基于混沌同步与迁移控制的隔振系统线谱控制方法

Line spectrum reduction of a vibration isolation system via chaotic synchronization and migration control

为隐匿并降低船舶辐射水声中的线谱信息,提升船舶水声隐身性能,提出了一种基于混沌同步与迁移控制的船舶机械设备隔振系统(VIS)线谱控制方法。利用广义同步控制使隔振系统处于持续混沌运动状态,分析混沌同步系统的多吸引子共存现象以及不同吸引子对应的线谱控制效果,分别对开环控制、线性反馈控制、开环加闭环控制、开环加非线性闭环控制等迁移控制方法展开算法研究和稳定性研究,并将其应用于同步系统中混沌吸引子之间的迁移控制。仿真结果表明:广义同步控制下的隔振系统中有多个稳定的混沌吸引子,选择合适的迁移控制方法能够使混沌同步系统稳定运行于小振幅的混沌运动,降低特征线谱强度和设备振幅,并且该方法具有稳定性强、能耗低的特点。

To conceal and reduce the line spectrum components of the underwater acoustic radiation of marine vessels,a novel method was proposed for line spectrum reduction of a vibration isolation system(VIS)via chaotic synchronization and migration control.Firstly,the VIS was stabilized in a persistent chaotic motion using generalized synchronization,the multi-attractor coexistence of the chaotic synchronization system,and the effect of line spectrum reduction at different attractors were analyzed.Then,the algorithm and stability of different migration control methods,including open-loop control,linear feedback control,open-plus-closed-loop control,and open-plus-nonlinear-closed-loop control were studied separately and applied to the migration of chaotic attractors in the chaotic synchronization system.Simulation results show that there are multiple stable chaotic attractors in the VIS under generalized synchronization.By using the appropriate migration control method,the chaotic synchronization system can run stably in the chaotic motion with a small amplitude,thereby reducing the intensity of the characteristic line spectrum and the amplitude of the isolated equipment.Moreover,the method has strong stability and low energy consumption.