With the rate limiting element in man machine closed loop system, we analyse the PIO using the method of describing function.
然后将速率限制环节置于人机闭环系统中，利用描述函数法对驾驶员诱发振荡（ PIO）机理进行了研究。
Theory of solving the response function by boundary element method is discussed.
旨在探讨用边界元法求解响应函数的理论方法。
Adopting geometric method, the rational function interpolation is constructed on polygonal element.
采用几何的方法构造出多边形单元上的有理函数插值。
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