This program allows you to see the root locus of any given transfer function and to add a regulator. You can quickly modify the value of ‘k’ and see if the system with that gain would be stable or unstable. You can also see the positions of the poles for that gain.

It has been created using HP-GCC 2.0, so it can only run on an hp 50g (and maybe hp 49g+). It isn’t needed to install ARM ToolBox in your calculator, though, the program comes in a way it will run without using it.

It has been hosted since 2012 here: https://www.hpcalc.org/details/7354

My website: www.skylyrac.net

IMPORTANT NOTE: This program was created with HP-GCC. That means that if it crashes there is no way to return to the HP menu by software means. In case that happens, just press the reset button (or remove a battery and put it back again after a second). This program has been tested a lot, it shouldn’t crash, but better safe than sorry. You may even lose the contents of the non-flash memory (ports HOME, 0 and 1). You should do backups of your files just in case.

Root Locus 0.3, Copyright (C) 2011-2012 Antonio Niño Díaz

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.