Local pointwise error estimate of modified method of characteristics 修正特征线有限元法的局部逐点误差估计
This method yielded very promising results on precision pointing tasks , and is also applicable to the slewing task . pointing errors of less than 0 . 05 degrees were achievable with off - line nominal control computation 该算法用于飞行器的精点控制可获得满意的效果,也可用于完成飞行器的旋转控制任务,例如该算法用于飞行器的精点控制可使点误差小于0 . 05度。
Nowadays , the machining center carries through the precision inspection only following the fixed coordinates " axes , which can not completely reflects the real error of the spacial position of the practical machining outside the axes and leads to having no the directive relation between the inspected precision and the practical machining precision . so , this paper introduces that the error factors of influencing workpiece ' s outline on machining and carries out the solid inspection of every spot ' s error inside the workaround on the horizontal machining center 本文针对当前加工中心仅沿固定的坐标轴线进行精度(含几何精度和定位精度)检验,并不完全反映轴线外实际加工的空间位置真实误差,导致检出精度与机床实际加工精度无直接对应关系的现状,论述了加工时影响工件型面轮廓精度之加工中心的误差因素,对加工中心实施其工作区内各点误差的立体检测。
点: drop误差: error弹着点误差: impact error零点误差: error of zero; zero error; zero field operation; zero offset; zero point error; zero shift; zero-error终点误差: end point error转向点误差: turning point errors点误差指示器: spot error indicator平均弹着点误差: mean point of impact error误差: error 平均误差 mean error; average error; 仪器误差 instrumental error; 概然误差 probable error; 行星观测上位置与计算上位置间的误差 the error of a planet; 误差极微的精密零件 precision parts with very close tolerances; 误差不超过千分之三毫米 with a tolerance of less than three-thousandths of a millimetre; 误差分析 error analysis; 误差概率 probability of error; 误差估计 error estimate; 误差函数 error function; 误差量 extent of error; 误差率 error rate β误差: type ii error带误差: tape errors滴误差: drop error第误差: control error; control swing多误差: multiple error◇多误差校正码 multiple-error-correcting code负误差: negative error恒误差: constant error碱误差: alkali error; alkaline error; alkaloid error角误差: angle error; angular divergence; misalignment◇角误差检测器 angle-error detector; 角误差灵敏度 angle-error sensitivity; 角误差显示器 angular error indicator径误差: multipath error零误差: zero error; zero-error码误差: code error钠误差: sodium error alkaline error偏差,误差: deviation全误差: total error色误差: chromatic error