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信号传输理论应用于电路网络中,由基尔霍夫定律推导了离散的温度-时间信号传输模型.给出了一种基于电压和电流的迭代算法,分别实现了导线升温、降温过程的信号传输仿真分析.研究表明:测试信号幅值随温度升高而逐渐衰减,在300℃时,幅值衰减了10%左右,而在升、降温并存环境中幅值衰减更加明显.在此基础上,设计了温变环境下的振动测试试验,所得结果与仿真分析结果一致.该研究为提高振动测试信号的精度提供了一种新方法.
The theory of signal transmission is applied to the circuit network, and the discrete temperature-time signal transmission model is derived from Kirchhoff’s law. An iterative algorithm based on voltage and current is given, which respectively realizes the signal transmission in the process of temperature rise and temperature drop Simulation results show that the amplitude of the test signal decays gradually with increasing temperature, the amplitude decays by about 10% at 300 ℃, and the decay of the amplitude declines even more under the coexistence of heating and cooling conditions.On this basis, The vibration test in temperature-varying environment is designed and the results are in good agreement with those of simulation analysis.The research provides a new method to improve the accuracy of vibration test signal.