[scilab-Users] vibration test analysis

[Celso Co]

Paul,

Everybody is newbe in something new. I am not train to see parasites
in the graph. However, you definitely have some technique in
recognizing them. However, human recognition is definitely not the
same as machine.

I would suggest that you get the text file of the data and put them as
vector variables. Then pretend to be the Scilab and figure an
algorithm (starting with simple task) to come out a certain desired
results. For example you may want to define a threshold level as
filter mechanism. There will be lot of trial and errors until your
algorithm satisfy what you want to see.

If you prefer to use certain tools, you may want to try wavelets. I am
a newbie in wavelets but there must be somebody out there to help us.

cco


On Tue, Oct 12, 2010 at 3:37 AM, Charlie Warner <cwarner7_11 at hotmail.com> wrote:
> Paul-
> if you could send a sample data file (preferably in *.csv format) I could
> have a quick look at it for you and see if I couldn't come up with something
> more specific.
>
> Charlie
> cwarenr7_11 at hotmail.com
>
>> From: paul.carrico at free.fr
>> To: users at lists.scilab.org
>> Date: Mon, 11 Oct 2010 21:15:40 +0200
>> Subject: RE: [scilab-Users] vibration test analysis
>>
>> CCo (and everybody as well)
>>
>> You're right ...
>>
>> I had a rapid look on the suggested documents and I think it's not what
>> I'm looking for (essentially because my request was too general and not
>> accurate enough and because I'm a newbie in Signal processing ==
>> misunderstanding :-))) )
>>
>> In the attached document you'll find typical records from a vibration test
>> on a shaker ... the signal processing has already be done by the equipment &
>> soft.
>>
>> The purpose is to automatically identify ALL the resonances from the
>> measurement ... both using the response/transmissibility's and the phase
>> analysis ... however in the example you can see that there're many parasites
>> in the phase measurements ....
>>
>>
>> Cheers
>>
>> Paul
>>
>> -----Message d'origine-----
>> De : Celso Co [mailto:celso.co at gmail.com]
>> Envoyé : lundi 11 octobre 2010 17:37
>> À : users at lists.scilab.org
>> Objet : Re: [scilab-Users] vibration test analysis
>>
>> Paul,
>>
>> You can encode in scilab your manual procedure. May be you can give a
>> sample raw data and your manual calculation then we can suggest some
>> approaches you may want to try.
>>
>> cco
>>
>> On Mon, Oct 11, 2010 at 4:02 AM, Paul CARRICO <paul.carrico at free.fr>
>> wrote:
>> > All,
>> >
>> >
>> >
>> > Does somebody has ever wrote/coded (under Scilab but not necessary) a
>> > program that analyses the vibration tests results (i.e. automatically
>> > find
>> > the natural frequencies) ?
>> >
>> >
>> >
>> > I do it manually but studying the transmissibility’s and the phase
>> > changes
>> > but I would like to code it under Scilab and of course there won’t be
>> > any
>> > human appreciation/analysis
>> >
>> >
>> >
>> > The purpose of this email is not to have this code but to have
>> > advices/information’s on the method / algorithm and so on !
>> >
>> >
>> >
>> > In any way It’s a good challenge for me
>> >
>> >
>> >
>> >
>> >
>> > Thanks for any help
>> >
>> >
>> >
>> > Paul
>>
>>
>>
>> --
>> Eng'r Celso B. Co, PhD ECE
>> Assistant Professor
>> Dept. of Electronics, Computer, and Communication Engineering,
>> Loyola Schools of Science and Engineering, Ateneo De Manila
>



-- 
Eng'r Celso B. Co, PhD ECE
Assistant Professor
Dept. of Electronics, Computer, and Communication Engineering,
Loyola Schools of Science and Engineering, Ateneo De Manila