low_pass.pde

Go to the documentation of this file.

/***********************************************************
 * StoRC - Search to Rescue Craft
 * MEAM Senior Design 2011-2012
 * 
 * Authors:  Michael Posner (CIS, MEAM '12)
 * Timothy Hennelly (ESE '12)
 * Jacob Orloff (MEAM '12)
 * 
 * (some code from ArduPilot Mega project, found here:
 * http://code.google.com/p/ardupilot-mega/ )
 * 
 * Licensing:
 * 
 * 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 <http://www.gnu.org/licenses/>.
 * 
 ***********************************************************/

/**
*  @file low_pass.pde
*  @brief Discrete-time implementation of a simple RC low-pass filter
*  @author Michael Posner (CIS, MEAM '12)
*  @author Timothy Hennelly (ESE '12)
*  @author Jacob Orloff (MEAM '12)
*  
*/



float low_pass(float raw_data, float alpha, float filtered_data){

  filtered_data = (raw_data * alpha) + (filtered_data * (1 - alpha));

  return (float)filtered_data;
}