Mechanical Modelling and Analysis of Cable Driven Parallel Mechanism for Processing
-
摘要: 针对柔索驱动并联加工机构,着重分析了该系统的固有频率及动力学响应特性.构建了系统瞬态时在切削力作用下的振动模型,解算出系统的固有频率;研究了系统的切削力模型和该力作用下的系统响应问题,基于龙格库塔法对系统的受迫振动模型进行数值求解.最后通过数值算例验证了该算法的可行性,并通过快速傅里叶变换(fast fourier transformation,FFT)将时域响应转变为频域解,分析了动平台质量和重心位置参数对系统稳定性的影响.Abstract: The natural frequency and dynamic response characteristics under external excitation of the Cable Drive Parallel Mechanism(CDPM) for Processing are studied. At first,the vibration model of the CDPM system on the stable position and the orientation based on nonlinear cutting force model is built and the natural frequencies are obtained. Then the cutting-force model is introduced and the equations of the forced vibration are presented. The Runge-Kutta method is used to solve the forced vibration equations. Finally,the feasibility of the algorithm is verified by numerical simulations. The frequency domian solution is obtained from the time domian response by Fast Fourier Transformation(FFT). The effects of the centrobaric offset and the mass of the moving platform on the stability of the system are analyzed.
-
[1] Lim wB,Yang,Y S H,et al.A generic: force-ctaosure analysis algorithm for cable-driven parallel manipulators[J]Mechanism and Machine Theory, 2011,46(9):1265-1275 [2] Bosscher P,Ebert-Uphoff I.A stability measure for cable-driven underconstrained robots [C//Proceedings of the 2004 IEEE International Conference on Robotict、& Automation,New Orleans,2004 [3] Zhang B,Kobayashi Y,Chiba T,et al.Robotic patch-stabilizer using wire driven mechanism for minimally invasive fetal surgery[C]//31 st Annual International Conference of the IEEE Engineering in Medicine and Biology Society,Minneapolis,Minnesota,2009 [4] Diao X M,Ma ou.Force-ctaosure analysis of general 6-DOF cable manipulators[C]//Proceedings of the 2007 IEEE/RSJ International Conference on Intelligent Robots and Systems,San Diego,2007 [5] Hiroaki K,Ryuta 0.Adaptive neural network control of tendon-driven mechanisms with elastic: tendons[J] Automatica,2003,39 (9):1509-1519 [6] 警斌,段宝岩,杜敬利,等-种柔索并联机器人的动力学 建模与主动控制[J]振动与冲击,2007,26(3):96-100 Zi B,Duan B Y,Du J L,et al.Modeling and actaive control of a cable-suspended parallel manipulator[J] Journal of Vibration and Shock,2007,26(3):96-100 (in Chinese) [7] Roger B,Adam J,Fred P,et al.Cable-based reconf bwrable machines for large scale manufactauring[C]// Proceedings of the 2000 Japan-USA Symposium on Flexible Automation International Conference on New Technological Innovation for the 21st Century,Ann Arbor,Michigan,2000 [8] Ma 0,Diao X M.Dynamic、analysis of a cable-driven parallel manipulator for hardware-in-the-loop dynamic simulation[C//Proceedings of the 2005 IEEE/ASME International Conference on Advanced Intelligent Mechatronic、,Monterey,California;IEEE,2005 [9] 张波,赵明扬,房立金-种6自由度柔索并联机器人 的动力学研究[J]机械科学与技术,2004,23(6); 735-738 Zhang B,Zhao M Y,Fang L J.Study on dynamic、of a 6-DOF wire driven parallel robot[J]Mechanical Seience and Technology,2004,23(6):735-738(in Chinese) [10] Meunier G,Boulet B,Nahon M.Control of an overactauated cable-driven parallel mechanism for a radio telescope application[J].IEEE Transactaions on Control Systems Technology,2009,17(5):1043-1054 [11] Tang A F,Li Y,Qu H,et al.Dynamic、modeling and simulating analysis of a wire driven parallel mechanism[J[Procedia Engineering,2011,15;788-794 [12] 李忠群复杂切削条件高速铣削加工动力学建模、仿 真与切削参数优化研究[D]北京:北京航空航天大 学,2008 Li Z Q.Dynamic: modeling,simulation and optimization of high speed milling under complicated cutting conditions[D]Beijing; Beihang University,2008(in Chinese)
点击查看大图
计量
- 文章访问数: 102
- HTML全文浏览量: 25
- PDF下载量: 4
- 被引次数: 0