基于高G微加速度计的自适应钻地引信系统研究

【作者】 邓琼；

【导师】 刘晓明；

【作者基本信息】 电子科技大学 ， 精密仪器及机械， 2006， 硕士

【摘要】 引信系统是钻地武器的重要组成部分。当今钻地武器快速发展,对引信系统设计提出更高要求。随着MEMS技术和集成电路技术的飞速发展,引信系统已朝着集成化,多功能化,实时性,可靠性的方向发展。引信用加速度计直接影响引信系统精度;而加速度信号调理和先进的引信算法设计保证引信系统实时可靠地工作。本文在钻地引信用高G阵列式微加速度计的成功研制基础上,首先对加速度计试验信号进行特征分析,为传感器应用提供理论依据。重点研究了加速度计信号调理和信号处理方案,并设计一种新型引信算法。本着实时性,可靠性,体积、功耗均小的要求,利用先进的集成电路器件和灵活的集成电路设计方法对整个硬件系统进行研究实现。论文主要工作如下:1.根据微加速度计结构特点和MEMS加工工艺,对其在高G冲击试验下的试验结果进行分析,得出冲击信号特征,为传感器的结构改进和应用提供理论依据。2.通过钻地武器侵彻过程分析,对现今国内外的较先进的“侵深计算”同“目标介质识别”两种算法进行融合改进,设计一种多功能自适应引信算法,以提高引信系统性能。3.前端模拟通道设计,采用集成电路芯片,对信号调理模块、数据采集和外围电路进行设计,完成相关硬件PCB版图绘制。4.多路信号采集的控制、加速度信号数字滤波和逻辑运算等单元模块采用可编程逻辑器件FPGA技术设计和仿真。数据采集采用多通道同时采样,分时转换的方式;由FPGA控制其读写转换,通道写入等;数字滤波器选择分布式算法实现。5.本文最后给出了多用途自适应引信硬件实现方案,利用FPGA自带的IP核和DSP模块设计。整套系统的控制和运算单元均由FPGA完成,大大提高了系统的工作频率,增强了系统实时性,此外减少了外围电路,使得系统体积以及功耗尽量减少。更多还原

【Abstract】 Fuze system is very important part in Earth Penetrating Weapon. With Earth Penetrating Weapon developing quickly recently, it’s urgent to advance the fuze system designing. Nowadays, fuze system has been developing at aim of integration, multifunction, real-time and reliability as MEMS technology and Integrated circuit technology progress. The accelerometer used by fuze affects the precision of fuze system directly; the accelerometer signal modulation and the design of advanced fuze algorithm ensure the fuze system could work reliably and in time.After the high-G arrayed Micro-Accelerometer was designed and fabricated successfully, this paper analyzed the characteristic signal of accelerometer in order to supply the theory sustain for the application of sensor. The objective of this study was to contrive a scheme of accelerometer signal modulation and signal process, and to carry out a new fuze algorithm. This paper completed the design by the advanced integrated circuit device and flexible integrated circuit design method which contributed to the real-time and multifunction of fuze system. The paper is organized into the following sections:1. According to the structural characteristic of accelerometer and the process technics, we got the characteristic of impact signal by analyzing the high-G-impact experiment results, and supplied the theory sustainment for improving of accelerometer structure and application.2. After analyzing the penetrating process of Earth Penetrating Weapon, we described a new multifunctional adaptive fuze algorithm in order to improve the performance of fuze system, by combining the“calculating of penetration depth”and“target medium identification”which were the more advanced fuse algorithms.3. In the face of analog channels design, we took use of the IC chip to design the signal modulation module, data acquisition and peripheral circuits.4. Controlling the multi-channels of the data acquisition, digital filtering for the acceleration signal and logic operation were designed and simulated by FPGA, and data acquisition was carried out by multi-channel synchronous sampling and time-sharing更多还原