Here, aiming at the protection problem of equipment under strong impact environment, according to the calculation formula of annular gap damping coefficient, and based on double-out-bar damping structure, a Stewart anti-impact vibration isolation platform based on new damping structure was proposed. Through numerical simulation, energy-dissipating characteristics of new damping structure were compared with those of traditional double-out-bar damping structure under condition of SDOF. The results showed that the difference between the maximum damping forces of the two structures increases with increase in excitation frequency, the energy-dissipating of the new damping structure increases by 28%; through co-simulation of Adams and MATLAB, impact responses of Stewart platform with new damping structure and Stewart platform with double-out-bar damping structure were calculated; in vertical impact, the maximum difference between leg damping forces of the two platforms is 310 N, the reset time of Stewart platform with new damping structure is 49.7% shorter than that of Stewart platform with double-out-bar damping structure; while in inclined 45° impact, compared to Stewart platform with double-out-bar damping structure, the reset time of Stewart platform with new damping structure decreases by 26.2% in y direction and 36.3% in z direction; according to the positive and negative dual-wave testing results, the co-simulation calculation can accurately describe response characteristics of Stewart platform under impact, and reveal Stewart platform with new damping structure has better anti-shock damping capacity.
Key words
new damping structure /
Stewart platform /
shock response /
characteristic analysis
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References
［1］朱章根,杨家谋,钟云.Stewart平台动力学分析［J］.农业与技术,2019,39(13):31-36.
ZHU Zhanggen,YANG Jiamou,ZHONG Yun.Dynamic analysis of Stewart platform［J］.Agriculture and Technology,2019,39(13):31-36.
［2］赵荣珍,唐小斌,马德福.Stewart被动隔振平台结构参数对系统固有频率的影响［J］.兰州理工大学学报,2018,44(3):39-44.
ZHAO Rongzhen, TANG Xiaobin, MA Defu. The influence of structural parameters of Stewart passive vibration isolation platform on the natural frequency of the system［J］.Journal of Lanzhou University of Technology,2018,44(3):39-44.
［3］STEWART D. A platform with six degrees of freedom ［J］Proc-eedings of the Institution of Mechanical Engineers, 1965, 180(1): 371-386.
［4］SELIG J M, DING X. Theory of vibration in Stewart platforms ［A］. Proceeding of the 2001 IEEE /RSJ ［C］. 2001 International Conference on Intelligent Robots and Systems, Mau, Hawai, USA, 2001
［5］梁康. 基于Stewart隔振平台的航天器主动隔振控制器设计［D］.哈尔滨:哈尔滨工业大学,2019.
［6］BAIG R U, PUGAZHENTHI S. Design optimization of stewart platform confguration for active vibration isolation［J］. Indian Journal of Science and Technology, 2015, 8(23):1-8.
［7］胡启国,骆艳丽,王宇谦.基于多目标遗传算法的Stewart平台运动学正解解算［J］.机械传动,2019,43(3):48-53.
HU Qiguo, LUO Yanli, WANG Yuqian.Stewart platform forward kinematics solution based on multi-objective geneticalgorithm［J］.Mechanical Transmission,2019,43(3):48-53.
［8］PREUMONTA A, HORODINCAA M, ROMANESCUA I, et al. A six-axis single-stage active vibration isolator based on Stewart platform［J］. Journal of Sound and Vibration, 2007,300:644-661.
［9］CHI Weichao, CAO Dengqing, WANG Dongwei, et al. Design and experimental study of a VCM-based stewart parallel mechanism used for active vibration isolation［J］. Energies, 2015, 8(8)：8001-8019.
［10］温肇东，张春辉，张磊. 软特性刚度在被动式Stewart隔冲平台中的应用研究［J］. 兵工学报，2015，36(增刊1):145-151.
WEN Zhaodong, ZHANG Chunhui, ZHANG Lei. Effect of soft stiffness on a passive stewart shock isolation platform［J］. Acta Armamentarii, 2015, 36(Sup 1):145-151.
［11］张春辉，汪玉，温肇东，等. 被动式Stewart隔冲平台的刚度特性［J］. 振动、测试与诊断，2015,35(2):289-294.
ZHANG Chunhui, WANG Yu, WEN Zhaodong, et al. Research on stiffness characteristics of a passive stewart shock isolation platform［J］. Journal of Vibration, Measurement & Diagnosis, 2015, 35(2):289-294.
［12］欧进萍, 丁建华. 油缸间隙式黏滞阻尼器理论与性能试验［J］. 地震工程与工程振动, 1999, 19 (4): 82-89.
OU Jinping, DING Jianhua. Theory and performance test of cylinder gap viscous damper［J］. Earthquake Engineering and Engineering Vibration, 1999, 19(4): 82-89.
［13］沈崇棠, 刘鹤年. 非牛顿流体力学及其应用［M］. 北京：高等教育出版社, 1989.
［14］中国舰船研究院，BV043/85前联邦德国国防军舰艇建造规范：冲击安全性［S］.北京：中国舰船研究院，1985.
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