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在用电子计算机来演算有关渐开线齿轮啮合问题时,可能遇到要求从渐开线函数inva倒过来查取角度a值的需要。这时,可以按照下式编制标准子程序。 (1) 其中关系式J(inva)可按计算精度要求从(2)式(3)式中选用。 (一) 一般精度要求时用的关系式 J(inva)=c_0+q(c_1+q(c_2+q(c_3+qc_4))) (2) 其中 q=(inva)~(2/3) c_0=1.000002 c_1=1.039924 c_2=0.325677 c_3=-0.007181 c_4=-0.003318 当a<53°(亦即inva<0.43)时,计算精度不低于3·10~(-6);当a<64°(相应于inva<
When calculating the involute gear meshing problem with a computer, you may encounter the need to look up the angle a value from the involute function inva. At this time, standard subprograms can be programmed as follows. (1) Wherein J (inva) according to the calculation accuracy requirements from (2) (3) type selection. (A) The relational expression for general accuracy requirements is as follows: (inva) = c_0 + q (c_1 + q (c_2 + q (c_3 + qc_4))) = 1.000002 c_1 = 1.039924 c_2 = 0.325677 c_3 = -0.007181 c_4 = -0.003318 When a <53 ° (ie inva <0.43), the calculation accuracy is not less than 3 · 10 -6; when a <64 ° Corresponds to inva <