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description Documentation for the OpenRocket Software-in-the-loop extension

Software-in-the-loop

Overview

The OpenRocket extension is meant to provide the simulation environment for your flight software. While OpenRocket provides several useful events and values, this extension makes use of the following simple outputs:

  • acceleration

(near-future)

  • velocity
  • world coordinates
  • rotational coordinates

These values are provided over a serial port (virtual ports included). Commands can be sent back to the simulation to carry out events (chute deployment, airbrake deployment, fin movement). As a result, your flight software controls the actuation of the rocket in the OpenRocket simulation, leading to software-in-the-loop testing.

Usage

Coming soon!

Development

Working with socat

  1. Install
sudo apt install socat
  1. Start virtual ports
sudo socat PTY,link=/dev/ttyUSB98 PTY,link=/dev/ttyUSB99
  1. Elevate user privilege to operate ports
sudo chmod a+rw /dev/ttyUSB98 && sudo chmod a+rw /dev/ttyUSB99

Compilation and Usage

  1. Change directory to orksim
cd ork-extension
  1. Compile program
ant
  1. Copy the .jar file to OpenRocket plug-in
cp ./haloship.jar ~/.openrocket/Plugins/haloship.jar