Fault tolerant traction drive of electrical helicopter with battery electric energy storage

The paper presents the results of compliance assessment of the values of reliability and fault tolerance of the helicopter's electric traction based on the project requirements. As a comprehensive parameter for the assessment of fault tolerance of the components with a number of degradation states, it is proposed to use the parameter degree of fault tolerance. On the basis of such a criterion the transition probabilities for the Multi-State System reliability Markov Models have been computed. The simulation and assessment results allow a conclusion about the feasibility of the traction drive topology and its compliance with the design requirements on the reliability and the future operational conditions of electrical helicopters.