信号仿真系统离散信号发送功能研究

离散量信号是民用飞机地面模拟试验中不可缺少的信号之一。基于某型号飞机地面模拟试验的需求,提出了简单可靠的离散信号电路设计方案,利用CMOS管和光电耦合器作为输入输出隔离器件,将TTL电平转换成离散量信号。采用电路仿真软件Multisim进行仿真分析,并结合某型号铁鸟试验验证。仿真分析及试验结果表明,该电路满足某型号飞机地面模拟试验对离散量信号的要求。

Research of Discrete Signal Sending in the Signal Simulation System

Discrete signal is one of the most essential signals in ground simulation test for civil aircraft. Based on the test requirements of some civil aircraft, this paper put forward a simple and high reliable discrete signal output circuit design . The design transformed TTL signal into discrete signal by using CMOS and photoelectric coupler as isolation. The circuit simulation software Multisim was adopted to analyze the function of discrete signal output circuit. Experimental verification was done in iron bird of some civil aircraft. The results of simulation and test show that the discrete signal output circuit meets the practical requirements.