Closed-loop controlled zero-amplitude broadband vibration isolation floating raft

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Closed-loop controlled zero-amplitude broadband vibration isolation floating raft

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ZHANG YUNPING

Amplitude transmitted from a raft body along with the change of working frequency of a host within a threshold range is sensed by a sensor and fed back to a vibration isolation control box through a wire, the vibration isolation control box operates and drives a motor to drive a worm, a ball nut and a turbine to rotate through a wire command, and the vibration isolation control box drives the worm, the ball nut and the turbine to rotate. The rigidity of the vibration absorption spring is changed by selecting or rejecting the number of effective turns, so that the inherent frequency of the vibration absorber is synchronous with the working frequency of the main machine, the amplitude of the raft body is migrated to the vibration absorption block, a sensing signal disappears when the amplitude of the raft body is attenuated to zero, the vibration isolation control box drives the motor to stop rotating through a wire instruction, and the vibration and noise disappearance of the main machine is zero. And the naval vessel can quickly change to multi-speed and silently move forward.

本发明是一种闭环控制的零振幅宽频隔振浮筏：阈值范围内，随着主机工作频率的变化，经筏体上面传递过来的振幅，由传感器感知并通过导线反馈给隔振控制箱，隔振控制箱经过运算，通过导线指令驱动电机带动蜗杆、滚珠螺母涡轮旋转，通过取舍有效圈数改变吸振弹簧的刚度，令吸振器的固有频率和主机工作频率同步，使得筏体振幅向吸振块迁移，筏体振幅衰减为零时感知信号消失，隔振控制箱通过导线指令驱动电机停止旋转，值此，主机的震动和噪声消失为零，舰艇得以快变多速、静默前行。