选用挂轮时目前多采用查表和计算两种方法,而计算法又可分为单纯加减法和辗转相除法,其中心思想都是将挂轮比值i的小数形式按一定方法,化成近似分数形式,从而选取适当的挂轮,但是都较繁琐。下面介绍一种使用普通电子计算器的速算法,能方便、准确、快速地将挂轮比值i的小数形式化成最简近似分数的形式。 Select the use of the current round of the table and look up more than two methods of calculation, and calculation method can be divided into simple addition and subtraction method and removed the division of the law, the heart of the idea is to change the fractional form of the ratio of gear I according to a certain method into approximation Fractional form, so as to select the appropriate hanging wheel, but are more cumbersome. The following describes a speed calculation method using an ordinary electronic calculator, which can conveniently, accurately and quickly form the decimal fraction of the ratio i of the pendulum wheel into the form of the most approximate fraction.