## Strain Gauge Basics – Part 2 – Shunt Calibration

As mentioned in the previous post, in order to relate the measured voltage difference across the bridge circuit to a strain measurement, we need a way of calibrating the system. In most systems, including the Prosig acquisition systems, this is done by including a high-precision shunt resistor across one of the legs in the bridge. For example, the following diagram shows a quarter-bridge circuit with a shunt calibration resistor, RS, across the bridge completion resistor R2.

## Bearing & Gearbox Vibration Analysis Using Demodulation Techniques (Part 1)

Bearings and gearbox vibration are fundamental issues for rotating machines in many industrial applications. These are critical components; any failure can prove expensive in repair costs and downtime. Because of…

## Strain Gauge Basics – Part 1

The use of strain gauges with Prosig’s data acquisition systems is well understood and has been used in many real-world applications over the years [see What Is A Strain Gauge?…

## Data Smoothing : RC Filtering And Exponential Averaging

What are RC Filtering and Exponential Averaging and how do they differ? The answer to the second part of the question is that they are the same process! If one…

## What Are dB, Noise Floor & Dynamic Range?

We are often asked what noise floor & dynamic range actually are. Most engineers are probably familiar with or have come across the decibel or dB as a unit of…

## Rotating Machinery Vibration Analysis: Keeping Your Machines Humming Along

[An Introduction To Vibration Analysis – Part 5] Welcome to Part 5 of our ongoing introduction to the world of vibration and acoustic measurement and analysis. Here, we look specifically…

## Vibration Control and Isolation: A Comprehensive Guide for Engineers

[An Introduction To Vibration Analysis – Part 4] Welcome to the fourth part of our ongoing introduction to the world of vibration and acoustic measurement and analysis. In this post,…

## Modal Analysis in the Real World

[An Introduction To Vibration Analysis - Part 3] Modal analysis is one of the most widely adopted vibration measurement techniques for studying the dynamic behaviour of structures and mechanical components.…

## Vibration Measurement Techniques: A Comprehensive Guide

[An Introduction To Vibration Analysis - Part 2] Introduction This post on vibration measurement techniques is the second in our series, introducing vibration analysis. Future posts will continue the exploration…

## Basics of Vibration Analysis: A Technical Dive

[An Introduction To Vibration Analysis - Part 1] Introduction For professionals delving into the worlds of automotive, aerospace, or industrial engineering, vibrations are not just mere oscillations; they're a symphony…

## How To Analyze Noise & Vibration In Rotating Machines

This article will look at the basic steps needed to measure noise & vibration in rotating machines. We won’t look in great detail at some of the techniques involved – we deal with these elsewhere on the blog. This material is suitable for a newcomer to the field who understands the basic concepts of noise & vibration analysis but has not dealt with rotating machinery before.

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## Measure Vibration – Should we use Acceleration, Velocity or Displacement?

When using vibration data, especially in conjunction with modelling systems, the measured data is often needed as an acceleration, as a velocity and as a displacement. Sometimes different analysis groups require the measured signals in a different form. Clearly, it is impractical to measure all three at once even if we could. Physically it is nigh on impossible to put three different types of transducer in the same place.

## Impact Hammer Double Hit – An Investigation

An Impact Hammer double hit is viewed as a common problem, and most hammer impact testing software offers a "Double hit" rejection function. Signals captured with double impacts are not…

## A Guide To Resonance

Welcome to our latest blog post, where we delve into the fascinating world of resonance and natural frequency! Over the years, we've consistently noticed that our articles exploring these topics…

## Tools for motorcycle dynamics analysis

Tools for motorcycle dynamics analysis - Prosig DATS and Structural Animation Viewer Mechanical engineering covers a vast field of topics, but not many fields feature higher dynamics in time and…

## Some Basic Vibration Signal Qualities

This article discusses quantifying basic vibration signals from three aspects: signal type, signal level, and signal display format. Mathematical expressions and typical applications are also introduced. A simple harmonic vibration…

Fig1: Basic Workflow

## Automated data capture, analysis and reporting

This post deals with automated data capture and analysis of data. It uses Prosig's DATS software and the worksheet environment it provides. The technique could be duplicated in other software…

## Are My Hammer Impact Results Valid? (3) Time Invariance

As mentioned in our previous two articles, when performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the…

## Are My Hammer Impact Results Valid? (2) Reciprocity

As mentioned in our previous article, when performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the validity…

## Are My Hammer Impact Results Valid? (1) Linearity

When performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the validity of any results. A modal analysis…

## Hammer Testing: Free or fixed support?

A vital question to be asked before performing hammer testing is - how do I support the testing object? What fixing mechanism to use? Or technically, what are the desired…

## Rotational Analysis with no Tachometer Data

The identification of cyclic events in rotational analysis is often key to identifying problems. It is good practice to use a suitable sensor for capturing rotational speed. However, this is…

titanium and steel gears and cogwheels

## Analysis of Dynamic Engine Vibration – Angular Vibration in High Performance Engines

The analysis of dynamic engine vibration and the accurate measurement of angular vibration is a non-trivial task, as a more in-depth analysis of boundary conditions reveals. Tools for engine vibration…

Tire background texture

## Using Source Contribution Analysis to analyze complex structural dynamics issues

Using Source Contribution Analysis (SCA) and Structural Animation (STA) in the DATS software for the analysis of complex structural dynamics This post uses Source Contribution Analysis (SCA) techniques and a…

Vehicle AC

## Analysis of Airflow Instabilities in HVAC units

HVAC (Heat Ventilation Air Conditioning) units are devices used in various applications, such as cars, buildings, aircraft etc. They facilitate the transport and conditioning (heating, cooling, changing of humidity) of…