I mean, you can have a look at our data, but I suspect a lot of the
spectral power is going to be at frequencies well above nyquist for
the sampling rate of the IMU, so I don't think it will do you much
good. Not to mention I'm sure there are onboard low pass filters
because usually you _don't_ want the vibration in your acceleration
data.
Some dedicated (strain guage on the airframe and fast >50 kHz ADC?)
equipment on a launch would be pretty fascinating.
-Nathan
PSAS
On Tue, Dec 22, 2015 at 3:55 PM, Monroe L. King Jr.
<monroe@xxxxxxxxxxxxxxxxxx> wrote:
Vibration does matter when your using an IMU. A test flight of the
rocket should give good vibration data. 3 axis data from similar rockets
should be useful.
Amateur rocketeers should have a data base for such data.
If people are willing to send me their data or people will collect
available data I will volunteer to provide a place for that data to be
accessible for all.
I will also make it possible for you to upload your data yourself.
I can provide a place for software as well as useful links to other
data.
If you are willing to participate. Otherwise let me know and I wont
waste my time.
If someone else wants to do it I will assist.
-------- Original Message --------
Subject: [AR] Re: Flight Computer
From: Robert Watzlavick <rocket@xxxxxxxxxxxxxx>
Date: Tue, December 22, 2015 4:39 pm
To: arocket@xxxxxxxxxxxxx
I've been looking for any data folks might have on the typical
frequencies an avionics package might experience in a small rocket. I
suspect though it is highly variable to the construction of the vehicle
and mounting. Yeah, it may not matter but I still can be interested in
it :)
-Bob
On 12/22/2015 08:48 AM, doug knight wrote:
After seeing Wallops shaker tables we went back to the school I was
teaching at and built a mechanical analog from a variable speed motor,
cam and a spring loaded platform. Mount the electronics on the
platform, turn on the motor and vary the speed and tension on spring
holding mount to cam accordingly. Somewhat single frequency from our
accelerometer tests but was very good for functionally simulating a
suborbital flight. Vibration issues were not a problem with those
payloads; student overconfidence, overpromising and changing code at
the last minute though. ;)
Doug Knight