read this forum.