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立体库堆垛机运行系统优化研究 被引量:1
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作者 王欣伟 闫明 《组合机床与自动化加工技术》 北大核心 2024年第5期111-115,共5页
针对立体库堆垛机的立柱在加减速变化时易出现挠度变形的问题,以单立柱堆垛机为研究对象,基于挠度理论,分析影响立柱产生挠度形变的主要因素;将立柱简化为悬臂梁,推导立柱顶端的摆动方程,并建立Simulink仿真模型;以系统运行效率和稳定... 针对立体库堆垛机的立柱在加减速变化时易出现挠度变形的问题,以单立柱堆垛机为研究对象,基于挠度理论,分析影响立柱产生挠度形变的主要因素;将立柱简化为悬臂梁,推导立柱顶端的摆动方程,并建立Simulink仿真模型;以系统运行效率和稳定性为评价指标,采用遗传算法对堆垛机的速度控制曲线进行多目标优化,并对优化后的速度控制曲线进行仿真分析。研究表明,在堆垛机水平和竖直方向运行到最大距离工况下,优化后的堆垛机运行时间由12.5 s减少至11.621 s,系统的运行效率提升7.03%;最大振幅由5.99 mm减少至5.08 mm,在提高运行效率的前提下,系统的运行稳定性提升了15.2%,降低了堆垛机在运行过程中的挠度形变,验证了优化方法的可行性,可为堆垛机的设计研究提供参考依据。 展开更多
关键词 单立柱堆垛机 挠度形变 摆动方程 仿真模型 遗传算法
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Improved model to solve influence coefficients of work roll deflection
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作者 赵铁勇 肖宏 《Journal of Central South University》 SCIE EI CAS 2010年第5期1000-1005,共6页
According to the concept of virtual bending force,a rational explanation for SHOHET's model was presented. Considering the deformation characters of the work rolls in four-high mill,the deformation model of the wo... According to the concept of virtual bending force,a rational explanation for SHOHET's model was presented. Considering the deformation characters of the work rolls in four-high mill,the deformation model of the work roll was regarded as a cantilever beam and new influence coefficients were deduced.The effect of the bending force was taken into account independently. Therefore,the contribution to work roll deflection caused by rolling load,rolling pressure between rolls and bending force can be got from the new formulas.To validate the accuracy of the formulas,the results obtained from the new formulas were compared with those from SHOHET's formulas.It is found that they highly coincide,which illustrates that the formulas are reliable. 展开更多
关键词 work roll influence coefficient cantilever beam bending force
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