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<== Date ==> | <== Thread ==> |
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Subject: | Re: Recommendations for EPICS Based Data Acquisition System |
From: | Matt Rippa <[email protected]> |
To: | Mark Rivers <[email protected]> |
Cc: | Rolando Rogers <[email protected]>, Talk EPICS Tech <[email protected]> |
Date: | Thu, 7 Dec 2017 12:29:30 -1000 |
Can you describe a bit more the specifications and how it operates?
- How many inputs at 5 kHz?
- How much calculation to determine the outputs?
- How many outputs to be written, and at what rate?
- Is this just for feedback control, or do you need to log the inputs and if so at what rate?
Mark
________________________________
From: [email protected] <[email protected]> on behalf of Matt Rippa <[email protected]>
Sent: Wednesday, December 6, 2017 2:54 PM
To: Talk EPICS Tech
Cc: Rolando Rogers
Subject: Recommendations for EPICS Based Data Acquisition System
Aloha,
I'm looking for your recommendations on the latest data acquisition
hardware, compatible with EPICS.
Our Secondary Mirror system at Gemini has a 1 meter diameter,
55 kg mass. There's 3 degrees of freedom and a 5 kHz control loop.
The system was designed in the 90's by Lockheed Martin, based on
a DOS PC with an ISA backplane (PICMG 1.0) and a DSP data
acquisition board with 16 bit ADC's and DAC's. The DOS PC interfaces
with an EPICS IOC via Reflected Memory.
In 2010 I did a conceptual redesign based on a Hytec Blade 9010 using
IP cards and an Intel CPU running RTEMS. Today it seems FPGA's are
a popular choice for data acquisition. Perhaps a Xylinx zynq solution?
Would anyone still consider VME?
I have no requirement for 5 kHz EPICS control. Although that's intriguing.
Thanks for your time.
-Matt
Attachment:
CEM_IO_Requirements.pdf
Description: Adobe PDF document