【作者】 杨林；

【导师】 彭宇；

【作者基本信息】 哈尔滨工业大学 ， 仪器科学与技术， 2010， 硕士

【摘要】 随着导弹功能日益复杂,对其可靠性提出了更为苛刻的要求,弹上电气系统作为导弹重要组成部分,对其可靠性和可诊断性要求也不断提升。然而,目前常见的故障诊断方法研究面临着两个严峻的挑战：故障样本缺乏和方法评估验证问题。针对此问题,本文研究导弹电气系统故障仿真和采集一体化平台设计方法,通过电路系统模拟方法获取故障样本,从而为故障模拟、样本生成、采集和算法评估提供必要的技术手段。论文首先以某型号导弹电气系统作为诊断对象,通过分析弹上电路实际特点,提出了导弹电气系统故障诊断平台总体框架,并综合利用嵌入式、高速数据采集、直接数字合成、虚拟仪器等技术实现该平台软硬件设计。该平台采用ARM嵌入式处理器S3C4510B作为主控制器,实现对平台内所有模块的控制,并利用LAN接口实现与诊断主控计算机之间的数据交互；另外,该平台中故障激励和仿真模块能够通过程控的方式,模拟被诊断电路所需的脉冲、正弦、方波等各种激励信号,激励电路工作；同时故障样本采集模块使用多通道并行采集电路响应信号,从而获得故障样本,解决电路故障诊断算法故障样本缺乏的问题。最后,论文给出了系统调试结果,并以弹上电源电路作为诊断对象,验证了该硬件系统的实际故障诊断能力。实验结果表明,本文提出的导弹电气系统故障仿真和样本采集平台,为故障诊断算法提供了来自于实际电路的真实故障特征数据,能够用于解决某型号导弹电气系统故障诊断问题。本系统设计合理,运行可靠,使用的故障样本获取方法可以用于解决其它故障诊断需求。更多还原

【Abstract】 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.更多还原