面向混联机床传感器故障的容错纠错方法研究  

A Fault Tolerance and Fault Rectification Approach to Sensor Faults of Hybrid Machine Tools

作　　者：李登静[1] 范守文[1] 

机构地区：[1]电子科技大学机械电子工程学院,成都610054

出　　处：《机械科学与技术》2009年第12期1634-1638,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50775027)资助

摘　　要：针对混联机床可能出现的传感器故障提出了一种容错纠错方法,该方法通过在混联机床的中间从动腿上安装冗余传感器,实现了对混联机床周围三条驱动腿传感器故障的容错纠错功能。如果周围三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,由其它正常工作的传感器和冗余传感器的测量值计算出故障传感器的应测值,文中导出了对应的位移传感器和速度传感器故障的容错重构算法。通过模拟渐变型和突变型的传感器故障,对文中提出的容错纠错方法的容错纠错性能进行了仿真研究。A fault tolerance and fault rectification approach to sensor faults of hybrid machine tools（HMTs） is presented in this paper, and function of fault tolerance and fault rectification for three driving legs is realized by mounting redundant sensors in the middle passive leg. If fault occurs in one of the three driving legs＇ sensors, the real value of fault sensor can be computed by the detected value of the other two driving legs＇ sensors and the redundant sensor utilizing spatial dosed chain constrain relationship. Corresponding algorithms of fault tolerance reeonfiguration for displacement sensors and velocity sensors are deduced. Simulations for fault tolerance and fault rectification performance of the above approach are conducted by emulation of a gradual type sensor fault and an abrupt type sensor fault. Simulation results show that the fault tolerance and fault rectification approach proposed in this paper can guarantee the reliability and safety of HMTs system effectively.

关 键 词：混联机床 容错 纠错 重构 可靠性 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]