Sensor placement of flywheel under diagnostic criteria and cost estimation

The sensor placement method of flywheel and cost estimation criteria were proposed. The relationship between the function modular and the fault types of the flywheel system was analyzed in order to build the qualitative fault transmit model. The transmit model of the flywheel based on directed graph (DG) was presented. Firstly, control circle in the DG was operated. After that, roots satisfied the detectability and isolability criteria were generated in order to set up the bipartite graph. Then, greedy algorithm was used to resolve the key sensor selecting problem. Finally, considering the volume, the weight, the power consumption, and the processing capacity, resource occupation degree (ROD) was proposed to describe the cost. The ROD easily expresses the importance of certain resources, can avoid the weakness of certain resources, and also is easy to expand. The final sensor placement result was estimated by the ROD.