航空学报 > 2010, Vol. 31 Issue (11): 2245-2252

面向雷达天线平台的容错纠错策略及其FPGA实现

熊静琪, 范守文   

  1. 电子科技大学 机械电子工程学院
  • 收稿日期:2010-01-20 修回日期:2010-05-20 出版日期:2010-11-25 发布日期:2010-11-25
  • 通讯作者: 范守文

Strategy of Fault Tolerance and Fault Rectification for Radar Antenna Platforms and Its FPGA Implementation

Xiong Jingqi, Fan Shouwen   

  1. School of Mechatronics Engineering, University of Electronic Science and Technology of China
  • Received:2010-01-20 Revised:2010-05-20 Online:2010-11-25 Published:2010-11-25
  • Contact: Fan Shouwen

摘要: 针对雷达天线平台可能出现的传感器故障,提出了一种容错纠错策略。如果雷达天线平台周围的3条驱动腿中的某一个传感器发生故障,则可根据空间闭链机构约束,由其他正常工作驱动腿的传感器和中间从动腿的冗余传感器的测量值计算出故障传感器的应测值。推导了对应的位移传感器故障的容错重构算法,研究了基于现场可编程门阵列(FPGA)的上述容错策略的硬件实现方法。通过引入坐标旋转数字计算(CORDIC)算法使得FPGA运算中只需进行基本的移位和加/减操作;设计了基于FPGA的循环高速流水线处理器结构,使得重构算法的在线计算速度大大提高。仿真模拟了突变型传感器故障,结果表明,所提容错纠错方案能有效地保证雷达天线平台运行的安全性和可靠性。

关键词: 雷达天线平台, 容错, 纠错, 现场可编程门阵列, 重构

Abstract: A fault tolerance and fault rectification strategy for sensor faults of radar antenna platforms (RAPs) is presented. If fault occurs in one of the sensors of the three driving legs, the real value of the fault sensor can be computed by the detected value of the sensors of the other two driving legs and the passive leg redundant sensor, utilizing the spatial closed chain constraint relationship. Corresponding algorithms of fault tolerance reconfiguration for displacement sensors are derived. A hardware implementation approach for the strategy of fault tolerance and fault rectification is studied based on field programmable gate array (FPGA), which, by introducing the coordinate rotation digital computer (CORDIC) algorithm, only requires basic shifting and addition/subtraction operation in FPGA computing. High speed pipeline processor structure is designed for the algorithm, which greatly enhances the online computing speed of the reconfiguration algorithm. Simulation of the strategy is conducted by emulation of an abrupt type sensor fault. Simulation results show that the proposed strategy of fault tolerance and fault rectification can guarantee the reliability and safety of RAP system effectively.

Key words: radar antenna platform, fault tolerance, fault rectification, field programmable gate array, reconfiguration

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