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Energy efficiencies of different hybrid systems are investigated in an urban bus cycle. A diesel bus is converted into a multihybrid bus also capable of operating in a direct diesel drive. The target is to investigate which kind of a hybrid system provides the lowest fuel consumption in different operating conditions.
A motor power feeder cable can be used for power supply and to transmit the speed information of the motor to the controller by applying a power line communication method. The method produces latency to the feedback loop and hence, decreases the performance of the system. A disturbance observer is implemented in a control loop to increase the system stiffness to load disturbances.
Applications, which need both efficient tracking and good load disturbance regulation, are traditionally controlled with controllers having two-degrees of freedom. However, such a controller compromises over the performance between the tracking and the regulation. To improve the performance, different controllers should be used. Transfer between controllers is, however, problematic. In this study...
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