一种举高消防车臂架柔性变形补偿方法  

A flexible deformation compensation method for boom of elevating fire truck

作　　者：滕儒民[1] 方国强[1] 赵哲[1] 董想 沈少石 

机构地区：[1]大连理工大学机械工程学院,大连116024

出　　处：《起重运输机械》2017年第12期98-101,共4页Hoisting and Conveying Machinery

基　　金：辽宁省高校创新团队支持计划(LT2014001)

摘　　要：对于大高度举高消防车,由于臂架系统变形较大,因此在控制上考虑其端部柔性产生的位移十分必要。利用Ansys有限元分析软件APDL参数化建模,求解并提取离散工作空间内所有工况的端部位移,在Matlab中利用三次样条函数拟合得到不同角度下端部位移随伸缩长度变化的变形方程。再通过一次插值的方式得到任意角度下的端部位移变形函数,列出高度偏移等式方程,反求得到补偿高度偏差后的变幅角度。随机选取了三种臂架长度和角度组合工况对比有限元的求解结果,验证了所提出的补偿方法的有效性。Because boom system of great height elevating fire truck is prone to large deformation, it is necessary to consider flexible displacement at its end for better control. APDL parametric modeling is conducted using Ansys finite element analysis software to solve and extract end displacement in discrete working space at all working conditions. Deformation equation of the end displacement varying with expansion length at different angles is fitted with cubic spline function in Matlab. In addition, deformation function of end displacement at any angle is obtained by one time interpolation, and height offset equation is set up to reversely derive luffing angle after height deviation compensation. Three combined working conditions of boom length and angle are selected randomly to compare the results of finite element analysis, proving that the proposed compensation method is effective.

关 键 词：举高消防车 作业空间离散化 APDL建模 三次样条拟合 变形补偿 

分 类 号：U469.68[机械工程—车辆工程]