西德汉堡和不来梅的Messer-Schmitt-Bolkow-Blohm (MBB)公司研制的光电控制系统(LECOS)是一种用不同波长的光和光纤把飞行控制板发出的控制指令传送到飞机控制机翼(见图,略)。这种系统的基本要求是失效率低、安全度高。本系统的设计特点是,即使一条光路或整个网络发生故障,信号仍可通过另一条光路传送。任一项指令都由不同波长的三种光束携带,这三种光束同时被馈入光纤网络。散射进光纤的外来光只有具有以下两个条件才会影响系统的功能:①其波长正好等同于三种载波的波长;②具有相同的脉码目标地址。光路本身不 The photoelectric control system (LECOS) developed by the Messer-Schmitt-Bolkow-Blohm (MBB) company in Hamburg, Germany, and Bremen, is a control system that sends control commands from the flight control board to the aircraft control wing using different wavelengths of light and fiber See figure, omitted). The basic requirement of such a system is low failure rate and high safety. The system’s design features that even if one optical path or the entire network fails, the signal can still be transmitted through another optical path. Either instruction is carried by three beams of different wavelengths, which are simultaneously fed into the fiber network. External light scattered into the fiber can affect the function of the system only if it has the following two conditions: (1) its wavelength is exactly equal to the wavelength of the three carriers; (2) it has the same pulse code destination address. Light itself is not