舰船浮筏混合隔振系统建模及约束输出控制策略

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (20) : 191-197.

论文

杨明月，孙玲玲，王晓乐

作者信息 +

Hybrid floating raft systems with actuator output constraints for marine ships

YANG Ming-yue，SUN Ling-ling，WANG Xiao-le

Author information +

文章历史 +

摘要

针对舰船内部动力机组浮筏系统低频隔振效果不佳的问题，提出有源前馈控制解决方案。建立由多向扰动振源、分布参数主被动一体式隔振器、中间柔性筏体及弹性安装基础组成的浮筏混合隔振系统结构声传递广义数理模型。基于导纳矩阵理论，定量考虑实际作动器输出的阈值限制，给出浮筏混合隔振系统动态传递特性统一数学模型。从声振能传递与控制角度揭示系统耦合振动机理并给出浮筏系统隔振设计遵循准则。研究表明，力矩激励在浮筏隔振系统能量传输中扮演重要角色，应尽量减少力矩扰动所致能量注入；中间筏体结构柔性及与隔振器内共振的耦合交互作用使中高频段系统隔振性能恶化；全主动控制策略可结合上、下层主动控制策略在低、中高频段的振动控制优势，能实现宽频域内声振能控制最优化。

Abstract

In order to improve the low-frequency performance of floating raft systems which are always used in marine ships, a feedforward active control solution is proposed. The analytical model which consisted of complex excitations, distributed parameter isolators, a flexible floating raft and a non-rigid foundation is established. Considering the output threshold of actual actuators, the general mathematic description of the dynamic transfer characteristics of the overall system is given by using the mobility matrix approach. It is shown that moment excitations played an important role in the vibration transfer process. Coupling interactions between the elastic raft and distribution parameter isolators can lead to a deterioration of performance in the high-frequency domain. The upper active control strategy can achieve good effect during rigid-body modal frequencies, and the prominent advantage of the lower active control strategy is mainly reflected in higher frequencies. However, the full active control strategy can realize the optimal control of vibra-acoustic power among broadband domain.

导出引用

杨明月，孙玲玲，王晓乐. 舰船浮筏混合隔振系统建模及约束输出控制策略[J]. 振动与冲击, 2015, 34(20): 191-197

YANG Ming-yue，SUN Ling-ling，WANG Xiao-le. Hybrid floating raft systems with actuator output constraints for marine ships[J]. Journal of Vibration and Shock, 2015, 34(20): 191-197

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