pydvma 0.8.2

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# pydvma

A Python package for dynamics and vibration measurements and analysis.

## About pydvma

This is a modular library for data-measurement and analysis in the context of dynamics and vibration, for use in student laboratory experiments as well as for research projects, developed at Cambridge University Engineering Department.

A high-level interface allows straightforward application for common use-cases and a low-level interface provides more control when needed.

The aim is for a library that is simple to use and simple to maintain. It is not a full-featured GUI, but when used in conjunction with Jupyter Notebooks it is intended to provide the best of both worlds: interactive tools for common tasks and command line interface for customisation.

## Getting started

### Installation

The logger requires Python 3.7 or above to work with soundcard acquisition.

On Windows:

` conda install pyaudio pip install pydvma `

Or clone this repository and install using: ` python setup.py install `

On Mac OS X: install PortAudio. If you use Homebrew, just run this: `shell $ brew install portaudio ` On Linux: TBC

Alternatively you can use the environment yml file provided: ` conda env create -f logger_env.yml activate logger `

### Running the logger

To get started, open the file: ` pydvma_template.ipynb `

or within a Jupyter Notebook or Python console: `python %gui qt import pydvma as dvma settings = dvma.MySettings() osc = dvma.Oscilloscope(settings) logger = dvma.Logger(settings) `

## Roadmap

At present the library has basic functionality for:

• logging data using soundcards or National Instrument DAQs (requires NiDAQmx to be installed from NI, windows only)

• logging with pre-trigger for impulse response measurements

• logging with pc generated output (soundcard and NIDAQ)

• computing frequency domain data

• computing transfer function data

• computing sonograms/spectrograms

• basic modal analysis tools (mode-fitting)

• saving and plotting data

• export to Matlab

• interactive tools for standard acquisition and analysis

• oscilloscope view of input signals

The plan is to include the following functionality:

• wider support for import/export

• more advanced modal analysis tools (e.g. global fitting)

• extend the range of hardware that can be accessed from this library

## Contributer guidelines

Contributions to this project are welcomed, keeping in mind the project aims above:

• If you find a bug, please report using GitHub’s issue tracker

• For bug-fixes and refinements: please feel free to clone the repository, make edits and create a pull request with a clear description of changes made.

• If you would like to make a more significant contribution or change, then please be in contact to outline your suggestion.

Please see the documentation for details of the code structure and templates for anticipated applications.