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This paper employs a multi-parameter multi-step chaos control method, which is built up on the OGY method, to stabilize desirable UPOs of a gear system with elastomeric web as a high-dimensional and non-hyperbolic chaotic system, and the analyses are carried out. Three types of relations between components of a certain control parameter combination are defined in a certain control process. Special emphasis is put on the comparison of control efficiencies of the multi-parameter multi-step method and single-parameter multi-step method. The numerical experiments show the ability to switch between different orbits and the method can be a good chaos control alternative since it provides a more effective UPOs stabilization of high-dimensional and non-hyperbolic chaotic systems than the single-parameter chaos control, and according to the relation between components of each parameter combination, the best combination for chaos control in a certain UPO stabilization process are obtained. 相似文献
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人字齿轮传动的轴向振动会引起轴向分力不平衡,啮合位置变化,箱体振动,可能会造成高速大功率人字齿轮传动的失效。根据人字齿轮传动的结构,将其视为两对斜齿轮窜动,采用集中参数法,建立了人字齿轮传动的动力学模型和振动方程。在考虑时变啮合刚度、传动误差、螺旋角误差和偏心误差等的情况下,对人字齿轮传动的强迫振动响应进行了数值求解,获得了人字齿轮传动的轴向振动位移,以及轴向振动位移随齿轮螺旋角误差的变化趋势,得出人字齿轮窜动的轴向振动主要是由于螺旋角误差以及时变啮合刚度造成的结论,为止推滑动轴承的刚度设计提供了基础。 相似文献
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倾转旋翼机是一种新型直升机,是各航空强国争相研究的航空前沿技术,传动系统作为倾转旋翼机的关键系统,其振动特性对直升机的飞行性能和飞行安全有直接影响。本文以该型直升机发动机短舱内的传动系统为研究对象,根据其传动结构,采用集中质量法,在考虑时变啮合刚度等因素的情况下,建立了新型直升机传动系统的弯-扭耦合动力学模型和动态响应方程,根据倾转旋翼机的飞行特点,针对其在起降、巡航和过渡三种状态下的旋翼激励对传动系统动态响应进行了数值求解,最后研究了传动系统中齿轮啮合的动载系数的变化特点,得出在过渡状态下系统存在拍振现象的结论。研究工作对倾转旋翼直升机的传动系统的可靠性分析、动态效率分析和动态优化设计等均有重要意义,并为我国新型直升机传动系统的研制奠定基础。 相似文献
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