主被动组合减振式智能弹簧支承设计与控制方法研究

项目名称： 主被动组合减振式智能弹簧支承设计与控制方法研究

项目编号： No.51505215

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 李苗苗

作者单位： 南京航空航天大学

项目金额： 20万元

中文摘要： 为满足直升机传动系统高功重比的设计要求，直升机尾传动轴系需要采用超临界设计。针对直升机尾传动轴系在跨越临界转速区时振幅急剧增大的问题，本项目提出了一种由主支承和辅助支承组成的主被动组合减振式智能弹簧支承结构。传动轴系的振动较平稳或强度较小时，振动由主支承进行被动抑制；而只有在传动轴系跨越临界转速区且振幅急剧增大、传动轴系受突加不平衡激励或直升机机动飞行使得传动轴系的振动特性发生较大改变时，辅助支承才发挥主动抑制振动的作用。项目将围绕智能弹簧支承，探索橡胶硅油阻尼主支承的刚度、阻尼作用机理，进行主支承的参数设计；揭示智能弹簧支承结构参数与传动轴系振动特性的映射规律，提出多支点传动轴系中智能弹簧支承的配置方法，建立智能弹簧支承的设计方法；研究智能弹簧支承传动轴系的振动特性演变规律，实现直升机机动飞行时和突加不平衡激励下智能弹簧支承传动轴系的自适应振动控制。

中文关键词： 传动轴系；智能弹簧支承；主被动组合减振；振动控制；直升机传动

英文摘要： In order to satisfy the requirement of high power to weight ratio, supercritical speed design method need to be adopted for tail drive shaft system of helicopter. Considering the vibration amplitude of helicopter tail drive shaft system could be increased sharply while passing the critical speed region, a smart spring support structure consisting of a main and auxiliary supports is proposed, which act as active and passive vibration control method respectively. The vibration of multi-supports drive shaft system is suppressed by the main support with passive anti-vibration function while the vibration amplitude is changed insignificantly. Otherwise, the vibration is suppressed by main support and auxiliary support simultaneously when the vibration amplitude of shaft changed sharply or under a sudden unbalanced excitation or in the maneuvering flight state. The objectives of this research include three aspects. First, the stiffness and damping effect of the combined rubber-silicone oil viscoelastic damper are explored, and its parameter matching is studied. Second, the mapping law of the smart-spring structure parameter and vibration characteristics of the transmission shaft is revealed, and the distribution method of the smart-spring support is represented, and its design system is established. Third, the evolvement rule of the vibration characteristics of the shaft system with smart-spring support is studied, and adaptive vibration control of the transmission shaft system with smart-spring support is realized under the effects of the helicopter maneuvering flight and sudden unbalanced excitation.

英文关键词： drive shaft system;smart spring support;combined active and passive vibration isolation;vibration control;helicopter transmission