The issue of synthesizing steady-state and transient-state control laws for a turbofan engine was studied.Firstly
a number of steady-state point PI(proportional integral) controllers were designed using root locus analysis and time domain method from ground idle power to take-off power
and furthermore full flight envelope controllers were designed using interpolation method and corrected parameters.Secondly
the synthesis control system was acquired by integrating schedule-based transient control and steady-state control through max/min logic into which an anti wind-up module was added to cope with the influence of integrator wind-up.Finally
the synthesis control system was validated in software MATLAB/Simulink.The results indicate that the synthesis control system has the following advantages:(1) during steady-state
the anti-disturbance quality is good;(2) during transient-state
the response curve is flat;(3) the system uses a variety of restrictions effectively with both anti-windup and smooth switching functions.