Abstract:In order to solve a helicopter rotor servo actuator maintenance support during limited training resources, disassembly difficult, high failure rate and it is difficult to determine the point of failure and other problems, the helicopter virtual maintenance training system (VMTS, Virtual Maintenance Training System) is presented on the basis of the proposed application of virtual instrument, to determine the point of fault by visual design. Analysis of the fault diagnostic process instruments, tools, environmental impact on fault diagnosis to achieve a dynamic simulation model and data processing. Through the virtual instrument and reasoning machine functions to solve the helicopter maintenance, troubleshooting complex problems into a logical reasoning ability of fault diagnosis system. Finally, a helicopter rotor servo actuator fault diagnosis, for example, to verify the feasibility of the method.