As mentioned above, three parameter VFD model can characterize the viscoelasticity of solid propellant. Applied it to SRM dynamic analysis, time and frequency domain response can be calculated.
综上所述，三参数VFD模型能够很好的反映推进剂的粘弹特性，将它用于固体发动机动力学分析，可以得到药柱在时域和频域内的动态响应。
It Outlines the fundamentals and the basic mathematical model of identifying modal frequency and damping by means of parameter identification with frequency domain and time domain.
简要介绍了用频域参数识别方法和时域参数识别方法识别模态频率和阻尼的基本原理和基本数学模型。
Secondly, two classical models of distributed parameter DLSP: power frequency model and time-domain model. Based on these two models dynamic phasor model has been deduced.
其次，本文分析了同杆双回线分布参数的两种经典模型：工频量模型和时域模型，并在此基础上推导了时变动态相量模型。
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