[AR] Re: LRE Test Stand Data Acquisition and Control Best Practices
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Thu, 19 Jan 2017 00:45:38 -0500 (EST)
(My, the Arocket mail has piled up while I was preoccupied... Let's see
if I can catch up a bit.)
On Thu, 12 Jan 2017, Ben Brockert wrote:
Certainly. There are lots of ways to cause yourself unnecessary
difficulties that are still safe and possible, given enough effort.
How many LPRE stands have you worked on, by the way? I thought you did
smallsats.
Just one, so far, and it probably doesn't count yet... But nothing in
what I said is specific to LPRE test stands. The general principle of
rigorously separating critical control functions from everything else has
wider application, and indeed is widely applied. (One of Nancy Leveson's
papers pointed out that neglect of this principle was the root cause of
the loss of Ariane 501.)
I also note that a couple of the folks who chimed in to agree with me have
built and operated *lots* of LPRE test stands.
Henry
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