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组合设计法是一种新型的试验设计方法,它是采用了正交和回归方法相结合,使试验次数减少,而同样能得到充分的信息的方法。众所周知,在切削试验方面,最初大多是采用单因素试验法,这种方法是把影响切削速度的诸因素孤立起来,结果不但使试验次数增加,既费时又费料,而且无法表示出各因素间的交互作用,影响试验结果的精确性。后来出现了所谓的正交试验设计,虽然它克服了上述单因素试验的缺点,但当要考虑交互作用和高次效应时,试验次数仍然是很多的。例如要进行一项四因素三水平的试验,用单因数试验需要3~4=81次,采用正交试验设计至少也要L_9(3~4)=9次,若考虑到因素间的交互作用和高次效应时,
Combinatorial design method is a new type of experimental design method, which is a method that combines orthogonal and regression methods to reduce the number of experiments and also obtain sufficient information. As we all know, in the cutting test, the initial single-factor test is mostly used. In this method, the factors that affect the cutting speed are isolated. As a result, not only the number of tests is increased, but it is time-consuming and costly, Of the interaction, affect the accuracy of test results. Later, the so-called Orthogonal Design, which overcomes the shortcomings of the single-factor experiments described above, is still quite numerous when considering interactions and high-order effects. For example, to carry out a four-factor, three-level test, using a single factor test requires 3 ~ 4 = 81 times, using orthogonal design at least L_9 (3 ~ 4) = 9 times, taking into account the interaction between factors And high-order effect,