引信安全逻辑控制电路优化设计

【作者】 王成；

【导师】 聂伟荣；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2009， 硕士

【摘要】 本文主要进行引信安全逻辑控制电路优化设计,采用了一种通用双微控制器引信电路设计理念,按照GJB373A-1997《引信安全性设计准则》,针对某一弹种,分析其弹道上多种可用环境信息,使用相关传感器对可用信号进行采集输出,并进行信号识别算法分析,从而确定一种可以在硬件电路上实现的信号识别算法,分别采用CPLD硬件微处理器VHDL编程语言和ARM软件安全控制处理器C语言进行编程,来实现引信双环境保险逻辑电路设计。本文电路系统是基于微旋迫弹、选取后坐加速度环境信息和发射出炮口磁环境信息作为双环境保险信息、运用双微控制器电路来实现引信安全系统功能。通过分开放置电压和滤波芯片,按照电路信号流向来布局器件,将晶振芯片与易产生干扰的芯片分开,从而可以解决电路板的电磁兼容性问题。在保证信号传输质量的基础上,对安装到弹体上的电路板进行功能优化和设计小型化,最后,PCB板平面面积由初期的32cm~2简化为23.4cm~2,并且宽度由40mm简化到30mm,也就可以在一些较小弹径迫弹上应用该系统。本文算法是运用“双阈值+顺序+时间窗+脉冲计数”识别后坐加速度环境信息,运用跳变信号触发算法识别出炮口磁环境信息。在VHDL编程中主要使用占用资源较小的“Process进程+if语句”语句描述CPLD内部程序,从而可以选用EPM7064S芯片代替初期的EPM7128A。ARM7微处理器作为引信安全系统的软件安全控制器,在实现信号识别软件算法的同时,增加了与CPLD数据通信模块、上位机串口调试显示模块和数字滤波等功能。最后,对本文设计的硬件电路器件进行功能调试和试验分析研究,并进行整个电路系统可行性分析和可靠性试验研究,从而保证整个电路系统的可行性、安全性和可靠性。更多还原

【Abstract】 The Safety Logic Control Circuit Fuze System is optimized. The System is adopted a universal kind of Fuze Design of Double-Microprocessor universal Design. The system is based on the standards of fuze safety design. The system can analyze some kinds of signals on trajectory, and utilize corresponding sensors to collect these signals. The system seeks for some algorithms of environment information identify which can be performed on hardware. The system adopts the priority controller of CPLD and safety controller of ARM separately to make double-circumstance insurance come true.The System is based on Micro-rotating mortar projectile. The system Chooses the accelerate signal of recoil force and the geomagnetic signal of muzzle as arming the two signals of circumstance. In order to improve safety the state is controlled by two microprocessors. The PCB design of the fuze system places voltage components and filters dividedly. The system places these components on the way of signal, makes crystal oscillator and the components which can bring disturb. Then the system analyses environment signal information and electromagnetic compatibility to improve the quality of PCB. Finally the PCB can be optimized. The area of PCB is optimized from 32cm~2 to 23.4cm~2, and width from 40mm to 30mm. Then the PCB can be applied into smaller mortar projectile.The algorithm program of the system is the double-threshold, sequence, timing, the number of impulse counting, which is identified the accelerate signal of recoil force. Using the algorithm program of level jump, the system can also identify the geomagnetic signal of muzzle. The design uses the configuration of Process and if which can use less inner hardware recourse. The microprocessor describes the program of CPLD. Then the system can Chose EPM7064 instead EPM7128. Based on the security and feasibility, the system can decrease the resource and area. With the assistants of ARM7, the system is compatible with CPLD, and using UART to communicate with PC, thus digital filtering and so on.Finally, in order to improve the security, feasibility, reliability of Fuze System, Carrying out feasibility analysis and reliability experiment is necessary.更多还原