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This project aims to study the performance of a public transportation diesel bus when it's converted in a hybrid model. The analysis was made considering a usual ride cycle around the city extracting the data from the Garmin 735 XT model to obtain both speed and time data.
Trip Analysis
Trip Analysis
The trip considered for analysis is the one shown in the picture. As it can be seen from the scheme, there are many stops in the way which implies regenrative braking that will be considered in the hybrid model.
The data extracted from the Garmin is shown below.
Data Filtering
Data Filtering
In order to design an accurate model for the hybrid bus, the data from the Garimn had to be filtered since there were a lot of peaks and discontinuities that altered the real data. The filtering process is shown in the figures.
Two filters were made to analyze the data and extract valuable information from the trip:
Peak elimination: Due to connectivity and bus movement some of the speeds in the graph showed accelerations larger than expected. This peaks were eliminated if they were isolated or smothen if the bus was on movement.
Profile smothen: Besides the larger peaks, the Garmin precision when looked up closely showed oscillations within the profile. This was reduced by making an average of the closer points so there were no discontinuities.
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