Experimental Physics and
Thanks for the replies.
Here's more info:
Can you describe a bit more the specifications and how it operates?
Attached is a cut sheet. There's 38 analog and 14 TTL inputs.
We have two core processing tasks for mirror position and vibration control.
This results in a total of 5, 3x3 matrix vector multiplies per cycle. This is to
transform for linear sensor space to AZ/EL tip tilt coordinates.
The legacy DSP's are TI-TMS320.
All the stepper motor control is implemented with TTL lines. So a 20 Hz stepper clock
is realized by skipping sufficient 200 us cycles to generate the clock.
Again, the IO cut sheet shows this as 35 outputs. But only the motors are using the sample rate.
- Is this just for feedback control, or do you need to log the inputs and if so at what rate?
I'm keen on logging inputs up to the sample rate in an engineering mode if it's easy to do.
This would be very useful for tuning the system. At a minimum I'd want to log the inputs at
1 kHz. The closed loop bandwidth of the system is about 100 Hz.
I have a wealth of information if you're interested to understand this better.
|ANJ, 21 Dec 2017||
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