For monitoring the friction torque and its inhomogeneity of arc-shaped structure seeker servo mechanism and adjusting its main influencing factors which are preload force and clearance during assembly, a measurement system for precision assembly is built. It is designed by principle of vertical structure in line and based electrical measurement. In the process of precise assembly, servo's performance can be controlled by monitoring drive torque of motor and adjusting assembly parameters. The influence of arc frame's mass-eccentric torque is analyzed and experimentally verified, and its interference is eliminated. The relationship between the preload forces of eccentric rollers and friction torque is experimentally verified, and the numerical range of preload forces is determined. The problem of automatic running process is solved, which is of great significance to reduce the fluctuation and inhomogeneity of friction torque. Based on the friction torque measurement system, the assembly process of arc-shaped structure seeker servo mechanism is optimized, and the qualitative method based on the experience of technician is optimized as a quantitative method based on measured torque.
WU Wei
,
SHANG Jianzhong
,
LUO Zirong
,
CAO Yujun
,
YU Naihui
. Friction Torque Measurement System and Precision Assembly Process for Arc-shaped Structure Seeker Servo Mechanism[J]. Journal of Mechanical Engineering, 2018
, 54(11)
: 77
-84
.
DOI: 10.3901/JME.2018.11.077
[1] 周宗马. 一种导引头伺服机构结构设计与仿真分析[D]. 南京:南京理工大学, 2015. ZHOU Zongma. Research on several essential problems of imaging seeker servo mechanism[D]. Nanjing:Nanjing University of Science and Technology, 2015.
[2] PRELIASCO R J. Wide-look-angle gimbal for an airborne electro-optical system[C]//SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation. International Society for Optics and Photonics, 1993.
[3] 姜绍娜,陈晓阳,顾家铭,等. 陀螺框架轴承摩擦力矩分析[J]. 机械工程学报, 2016, 52(7):60-68. JIANG Shaona, CHEN Xiaoyang, GU Jiaming, et al. Analysis of friction moment of gyroscope frame bearing[J]. Journal of Mechanical Engineering, 2016, 52(7):60-68.
[4] SHANG Yaoxing, JIAO Zongxia, WANG Xiaodong, et al. Study on friction torque loading with an electro-hydraulic load simulator[J]. Chinese Journal of Aeroautics, 2009(22):691-699.
[5] PAPADOPOULOS E G, CHASPARIS G C. Analysis and model-based control of servomechanisms with friction[J]. Analysis and Model-based Control of Servomechanisms with Friction, 2004, 3:2109-2114.
[6] 孙克,张文杰,于乃辉,等.一种精密装配用在线实时测量系统:中国, CN10418103A[P]. 2014-12-10. SUN Ke, ZHANG Wenjie, YU Naihui, et al. An online measurement system for precision assembly:China, CN10418103A[P]. 2014-12-10.
[7] 于爽,付庄,赵辉,等. 惯性平台不平衡力矩测试方法及补偿控制[J]. 上海交通大学学报, 2008, 42(10):1692-1696. YU Shuang, FU Zhuang, ZHAO Hui, et al. Measurement method and compensation control for unbalanced moment of inertial platform[J]. Journal of Shanghai Jiaotong University, 2008, 42(10):1692-1696.
[8] 朱华征,范大鹏,张文博,等. 质量不平衡力矩对导引头伺服机构性能影响分析[J]. 红外与激光工程, 2009, 38(5):767-772. ZHU Huazheng, FAN Dapeng, ZHANG Wenbo, et al. Influence analysis of the mass imbalance torque on the performance of seeker servo mechanism[J]. Infrared and Laser Engineering, 2009, 38(5):767-772.
[9] 申帅,张葆,李贤涛,等. 航空光电稳定平台质量不平衡力矩的前馈补偿[J]. 光学精密工程, 2017, 25(5):1281-1290. SHEN Shuai, ZHANG Bao, LI Xiantao, et al. Feedforward compensation of mass unbalance moment for airborne photoelectric stabilized platform[J]. Optics and Precision Engineering, 2017, 25(5):1281-1290.
[10] BOYNTON R, WIENER K, KENNEDY P, et al. Static balancing a device with two or more degrees of freedom[C]//The 62nd Annual Conference of Society of Allied Weight Engineers. Connecticut, 2003(3320):3-43.
[11] YANG H, ZHAO Y, LI M, et al. The static unbalance analysis and its measurement system for gimbals axes of an inertial stabilization platform[J]. Metrology and Measurement Systems, 2015, XXⅡ(1):51-68.
[12] BOUYER J, FILLON M. Experimental measurement of the friction torque on hydrodynamic plain journal bearings during start-up[J]. Tribology International, 2011, 44(7-8):772-781.
[13] 冯炳. 摩擦力矩的测试方法研究[D]. 哈尔滨:哈尔滨工业大学, 2010. FENG Bing. Research of test methods for friction torque[D]. Harbin:Harbin Institute of Technology, 2010.
[14] 高奋武. 平衡力法在轴承摩擦力矩测量中的应用[J]. 轴承, 2005(12):33-34. GAO Fenwu. The application of balance force method in bearing friction moment measurement[J]. Bearing, 2005(12):33-34.
[15] 李副来,李济顺,朱孔敏. 轴系摩擦力矩测量仪的研制[J]. 轴承, 2008(10):38-40. LI Fulai, LI Jishun, ZHU Kongmin. Research on the friction moment measuring system of shafting[J]. Bearing, 2008(10):38-40.
[16] 任美荣. 精密伺服传动机构摩擦力矩的测试研究[D]. 西安电子科技大学, 2014. REN Meirong. Measurement study on friction torque for a precision servo drive mechanism[D]. Xi'an:Xidian University, 2014.
[17] 张彪. 特种机电系统摩擦力矩测试方法研究和应用[D]. 西安电子科技大学, 2013. ZHANG Biao. Research and application of friction torque measurement methods for a special electromechanical system[D]. Xi'an:Xidian University, 2013.
[18] 代亚新, 谢超. 两自由度精密伺服机构装配工艺研究[J]. 航天制造技术, 2011(2). DAI Yaxin, XIE Chao. Study on assembly technology of servomechanism with two degree freedom[J]. Aerospace Manufacturing Technology, 2011(2).
[19] 孙大乐,杨文通,蔡春源. 双圆弧齿轮跑合的计算机仿真[J]. 机械工程学报, 1997, 33(1):9-14. SUN Dale, YANG Wentong, CAI Chunyuan. Computer simulation of double circular arc gear running[J]. Chinese Journal of Mechanical Engineering, 1997, 33(1):9-14.
[20] 陈思雨,唐进元,王志伟,等. 修形对齿轮系统动力学特性的影响规律[J]. 机械工程学报, 2014, 50(13):59-65. CHEN Siyu, TANG Jinyuan, WANG Zhiwei, et al. Effect of modification on dynamic characteristics of gear transmissions system[J]. Journal of Mechanical Engineering, 2014, 50(13):59-65.
[21] 佚名. 中国航天科工二院精密装配技术获突破[J]. 现代军事, 2015(5):111. Unknown. Breakthrough in precision assembly technology second research institute of the china aerospace science and industry group[J]. Modern Military, 2015(5):111.
