Shake Rattle and Roll ............

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Welcome to our latest newsletter about the Vibration & Environmental test world in addition to the latest information from m+p international.

 

 

   The next m+p Seminar date is set.....................

 

OK Here it is as promised in our last newsletter, the next m+p seminar will be on Tuesday 16 September.  It will once again be held at Loughborough University and this time we will be concentrating all day on Signal and Modal Analysis.  This seemed to be the greatest area of interest from the first seminar and so we thought this time we would spend the day on one subject. 

 

It will again be a very practical day with lots of useful advice and help to actually carry out the test work.  We will again cover the basics of the theory but we will not baffle you with high level maths.

 

The planned agenda includes, Introduction to signal and Modal analysis by Dr Steve Rothberg of Loughborough University, Advice and considerations for succesful Modal test set up, Practical demonstrations of impact hammer and Modal analysis, Workshop where everyone gets a chance for some hands on experience, if they want it and Modal modification and FE correlation.

 

We are expecting another sell out, so PLEASE, PLEASE book your place early.  The cost will again be £95 + VATt for the day, including course notes, refreshments and lunch.  As everyone found out last time, it doesn't get any better than this!

 

For further information and a booking form please email sales.uk@mpihome.com

 

 

SmartOffice - At last an alternative to high cost maintenance.................. 

 

 

Over the last 6 months our SmartOffice product has seen continued development and we can now offer such a complete package that there is a real alternative to spending £30,000 per annum in maintenance for existing acquisition and analysis systems.  We have experienced several cases recently where SmartOffice has been evaluated against alternative and existing systems and has been selected as the most complete and easiest to use all round system for acquisition, Modal analysis, rotating machinery analysis and Acoustic analysis.  Both portable and desk based systems are available on a variety of front ends, even existing hardware can be used in many cases.

 

Depending on your current set up, you can now replace all your systems for little more than 1 years maintenance cost and then see a 90% drop in your annual maintenance cost.  To make that initial justification even better we can extend the initial warranty period to 2 years at no extra cost!!!

 

Sounds interesting? contact sales.uk@mpihome.com for more details on pricing and for information

 

  Multi-Channel Transient Recorder...............

 

m+p international's TransRecorder is a multi-channel transient recorder featuring a 800 kSA/s sample rate. Based on the 4-channel Agilent E1564A VXI digitizer, which allows input ranges of up to 256 V, a VXI mainframe and an IEEE-1394 FireWire interface card system, configurations of up to 48 channels are supported. The data can be stored on the on-board memory of up to 128 Mbytes. The transient recorder is ideally suited for recording and analysing electronic and mechanical transient waveforms in manufacturing test, product development and engineering research. This also applies to environments with high levels of electrical noise, requiring particularly good common mode noise rejection. Applications include underwater acoustics, pyroshock and jet-engine testing.

 

WHY the dolphin ??   Figure that one out yourselves.........................

 

For more info please send enquiry to sales.uk@mpihome.com

 

 

Technical Titbits......................

 

A vibration test titbit this month and just a small one too!

 

A recent query I had about one of the variables used when setting up a random vibration test, 'What is DOF and what does it do?' 

 

Well of course it is Degrees of Freedom, but not in a spatial co-ordinate sense, i.e when you think about a body in space it has varying numbers of Degrees of Freedom linked to its movement ability, the DOF varies depending on which if any parts of the body are fixed.

 

However the Degrees of Freedom used in the set up of a random test is a statistical measurement and it is linked with the number of fully independent variables that are entered into a calculation to compute the end result.  So in vibration controller terms it is linked to the number of measurements that contribute to the control signal average used in the next output loop correction.  The higher the DOF the more measurements are used and vice-versa. In the case of a non-overlapped block averaged measurement the DOF is simply twice the number of blocks - do you know why it is twice the blocks?

 

The next question of course is Does this actually help ?????... we hope so !! ......

 

Please send your queries and ideas for future titbits to me sales.uk@mpihome.com