TwoStatePowerDrawAppliance.java

/*******************************************************************************
 * This file is part of the Appliance Energy Detector, a free household appliance energy disaggregation intelligence engine and webapp.
 * 
 * Copyright (C) 2011,2012 Taylor Raack <traack@raack.info>
 * 
 * The Appliance Energy Detector is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * The Appliance Energy Detector 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with the Appliance Energy Detector.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * According to sec. 7 of the GNU Affero General Public License, version 3, the terms of the AGPL are supplemented with the following terms:
 * 
 * If you modify this Program, or any covered work, by linking or combining it with any of the following programs (or modified versions of those libraries), containing parts covered by the terms of those libraries licenses, the licensors of this Program grant you additional permission to convey the resulting work:
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 ******************************************************************************/
package info.raack.appliancedetection.evaluation.model.appliance;

public abstract class TwoStatePowerDrawAppliance extends SimulatedAppliance {
	protected int minPowerDraw;
	protected int maxPowerDraw;
	protected int cycleTime;
	
	private boolean lastHigh = true;
	
	protected double highFraction;

	protected abstract double getHighFraction(int totalSeconds);
	
	protected int powerDrawAtOnCycleTimestep(int totalSeconds, int secondIndex, int globalTimestep) {
		// if we're just starting a cycle, pick a new high percentage to simulate different power levels during operation
		if(secondIndex == 0) {
			highFraction = getHighFraction(totalSeconds);
			lastHigh = true;
		}
		
		// high fraction is a fraction of every cycleTime seconds
		while(secondIndex >= cycleTime) {
			secondIndex -= cycleTime;
		}
		if(secondIndex > ((float)cycleTime * highFraction)) {
			// in low state
			if(lastHigh) {
				addStateTransition(globalTimestep, false);
			}
			lastHigh = false;
			return minPowerDraw;
		} else {
			// in cooking state
			if(!lastHigh) {
				addStateTransition(globalTimestep, true);
			}
			lastHigh = true;
			return maxPowerDraw;
		}
	}

}