In this Issue:
1. VibControl 2.11 Revision Available
Our VibControl products for advanced vibration testing from 4 to hundreds of input channels are used by many of the leading environmental test laboratories throughout the world.
Our latest VibControl Rev. 2.11 introduces a lot of new useful capabilities and enhancements to our software, a few of them are:
This software update is of course free to all our VibControl customers with current maintenance contracts.
For more information, please read our 4-page VibControl Rev. 2.11 Update Note or email us at email@example.com.
2. Mobile 96-Channel Data Acquisition System for Turbomachinery Testing
Siemens AG is a global powerhouse in electronics and electrical engineering, operating in the industry, energy and healthcare sectors. At its location in Duisburg/Germany, Siemens uses m+p international’s mobile Coda data acquisition system for in-house or on-site turbomachinery testing.
The mobile Coda system supports 96 channels to measure temperatures, pressures, flows and strains. It consists of a 19” rackmount case, a VXIbus mainframe and the signal conditioning units. Operation is done via an external laptop which will be connected via
CAT-5 and fiber optics cables.
Siemens has been successfully utilizing a range of m+p international’s Coda systems for continuous data acquisition, data processing and real-time monitoring for several years at its test facilities in Duisburg. These stationary Coda data acquisition units acquire and verify not only the performance data and thermodynamic parameters but also the vibration data of turbomachines. Several turbomachines are tested in parallel for acceptance tests. A single stationary data acquisition unit acquires up to 168 process signals and 48 vibration signals.
The mobile 96-channel Coda system supports the existing stationary Coda units and significantly expands the possibilities of turbomachinery testing at Siemens.
For more information on this interesting application please read our 2-page Application Note Mobile Data Acquisition System for Turbomachinery Testing or our new 8-page Coda brochure.
3. SO Analyzer and MATLAB Working in Harmony
SO Analyzer is m+p international's renowned dynamic data acquisition, analysis and reporting system with integrated analysis across a wide range of applications from Modal to Sound Quality.
To use your own MATLAB scripts with SO Analyzer it can co-operate with MATLAB in two ways: file exchange using MAT files or via remote program control.
1. File Import/Export
For flexible data exchange with all your systems SO Analyzer supports an impressive variety of import and export file formats including UFF/UNV, WAVE, TEXT, RPC3 and MATLAB’s MAT format. The MAT file exporter has built-in intelligence to structure measurement names and header information to better suit MATLAB. The following screenshot shows an example of 4 frequency response functions being exported from an SO Analyzer to MATLAB:
This interface simplifies the procedure and ensures naming consistency. Optionally full data header data can be transferred enhancing reporting and auditing.
2. Remote Control
SO Analyzer and MATLAB can also operate interactively utilising SO Analyzer’s User Programming capability; the programming language is BASIC. A User Program can be used as a macro and assigned to a user defined menu operation for repeated operation.
For example this command in MATLAB produces a 2-dimensional array containing a hump:
Here is the resulting plot:
The SO Analyzer code required to create the same hump in a MATLAB workspace is as follows:
strMessage = matlab.Command ("x=1.5*humps(0.:0.01:3.)+10.;")
You can see that this simple BASIC instruction can be used to send any command to MATLAB.
The SO Analyzer instruction required to transfer the hump back to SOA is as follows:
lResult = matlab.GetWorkspace ("w", ws)
Here is the data in SO Analyzer:
These operations of transferring data to MATLAB, manipulating the data and then transferring it back can be undertaken without running MATLAB, the only proviso being that MATLAB is installed on the system.
Existing users will find two user programs in the UserPrograms directory which can be used for familiarisation and the basis for developing user specific procedures:
mm2Matlab.BAS – transfer data from SOA to MATLAB and plot it
Matlab2mm.BAS – generate data in MATLAB and transfer it to SOA
4. Dates for Your Diary
Please visit m+p international at the following events this spring:
Aerospace Testing Seminar
Interactive Technical Interchange
March 29-31, 2011
Sheraton Gateway Hotel
Los Angeles, CA
Noise & Vibration Conference and Exhibition
May 16-18, 2011
DeVos Place Convention Center
Grand Rapids, MI
Booth # 205
We would be pleased to see you.
For more information please contact: firstname.lastname@example.org
Well, that brings to a close this edition of the m+p international Newsletter. If there are items of info you would like to see here or if you have useful tips for the rest of the environmental test world, then please send us your pointers and we'll include them in the next edition.
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