A calculation method and a program description for analysis of the small disturbance stability and synthesis of stabilizers (PSS) of multimachine 'power systems are presented.

Computer simulation shows that the control of fuzzy variable structure can increase the robustness, solve the problem of shiver at high frequency, and improve the stability of small disturbance.

But if initial deflection is small and in the designed range of the pavement structures, it'd better not grout or the plate stability will be impacted by disturbance caused by grouting.