lang="en-US"UTF-8 Prosig Support Blog - Page 7 of 11 - The place to come for support for Prosig's DATS, P8000 & PROTOR products class="home blog paged custom-background paged-7 custom-background-image group-blog blogolife-3_0_7 unknown"

Prosig Support Blog

The place to come for support for Prosig's DATS, P8000 & PROTOR products

Prosig Support Blog
2977class="post-2977 post type-post status-publish format-standard hentry category-tutorial tag-amplitude tag-bushes tag-damper tag-dampers tag-low-frequency tag-low-speed tag-primary-ride tag-rebound tag-road-surface tag-secondary-ride tag-suspension-movement"

What is primary and secondary ride?

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In automotive NVH circles, ride behaviour is often referred to as primary and secondary ride, but what do these terms really mean. Continue reading What is primary and secondary ride?

James WrenAdd a Comment2974class="post-2974 post type-post status-publish format-standard hentry category-p8000 tag-basic-circuit-theory tag-cable-length tag-cable-type tag-electrical-conductor tag-frequency-bandwidth tag-high-frequencies tag-p8000 tag-phenomena tag-prosig tag-rf tag-wavelength"

Should I use 50 Ohm or 75 Ohm cables with a Prosig P8000 system?

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BNC CableUsing 50Ω or 75Ω cable will not have any negative effects on the P8000 at all. (Generally speaking, only large voltages will damage the P8000). The impedance of the cable can only ever effect the signal the cable is carrying. Continue reading Should I use 50 Ohm or 75 Ohm cables with a Prosig P8000 system?

James WrenAdd a Comment2960class="post-2960 post type-post status-publish format-standard hentry category-p8000 category-signal-processing tag-can-bus tag-drive-shaft tag-ecu tag-rpm tag-sensor-signal tag-signal-processing tag-signals tag-tacho tag-tacho-signal tag-tachometer"

There are tachometer signals available on the vehicle CAN-bus. Can I use these signals instead of connecting my own tachometer signal?

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A simple question should have a simple answer and that answer is “No”.

As usual, however, life is never that simple. Continue reading There are tachometer signals available on the vehicle CAN-bus. Can I use these signals instead of connecting my own tachometer signal?

James WrenAdd a Comment2763class="post-2763 post type-post status-publish format-standard hentry category-dats category-tutorial tag-accelerometer tag-accelerometers tag-dats tag-example-worksheet tag-resultant tag-time-histories tag-time-history tag-triaxial tag-waterfall tag-waterfalls"

How Do I Get An XYZ Resultant Waterfall

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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. Continue reading How Do I Get An XYZ Resultant Waterfall

Dr Mike DoneganAdd a Comment2898class="post-2898 post type-post status-publish format-standard hentry category-dats category-signal-processing category-tutorial tag-accelerometer tag-accelerometers tag-engine-noise tag-microphone tag-vibration tag-wheel-hub"

What is Source Contribution Analysis (or SCA)?

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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? Continue reading What is Source Contribution Analysis (or SCA)?

James WrenAdd a Comment2909class="post-2909 post type-post status-publish format-standard hentry category-dats category-signal-processing category-tutorial tag-acceleration tag-animation-software tag-frf tag-modal-analysis-software tag-natural-frequencies tag-operating-deflection-shapes tag-prosig tag-spectra tag-vibration tag-wire-frame-model"

What is the difference between Operating Deflection Shapes (ODS) and Operational Modal Analysis (OMA)?

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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. Continue reading What is the difference between Operating Deflection Shapes (ODS) and Operational Modal Analysis (OMA)?

James WrenAdd a Comment2819class="post-2819 post type-post status-publish format-standard hentry category-dats category-tutorial tag-axes tag-axis tag-curve tag-curves tag-dats tag-scales"

How do I plot two curves with two different axes

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A user recently asked…

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?

Continue reading How do I plot two curves with two different axes

Dr Mike DoneganAdd a Comment2919class="post-2919 post type-post status-publish format-video hentry category-dats category-tutorial category-video tag-order-plot tag-order-trace tag-orders tag-tacho-signal tag-time-history tag-video tag-waterfall tag-waterfall-plots tag-youtube post_format-post-format-video"

[Video] Creating order & waterfall plots

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A step-by-step introduction to creating order and waterfall plots from a time history and a tacho signal.

James WrenAdd a Comment2901class="post-2901 post type-post status-publish format-standard hentry category-dats category-signal-processing category-tutorial tag-response-position tag-sca tag-source-contribution tag-tpa tag-transfer-path tag-vibration-mountings tag-vibration-mounts"

What is the difference between Transfer Path Analysis (TPA) and Source Contribution Analysis (SCA)?

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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. Continue reading What is the difference between Transfer Path Analysis (TPA) and Source Contribution Analysis (SCA)?

James WrenAdd a Comment2873class="post-2873 post type-post status-publish format-standard hentry category-dats category-tutorial tag-analysis tag-dats tag-exponentiation tag-expression tag-prosig tag-script-fragment tag-script-fragments tag-simple-arithmetic tag-square-root tag-squares tag-trigonometry tag-variables"

Using global variables, variable arithmetic & script fragments

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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. Continue reading Using global variables, variable arithmetic & script fragments

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