Performance measurements of energy storage systems and control strategies in real-world e-bikes

The paper presents a measurement campaign (electrical, thermal and user comfort) for the performance characterization of energy storage systems in real-world electric bicycles. Specific sensors were added to characterize three vehicles which differ for electric motor, energy storage system size and control strategies. The controller can implement energy recovery strategies when braking and change the level of electric assistance depending on the desired trade-off between the comfort of the driver and the battery duration. Experimental results show that a control strategy aiming at preserving the SOC (State-Of-Charge), together with regenerative braking, can ensure very long battery duration with no need of recharge. The SOC is kept at about 50% for a long period. Instead, control strategies optimizing the full comfort of the driver by maximizing the level of assistance can ensure real-world e-bicycle missions of about 2 h and 40 km, when the SOC of the battery drops down from 95% to 5%

Design Of Building Gear Motion Control Systems On Bicycles Using Voice Comments

Voice recognition is also connected to the microcontroller connected to the servo motor to move the derailleur rear as a gear drive. The results of research on the gear motion control system on bicycles using voice comments can move in the correct gear position. Storage of voice commands is done 7 times and repetition of the same command no later than 4 times while the fastest 2 times repetition. Test results in a crowded condition obtained 72% success and an average delay of 1.38 seconds and the test results in a quiet state obtained the success of 88% and an average delay of 1.20 seconds. The results of this study indicate that this study is able to move the gear in a moving state with voice commands in a quiet state, the maximum level of voice commands is 96.1 dB and the minimum level of voice commands is 80.2 dB when crowded, the maximum level of voice commands is 101.9 dB and obtained the minimum level of voice commands is 88.1 dB, but this research still has shortcomings, namely if the voice command given is above the maximum voice command level and below the minimum level, the voice command cannot be processed and the gear cannot move. seen from the difference between the maximum crowded state and the maximum quiet state of 5.8 dB and the difference between the minimum crowded state and the minimum quiet state of 7.9 dB