摘要
混沌测量方法适用于强噪声中正弦信号的参数测量,用Simulink对此类方法进行仿真实验验证和效果评估时,需要研究混沌测量仿真系统的形式,尤其是噪声的建模及其参数设置,以保证实验结论的正确性。仿真系统的形式包括仿真模块及其参数设置,据此仿真系统的形式分为三种。利用非线性随机微分方程的数值积分法对积分模块进行分析后发现:不同的仿真系统形式对应两种不同的噪声模型。根据噪声的统计特性和维纳-辛钦定理求出了这两种噪声模型的平均功率和带宽,为混沌测量仿真中噪声模块的参数选择提供了理论依据。
Chaos measurement method is suitable for parameters measurement of sinusoidal signal in strong noise. When this method is proved and evaluated by simulation testing in Simulink, in order to ensure correctness of conclusion from the testing, it is necessary to study the simulation system in detail, especially modeling of the noise and its parameters configuration. The simulation system includes simulation modules and their parameters configuration and can be divided into three kinds. After analyzing integral module by numerical value integral methods for non-linear stochastic differential equation, it is found that different kinds of simulation systems have two different kinds of noise models. According to noise statistical characters and ~ener-Khintchine theorem, average power and frequency bandwidth of these two noise models is deduced. These works provide theory support for parameters configuration of noise module in chaos t simulation
出处
《系统仿真学报》
CAS
CSCD
北大核心
2012年第10期2079-2082,共4页
Journal of System Simulation
