CVT中阻尼器的研究

阐述了电容式电压互感器的各种阻尼器的优缺点,并对速饱和阻尼器设计进行了详述,提出了CVT设计速饱和阻尼器应注意的事项。     

飞行器火工装置的冲击隔离结构方案实验研究

飞行器由于采用了××炸药索作为级间分离及壁板减重的火工装置，当火工品引炸时，对周围的仪器支架和脱拔插头产生高达３００００ｇ的冲击加速度。为保护仪器支架和脱拔插头，本文，总结了多种隔冲击结构方案的试验结果，选出了一种最佳方案，即二级硅橡胶缓冲器与阻尼复合结构的结合形式。该方案可使冲击加速度衰减至１６０ｇ以下。测的是周向过载。４结语粘弹阻尼复合结构用于高频响、高过载的冲击衰减系统尚是一种新的尝试。由于本课题所设计的缓冲支架采用了多级隔冲方式，冲击载荷传递的环节多，而且是三维冲击响应，载荷的波形复杂，不确定因素多，无法采用理论分析的方法进行研究。虽然如此，缓冲器的隔冲特性以及粘弹阻尼复合结构的减振性能还是可以估算的。这方面的理论问题有待于进一步研究。从试验角度而言，本次试验已解决了飞行器的仪器盒及脱拔插头的隔冲击振动问题，证明所设计的隔冲击支架满足使用要求。通过对不同支承界面联接方式的研究，选出了较佳的支承结构形式，即文中的标准状态。该结构形式隔冲击性能好，衰减倍数大，安装和更换方便，防热性能好。试验数据表明，仪器架的衰减倍数大于４００倍，脱拔插头支架大于２９０倍；在最大过载约３００００ｇ，最大响应频率约２２．４     

糖厂现用连续离心机的研究及生产实践

在各糖厂现用连续离心机原有生产实践基础上，对其机械吸震、加温、布温、机索结构、物料密封、机座等部件做了进一步改进，并取得可观的实效。     

辅助轴承系统轴向弹性冲击阻尼器的设计与仿真研究

针对立式磁悬浮转子跌落后对辅助轴承产生较大轴向冲击这一问题,设计加装了相应轴向弹性阻尼器以及径向弹性阻尼器,通过相关阻尼器的压缩变形以及剪切变形储存冲击能量,从而将尖锐的冲击波以较缓和的形式作用在设备上,以达到对辅助轴承以及磁轴承系统的保护作用。通过LS-DYNA动力学仿真软件对未加装以及加装阻尼器两种情况下的跌落工况进行了仿真分析,分别得到了两种情况下的轴向轴心位移曲线,以及第一次冲击峰值时刻的MISES应力云图,并分析了该过程中阻尼器的受力及变形情况。仿真结果表明：添加阻尼器对于减小辅助轴承受力以及减小转子轴向弹跳有着良好效果,同时冲击也不会造成阻尼器的损坏,继而为辅助轴承弹性阻尼器的设计及工程应用提供了一定的理论参考。     

An expert system for the humidity and temperature control in HVAC systems using ANFIS and optimization with Fuzzy Modeling Approach

The aim of this study is to design a HVAC system which damper gap rates have been controlled by PID controller. One of the dampers was controlled by using the required temperature for the interested indoor volume while the other damper was controlled by using the required humidity for the same indoor volume. The realized system has a zone with variable flow-rate by considering the ambient temperature and humidity. In the authors’ previous theoretical work, PID parameters were theoretically obtained by using fuzzy sets for the same HVAC system. Optimization with Fuzzy Modeling Approach of PID parameters has been performed to maximize the performance of the system. The obtained PID parameters in the previous theoretical work were used in this study. Besides, the damper gap rates of a HVAC system with only one zone were predicted by using Artificial Neural Fuzzy Interface System (ANFIS) method. The input-output data sets of this system were first stored and then these data sets were used to obtain its intelligent model and control based on ANFIS. Efficiency of the developed ANFIS method was tested and a mean 99.98% recognition success was obtained. This paper shows that the values predicted with the ANFIS can be used to predict damper gap rate of HVAC system quite accurately. Therefore, faster and simpler solutions can be obtained based on ANFIS.     

A New Damper Scheme to Restrict Torsional Torques on the Turbine Generator Shafts and Blades near a HVDC Link

Due to more various power disturbances occurring in a power system involving a HVDC link, the turbine generator shafts and/or blades are more prone to damage than in general HVAC systems. In this paper, a new mechanical damper scheme based on participation factor approach is proposed to damp torsional torque and prolong the life of turbine mechanism. Two types of torsional damping couplings, inertia damping coupling and elastic damping coupling, are adopted and examined. The optimal type and the optimal location of the damping coupling will be identified and installed to the turbine generator shaft section. The results demonstrate that the best damper may not be installed at the location with the most onerous vibrations but provides satisfactory damping performance on shafts and blades following severe power disturbances in a HVDC link.     

CVT的新型阻尼装置

提出了电子式阻尼器的一种原理结线图。阐述了CVT的基本性能。     

液压阻尼控制系统(HDS)控制底层柔性结构地震反应的时域分析

本文将液压阻尼控制系统ＨＤＳ安装在底层柔性结构的底层,通过地震模拟振动台试验和计算机仿真,在时域内对其进行了深入的研究。