Self-adapting random resonant weak signal detection method
A technology of weak signal detection and stochastic resonance, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc.
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[0028] The self-adaptive stochastic resonance weak signal detection method of the present invention uses the method of combining the best matching stochastic resonance and the stochastic resonance induced by an external signal to realize the self-adaptive detection of the weak characteristic frequency signal. The steps are as follows:
[0029] 1. According to the stochastic resonance theory of the bistable system, the numerical simulation is carried out to obtain the corresponding relationship between the noise intensity and the frequency of the bistable system best matching stochastic resonance under the condition of small signal in the extremely low frequency range.
[0030] The nonlinear bistable system driven by periodic signal and white noise essentially describes the movement of a particle in a symmetrical double potential well when it is driven by external force and noise at the same time.
[0031] A bistable system can be described by the Langevin equation:
[0032] ...
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