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本文基于数学机械化方法和计算机符号处理技术，对平面三环复杂机构的位置分析进行了符号法求解，该法成功地将一组非线性多项式方程化简为一组等价的三角化方程，导出了单变量的２４ 次代数方程，符号推导和符号运算借助于计算机代数系统ＲＥＤＵＣＥ 完成，并给出一个数字实例说明这种方法。
Based on mathematical mechanization method and computer symbol processing technology, the position analysis of the planar tricyclic complex mechanism is solved symbolically. This method successfully reduces a set of nonlinear polynomial equations into a set of equivalent triangular equations and derives The univariate 24th algebraic equations, symbolic derivation and symbolic computation are done by means of the computer algebra system REDUCE and a numerical example is given to illustrate this method.