r6155 - Thanks!
Ed - I believe the answer to your question is "general vacuum test." We are applying vacuum, closing a valve and shutting off vacuum. Data is vacuum loss (pressure rise) over time.
Can anyone out there direct me to a standard or guide regarding preferred methods for testing pressure vessels? (AIAA, AMSE, NIST, Whatever Association of Pipe-Fitters and Pressure Vessel Experts, etc.) I've read plenty of anecdotal evidence, and intuitively understand how a vacuum test should...
Thank you all for your replies! Some responses and perhaps better insights:
- These parts are currently tested via a positive pressure "bubble test," somewhat as described by CompositePro. We have a requirement to perform some sort of seal check, and this has been the method for some time...
Apologies up front if I missed something in the other replies...
You can certainly use Bernoulli and other similar simplifications(VA_1 = VA_2) for a low speed setup like that. If you're going that route, you could also calculate for a top end around 60mph, and your losses will put you in the...
I am trying to set up a vacuum leak test. I want to apply a vacuum to an assembled panel we produce(~1'x1'x1.5" thick, very little internal space, basically just the space between internal components and outer bezel), then lock the vacuum and measure decay over time. I am thinking ~15-30 mm HG...
Hey everyone, I’m trying to figure out what wind tunnel is featured in the recent iPhone 11 commercials. Any thoughts? It’s obviously a low speed, likely research-based facility. Really not sure if it’s a private or government facility.
What do you guys think? :)
I have two (2) sets of drag coefficients, purportedly for the same thing. These drag coefficients are used in separate aero models. I know a lot about one aero model, and very little about the other. One thing that stands out to me is that one model uses a constant gravity model, whereas the...
Hey All,
So here's my problem: I need to read binary data over a closed wireless network into LabVIEW. I know (or will know) the IP address/Port # for where the data is coming from. This will be live, streaming binary data that I will then have to convert into an array or matrix or whatnot, in...
FeX32,
My bad, I mis-entered the equations in first post
sqrt(x^2+y^2) + t + sqrt((val1-x)^2 + (y-val2)) + Const1 = 0
sqrt(x^2+y^2) + t + Const2 = 0
sqrt(x^2+y^2) + t + 3*sqrt((x-val3)^2 + (z-val3)) + Const3 = 0
sqrt(x^2+y^2) + t + 2*sqrt((val4-y)^2 + (z-val2)) + Const4 = 0
x, y, z, and...
Hello All,
I what what I thought (once again!) was a fairly straight-forward problem to solve, but I can't quite seem to get there. I have 4 eqns, 4 unknowns. Equations are along the lines of:
sqrt(x^2+y^2) + z + sqrt((val1-x)^2 + (y-val2)) + Const1 = 0
sqrt(x^2+y^2) + z + Const2 = 0...
Hopefully this one is easy. I think this should be a no-brainer, but I haven't used LV extensively in quite a while... :P
I have a text file I want to read in to labview (I'm good there); but I want to read it in at, say, 200Hz, as if to simulate a real-time data stream. I'll be using my VI for...
Thanks Brad. I think fzero, or another built-in optimization function, may be what I'm looking for. The pieces are slowly starting to fall back into place.. :)
Thanks to all.
Excellent suggestions...except that I'm on Matlab R2007a, and I only have the Image Processing and Signal Processing toolboxes. That doesn't mean I can't get Optimization or others, but I'm trying to make due with what I have at my disposal.
Very frustrating, as I can...almost...remember...what...
Hey Y'all,
I'm a bit rusty, and could use some help in solving a system of equations. Let's say I have 2 equations, 2 unknowns (simplified for discussion's sake), and one of my equations looks something like:
B1 = (const1)x1 + (const2)x2^2 + sqrt(x1-x2).
Assuming I can't come up with a third...
Allow me to clarify...
Does anyone have any thoughts, suggestions, comments, etc as to the use and effectiveness of an RTOS for microchip circuits for high-speed timing?
I was just trying to cast the proverbial "wider net" in regards to getting additional opinions and viewpoints.
:)
I'm working on a project where I'm programming an ARM microchip that acts as the "brains" on a custom board with other off-the-shelf components. In programming the ARM chip, you can program the other hardware components. Since I'm not overly experienced as a programmer, and not very familiar...
Figures it out...
On the surface (with OS X 10.6.7 and R2010aSV-student version), all I have under Applications is the Matlab Application itself. However, if I "Show Package Contents"...then I get the subcontent you must be seeing, which includes the toolbox folder. Tricky :P
Side note - I...
Does anyone know where/how to access the Matlab Toolbox directory in Mac OS X? On a Windows machine (Win XP), its fairly straightforward: C:\Program Files\MATLAB\R2007a\toolbox.
On OS X, I can't seem to find any such directory, even though I have a half-dozen toolboxes installed. I can't even...
