The invention discloses a PIlambdaDmu controller parameter setting method based on a parameter stability domain. The method includes the following steps: judging if the input and the output of a controller
system are stable, then determining parameter stability domain boundary curves at
phase margin upper limit and at the position of
phase margin appearing, determining a value range of two boundary curve frequency on the condition of ensuring parameters with practical significance, confirming the range of parameter Ki and Kp in the stability domain on the boundary curve, inserting a plurality of points on two boundary curves, determining a plurality of groups of points which are equal in Kp value respectively on the two boundary curves, obtaining a value range of Ki corresponding to the plurality of groups of points, determining an optimum value of Ki corresponding to each group of points by adopting a
genetic algorithm, and finally determining an optimal solution through integral time absolute error (ITAE). According to the PIlambdaDmu controller parameter setting method based on the parameter stability domain,
stable phase margin of a
system and dynamic characteristics are both considered, and controller parameters are set by means of the
genetic algorithm. A controller which is set by using the method can
well control a
system on the condition of meeting given
stable phase margin, and therefore the fact that a system has better dynamic characteristics is guaranteed.