Motion stability analysis of fin-controlled small supercavitating vehicle
In order to explore the influence of deflectable fin on the motion state of small supercavitating vehicle,a nonlinear dynamic model of small supercavitating vehicle with fin-controlled function is established.The dynamic system of the vehicle is calculated,and the stability of the system is judged by Lyapunov exponent spectrum and phase-orbit diagram.The stable system,periodic oscillation system,and chaotic system with different fin feedback gain are analyzed by nonlinear dynamic analysis method,and the feedback gain parameter interval of small non-power supercavitating vehicle maintaining stable motion under velocity attenuation is obtained.The results show that the unpowered small supercavitating vehicle can control its attitude and achieve stable motion by adjusting the feedback gain parameters of the fin.
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