Design Of Missile Electrical System Integration Platform For Fault Imulation And Acquisition

In nowdays, the function of the missile has become increasingly complex, which in turn makes requirement for reliability more rigid. As an important part of missile, reliability and diagnosis ability for electrical system on missile is also becoming higher. However, the common method for diagnosis is facing two serious challenges:the lack of fault samples and the evaluation of diagnosis methods. Due to these reasons, it is difficult to bring a good theory into practical applications. In order to solve this problem, this paper focuses on the simulation of missile electrical system faults, as well as the design of an integrated platform. By means of simulating the electrical systems, we deduced the faults occurred in the systems, which is very close to the real situation, and therefore provides the necessary technical strategy when facing these problems, concluding the samples, and evaluating the algorithm.This paper firstly applies a missile electrical system as the diagnosis object. By analyzing the practical characteristic of this circuit, the whole framework of a fault diagnosis platform of missile electrical system is put forward. Then, we utilize the technology of embedded system, high-speed data acquisition system, and direct digital synthesis, and virtual instrument, to implement the overall design of this system. The platform use a embedded processors S3C4510B as the main controller to realize the control of all modules within the platform, and use the LAN interface to transfer data between the host computer and the platform. In addition,The fault excitation and simulation module in the platform can be programmed to excite DC, pulse, sine, square wave signal to excite the tested circuit.At the same time, the fault sampling module uses multi-channel parallel acquisition circuit to acquire the response signal, thus obtain the messages of fault samples, solving the lack of fault samples. Finally, the paper gives the conculsion of system debugging, and diagnose the power circuit on missile by platform proposed in this paper, so that the diagnosis ability of the platform can be verified.Through experimental results, a conclusion can be made that the platform we presented in this paper, provides the real fault message of the experimental circuit for fault diagnosis algorithm. This algorithm can be used to solve problems in missile electrical system fault detection. The system is reasonable and reliable, and the method to acquire fault samples method can be widely promoted.