Application of stochastic resonance technique detecting ship′s weak shaft-rate electric field signal
To solve the problem of remote detection of ship′s weak shaft-rate electric field signal in loud noise,a detection method was proposed based on stochastic resonance.Firstly,the basic principle of stochastic resonance was introduced based on which a model for detecting the weak periodic signal was presented.Then,a ship model′s shaft-rate electric field signal of low SNR was input to the detecting model and the power spectrum of the output signal was obtained.The result indicates that the stochastic resonance technique can detect the ship′s weak shaft-rate electric field signal in loud noise effectively and has much superiority over traditional methods in weak signal processing.Also,the influence of the parameters on the output power spectrum of the system was analyzed through the detection example.
We study the problem of stabilizing a distributed linear system on a subregion of its geometrical domain. We are concerned with two methods: the first approach enables us to characterize a stabilizing control via the steady state Riccati equation, and the second one is based on decomposing the state space into two suitable subspaces and studying the projections of the initial system onto such subspaces. The obtained results are performed through various examples.