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J4  2009, Vol. 43 Issue (5): 890-896    DOI: 10.3785/j.issn.1008-973X.2009.05.020
动力与机械工程     
零重力模拟气动悬挂系统的开发及关键技术
 路波, 陶国良, 刘昊
(浙江大学 流体传动及控制国家重点实验室,浙江 杭州 310027)
Development and key technologies of pneumatic suspension system  for zero-gravity simulation
LU Bo, TAO Guo-liang, LIU Hao
(State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China)
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摘要:

为了模拟低频空间结构动力学测试时的零重力环境,研制出一种高精度的气动悬挂系统,解决了系统设计中的气动关键技术问题.从系统设计角度分析了试验装置的工作原理和系统参数对垂直悬挂频率的影响,以指导系统的低频设计.基于空气静压润滑的原理,设计了内部供压节流孔支撑的无摩擦气缸以消除系统的摩擦力,建立了活塞和缸筒间隙内气体泄漏流动和径向承载能力的数学模型,并分析了结构参数对其性能的影响,指出影响气缸性能的关键因素是活塞间隙和节流孔尺寸.利用比例阀构建了压力控制系统以实现高精度的重力补偿.试验结果表明,该气动悬挂系统可以满足低频、高精度和无摩擦的设计要求,验证了方案的可行性和有效性.

Abstract:

A high precision pneumatic suspension system was developed and its key technique problems were solved to simulate the zero-gravity environment for  dynamic testing of low frequency space structures. The operating principle of the test device and the influences of system parameters on the vertical suspension frequency were analyzed to guide the low-frequency design from the perspective of system design. Based on the theory of aerostatic lubrication, a type of air-suspending frictionless cylinder supported by orifice restrictors  was designed to eliminate the friction using inner gas pressure.  The models of gas leakage and radial load capacity in the clearance were built and the influences of structural parameters on the cylinder performance were discussed. The important factors affecting the cylinder performance were indicated to be the dimensions of the piston clearance and the orifice restrictors. Finally, a pressure control system using a proportional valve was established to implement the high precision gravity compensation. Experimental results showed that the suspension system can meet the demand of low suspension frequency, high precision and no friction, which verify the feasibility and validity of the design.

出版日期: 2009-11-18
:  TH138  
基金资助:

“十五”航天支撑技术资助项目.

通讯作者: 陶国良,男,教授,博导.     E-mail: gltao@zju.edu.cn
作者简介: 路波(1979-),男,山东济宁人,博士生,从事气动伺服及机电控制方面的研究.
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引用本文:

路波, 陶国良, 刘昊. 零重力模拟气动悬挂系统的开发及关键技术[J]. J4, 2009, 43(5): 890-896.

LU Bo, TAO Guo-liang, LIU Hao. Development and key technologies of pneumatic suspension system  for zero-gravity simulation. J4, 2009, 43(5): 890-896.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2009.05.020        http://www.zjujournals.com/eng/CN/Y2009/V43/I5/890

[1] KIENHOLZ D A, CRAWLEY E F, HARVEY T J. Very low frequency suspension systems for dynamic testing [C]∥ Proceedings of the 30th Structures, Structural Dynamics and Materials. Mobile: AIAA, 1989.
[2] 左鹤声,彭玉莹. 振动试验模态分析[M]. 北京:中国铁道出版社, 1995.
[3] JAGANNATHAN S, FENN R C, JOHNSON B G. Low-cost active anti-gravity suspension system [C]∥ Proceedings of the 14th American Control Conference. Seattle: [s.n.], 1995.
[4] HASSELMAN T K, QUARTARARO R. A suspension system for large amplitude dynamic testing in a simulated weightless environment [C]∥ Proceedings of SPIE — Smart Structures and Materials. Albuquerque: SPIE, 1993, 1917: 10631077.
[5] WOODARD S E, HOUSNER J M. Nonlinear behavior of a passive zero-spring-rate suspension system [J]. Journal of Guidance, Control, and Dynamics, 1991, 14(1): 8489.
[6] HARVEY T J. Adjustment of zero spring rate suspensions: US, 5,024,111 [P]. 1991-01-18.
[7] CHEW M S, JUANG J N, YANG L F. Suspension device for low frequency structures: US, 5,207,110 [P]. 1993-05-04.
[8] KIENHOLZ D A. Simulation of the zero-gravity environment for dynamic testing of structures [C]∥ Proceedings of the 19th Space Simulation Conference. Baltimore: NASA, 1996.
[9] 韦娟芳. 卫星天线展开过程的零重力环境模拟设备[J]. 空间电子技术, 2006(2): 2932.
WEI Juan-fang. Equipments of satellite antenna deployment process for zero-gravity environment simulation [J]. Space Electronic Technology, 2006(2): 2932.
[10] 十合晋一. 气体轴承设计、制作与应用[M]. 韩焕臣,译.北京:宇航出版社, 1988.
[11] 刘暾,刘育华,陈世杰. 静压气体润滑[M]. 哈尔滨:哈尔滨工业大学出版社, 1990.
[12] 吴震宇,陶国良. 燃料电池用高速单螺杆压缩机的仿真研究[J]. 浙江大学学报:工学版, 2006, 40(2): 309312.
WU Zhen-yu, TAO Guo-liang. Simulation of high speed single screw compressor in fuel cell [J]. Journal of Zhejiang University: Engineering Science, 2006, 40(2): 309312.
[13] POWELL J W. Design of aerostatic bearings [M]. London: Machinery Publishing Co. Ltd., 1970.

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