摘要
本文对于给定的非线性系统，通过对所给数据与条件的处理和分析，建立了输出ｙ关于输入频率ｆ１、ｆ２、ｆ３的数学模型。其次，根据模型中可能出现的交调频率的情况及系统的条件，自编程序并上机操作得出了符合全部要求的两组输入频率（３６，４２，５５）和（３６，４９，５５）。最后还对得出的数学模型进行了讨论和推广。
In this article. the mathematical model of the output frequencies f1,f2,f3 of output yis established to the given non-linear system through solving and analysing the given data and conditions. Then, according to the probable situation of intermodulation frequencies and the conditions of the system, the authors themselves programed and operated on the computer and have obtained two groups of input frequencies(36, 42,55)(36, 49, 55), which tally with all requirements. At last, the mathematical model obtained is discussed and popularized.
关键词
频率
交调
数学模型
非线性交调
frequency
intermodulation
mathematical model
