一种机床参数及其区间变化范围的主动设计方法
发布时间：2018-08-06 09:52
【摘要】：以机床结构固有频率变化范围可控为目的,提出一种机床参数及其变化范围的主动设计方法,实现了系统结构参数允许变化范围的快速计算。首先,将动结合部刚度参数变化以区间数表达,给出了机床结构参数敏感性区间的计算方法以及准确预估固有频率变化范围的计算方法;然后,根据预先给定系统期望的振动模态及分布,采用区间数学运算法则将机床参数的主动设计最终归结为求取目标函数的全局优化问题,确定了系统结构参数的允许变化范围;最后,通过一个两轴耦合进给系统验证了所提出方法的可行性。
[Abstract]:In order to control the change range of natural frequency of machine tool structure, an active design method of machine tool parameters and its variation range is presented, which realizes the rapid calculation of the allowable range of structural parameters of the system. Firstly, the dynamic joint stiffness parameters are expressed by interval number, and the method of calculating the sensitivity interval of machine tool structure parameters and the calculating method of estimating the range of natural frequency change accurately are given. According to the desired vibration modes and distributions of the system, the active design of machine tool parameters is reduced to the global optimization problem of the objective function by interval mathematical algorithm, and the allowable range of structural parameters of the system is determined. Finally, the feasibility of the proposed method is verified by a two-axis coupled feed system.
【作者单位】： 西安交通大学高端制造装备协同创新中心;
【基金】：国家自然科学基金(51605374)资助项目
【分类号】：TG502.1
，
本文编号：2167360
[Abstract]:In order to control the change range of natural frequency of machine tool structure, an active design method of machine tool parameters and its variation range is presented, which realizes the rapid calculation of the allowable range of structural parameters of the system. Firstly, the dynamic joint stiffness parameters are expressed by interval number, and the method of calculating the sensitivity interval of machine tool structure parameters and the calculating method of estimating the range of natural frequency change accurately are given. According to the desired vibration modes and distributions of the system, the active design of machine tool parameters is reduced to the global optimization problem of the objective function by interval mathematical algorithm, and the allowable range of structural parameters of the system is determined. Finally, the feasibility of the proposed method is verified by a two-axis coupled feed system.
【作者单位】： 西安交通大学高端制造装备协同创新中心;
【基金】：国家自然科学基金(51605374)资助项目
【分类号】：TG502.1
，
本文编号：2167360
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