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Uncertainty quantification of mechanism motion based on coupled mechanism—motor dynamic model for ammunition delivery system
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作者 Jinsong Tang Linfang Qian +3 位作者 longmiao chen Guangsong chen Mingming Wang Guangzu Zhou 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第3期125-133,共9页
In this paper,a dynamic modeling method of motor driven electromechanical system is presented,and the uncertainty quantification of mechanism motion is investigated based on this method.The main contribution is to pro... In this paper,a dynamic modeling method of motor driven electromechanical system is presented,and the uncertainty quantification of mechanism motion is investigated based on this method.The main contribution is to propose a novel mechanism-motor coupling dynamic modeling method,in which the relationship between mechanism motion and motor rotation is established according to the geometric coordination of the system.The advantages of this include establishing intuitive coupling between the mechanism and motor,facilitating the discussion for the influence of both mechanical and electrical parameters on the mechanism,and enabling dynamic simulation with controller to take the randomness of the electric load into account.Dynamic simulation considering feedback control of ammunition delivery system is carried out,and the feasibility of the model is verified experimentally.Based on probability density evolution theory,we comprehensively discuss the effects of system parameters on mechanism motion from the perspective of uncertainty quantization.Our work can not only provide guidance for engineering design of ammunition delivery mechanism,but also provide theoretical support for modeling and uncertainty quantification research of mechatronics system. 展开更多
关键词 Ammunition delivery system Electromechanical coupling dynamics Uncertainty quantification Generalized probability density evolution
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薄壁弹药机械臂的柔性动力学建模与辨识研究
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作者 汤劲松 钱林方 +3 位作者 马佳 陈龙淼 陈光宋 董帅 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2024年第1期226-239,共14页
薄壁结构是机械设计中常用的结构形式,其柔性动力学问题一直是工程研究的前沿。针对具有薄壁结构特性的弹药机械臂,发展了一种基于板壳理论的弹药机械臂柔性多体动力学建模方法.我们在浮动参考坐标框架下,得到了Reissner-Mindlin壳结构... 薄壁结构是机械设计中常用的结构形式,其柔性动力学问题一直是工程研究的前沿。针对具有薄壁结构特性的弹药机械臂,发展了一种基于板壳理论的弹药机械臂柔性多体动力学建模方法.我们在浮动参考坐标框架下,得到了Reissner-Mindlin壳结构的运动学方程,其中结构膜变形和弯曲变形与刚性运动的耦合,这是区别于实体结构的特点。为了克服壳体单元模拟中的膜锁定和剪切锁定问题,引入一种基于边中心的应变平滑DSG(ECSS-DSG)单元对结构离散.该方法可以获得更好的膜变形和弯曲变形行为,并且有效克服剪切自锁问题,在结构模态分析中表现出更好的效果.在此基础上,结合实验对弹药机械臂模型参数进行了辨识,并且对辨识模型在各种工况下的动态响应进行了验证,证明了本文方法具有良好的鲁棒性.本文的工作不仅可以为弹药机械臂的进一步研究提供理论支撑,而且可以为薄壁结构多体系统的动力学研究提供参考. 展开更多
关键词 机械臂 实体结构 柔性动力学 柔性多体动力学 薄壁结构 多体系统 板壳理论 弯曲变形
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