【作者】 白海滨；

【导师】 沈毅；

【作者基本信息】 哈尔滨工业大学 ， 控制科学与工程， 2007， 硕士

【摘要】 本论文研究了数字信号处理器(DSP)在弹载计算机系统中的应用,提出了一种基于DSP、现场可编程门阵列(FPGA)构建弹载计算机系统硬件平台的新方法。文中结合现代导航技术发展的特点和弹载计算机系统的实际需求,论述了原有模拟式自动驾驶仪的缺点和基于DSP设计弹载计算机系统的优点和发展前景,详细阐述了弹载计算机硬件设计和程序编写的主要设计思想,经过分析研究和选型,设计了弹载计算机系统的硬件电路,编写了系统软件。本系统设计采用DSP+FPGA结构方案,DSP主要负责制导控制运算,FPGA负责系统的输入输出控制,两者结合实现优势互补,充分发挥各自特长。另外,设计了丰富的通讯接口,包括4路RS-422接口、25路开关量I/O接口、MIL-STD-1553B接口,并编写了各个接口的底层驱动程序。在此基础上,编程实现了基于比例导引律的制导控制算法主程序。文中详细论述了各个部分的硬件电路和驱动程序的具体设计过程,并介绍了系统试验的过程,经过不断测试和改进,制作了工程样机,并结合惯性组件和检测计算机进行了试验,给出了试验结果分析。试验结果表明,基于DSP设计的弹载计算机,可以有效地提高制导控制系统的运算精度,减小系统的体积、功耗和成本,增加了系统扩展升级的灵活性,使系统具有更好的应用价值、市场前景和军事意义。更多还原

【Abstract】 This paper mainly discusses the application of digital signal processor (DSP) in projectile computer system of guided bomb. A new structure based on DSP and FPGA is put forward to design the hardware platform of the onboard computer system in this paper.Combining the characteristics of the modern navigation techniques and the requirement of navigation computer system, the advantages of the structure based on DSP is discussed comparing to last generation anolog autopilot system,and the detail information about hardware design and software programming of the projectile computer system development is described. The projectile computer system’s overall scheme and hardware circuit are designed after requirement analysis and chips selection, and the system software is also developed. The projectile computer structure is based on DSP and FPGA, where the former is used to execute control and guide algorithm, while the latter is to control the system I/O operation. In this way, the two processors can take full advantages of their own characteristic. NOR FLASH is used to implement bootloading of the system. The real time information collection and process subsystem is developed based on FPGA. Furthermore, many communicating interfaces are applied, including 4 channels RS-422 interface, 25 channels I/O interface, MIL-STD-1553B interface, and their corresponding driver program are also developed. The control and guide algorithm using proportional navigation rule is realized in this system. The developing process of hardware circuit and driver program of each function model is described in detail. The engineering machine is made after being tested and improved several times. Experiments are conducted, when linked with IMU and the test equipment, the results are given finally.The experiments results approve that the projectile computer system based on DSP can obviously improve the system operating precision, minish the system cubage, power and cost, increase the flexibility of extending and updating. It can make the projectile computer system more applicable, better future of market, and great military significance.更多还原