| From: | David McMinn |
| Date: | 19 Sep 2000 at 01:17:09 |
| Subject: | Re: d.c. motor simulation |
The new local vet, Francis G. Loch, got into old Daisy up to their elbow.
Inside the found Re: d.c. motor simulation.
> Could you not just subtract each value that you have
> to work out the rate of change?
I'm doing that just now to calculate the speed, acceleration and third
derivative (of position). I must be doing something wrong, as it doesn't
look like what it should (I have graphs here showing the expected output
for certain inputs that I ain't gettin).
I was just wondering if anyone had anything that worked. It doesn't need
to be mathematic, just more realistic than the crap simulation I am using
now (which is the only way I've got it to work so far).
speed = input_voltage
position = position + speed * time_step_size
So it doesn't take any kind of friction or inertia into account so it
pretty much sucks :)
Thanks though.
Bye
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