Any tutorials for analysis, acquisition, PROTOR etc
In automotive NVH circles, ride behaviour is often referred to as primary and secondary ride, but what do these terms really mean. (more…)
A user has three signals captured using a triaxial accelerometer and asked “What is the simplest way to get the XYZ resultant from run-up file?” He had tried forming a resultant of the raw time histories, but didn’t fully understand the resultant time history.
Of course, the correct way of processing the data is to calculate the individual waterfalls from the x, y & z data and then calculate a resultant waterfall. (more…)
How do you measure the causes of a noise or vibration with respect to several sources? Which source is causing what part of the response?
For example, how does the noise inside the cabin of a vehicle relate to the engine noise or wheel hub noise and vibration? (more…)
ODS = Motion of structure vibrating naturally (for example bridge vibration) or when excited by an unknown force (for example generator vibration). Prosig’s Structural Animation software performs ODS analysis.
OMA = Modal Analysis
Prosig’s Modal Analysis software performs OMA. (more…)
A user recently asked…
[su_quote]I was hoping you can give me some way that I can create a plot with two different vertical (Y axis) scaling. I want to plot Principle stress and applied load vs. time on the same plot.
I want to show the principle stress increments on the left side of the graph and the load scale on the right side of the graph. I can do this with some other programs but cannot find a way to do it in DATS for Windows.
Is this POSSIBLE?[/su_quote] (more…)
A step-by-step introduction to creating order and waterfall plots from a time history and a tacho signal. http://www.youtube.com/watch?v=KpO4RLu6Onc
Transfer Path Analysis (TPA) provides the route of the noise or vibration through the structure, not just which sources cause the response, but the route taken. This is useful for developing and improving components like engine anti-vibration mountings or suspension anti-vibration mountings. (more…)
One of Prosig’s engineers was recently creating a complex worksheet application that required some complicated arithmetic to be performed on values calculated in the worksheet. Worksheet (or global) variables are ideal for this. The Variable Mods DPU also has an expression evaluator built in. Consider the following worksheet that takes a Named Element from two signals and sums them. (more…)
The digital tacho channel in a P8000 system offers better time resolution by dividing the main sample period by 16. However it is sometimes difficult to know what level the threshold should be set to so a facility to help you find the optimum level has now been added to the acquisition software. (more…)
The P8012, P8020 & P8048 can all be fitted with the 8440 CAN-bus/GPS card. Setting up the P8000 to capture CAN-bus data is extremely simple. In the following video, James…
Generally. when developing and testing bearings a simple step by step procedure should be followed.
Use the following sequence to get the Articulation Index (AI) vs rotational speed: Perform waterfall analysis on your noise signal (+ tacho). This gives you a standard waterfall display On…
The P8000 Auto Range and the Auto Gain Range functions are often confused by users. They are not the same, but they are related. (more…)
The Prosig P8000 Auto-Zero function is a powerful tool and it is well worth spending some time understanding it. (more…)
I’m sure many users will have been in this situation. You need an analysis function, you know it’s in DATS, but you can’t remember where. One of the major strengths of the DATS package is the depth of analysis functions it provides. Unfortunately, when you have a deadline and can’t find the function that you want that isn’t much help. But assistance is at hand… (more…)
This article is the first in a series that will introduce two very important facilities that can be used when creating DATS worksheets – Named Elements and Global Variables. It is perfectly possible to perform simple measurement and analysis with DATS without knowingly using either of them. However, knowing how they work and what they can do, will lead to much more efficient and flexible worksheets. The first subject we’ll look at is Named Elements. (more…)
James Wren explains how to view 3-D visualizations using linear, logarithmic & dB scales. http://www.youtube.com/watch?v=mnfchJCO8-4
James Wren explains how 3-D graphs can be transposed using Prosig's DATS software. http://www.youtube.com/watch?v=FtUOThwuu1I
Here are two videos on a relatively simple, but sometimes misunderstood procedure – how to calibrate microphones & accelerometers (more…)
This is complete version of the video illustrating my recent article How To Measure Noise & Vibration In Rotating Machines. This video was previously published on the blog in 3 parts.…
http://www.youtube.com/watch?v=vZCKb4ikX1s This is the final part of our four part tutorial. This adds a report to the worksheet we developed in part 3.
http://www.youtube.com/watch?v=gvwwfCampas Today we have the third of our four part tutorial. Here we show how to quickly build a worksheet to analyze the data we captured in parts one and…
http://www.youtube.com/watch?v=4ejGBG5ImfY Part two of the four tutorials showing a simple setup to capture, analyze and produce a report using Prosig’s DATS software and P8000 hardware. This part deals with setting…
http://www.youtube.com/watch?v=dGRzTxzUWfE The first part of a series of four tutorials showing a simple setup to capture, analyze and produce a report using Prosig's DATS software and P8000 hardware. Part 2…