Abstract:A sliding mode controller based on fuzzyPID approaching law for aeroengine with strong nonlinearity is designed, PID approaching law enables 3 parameters to set the approaching process into different parts to control, and enhance the approaching speed and suppress chattering. The fuzzy theory realizes PID approaching law’s three parameters of dynamic adaptive adjustment, further improves chattering reduction effect. H response time of fuzzyPID approaching law controller is 0.92 s less than that of the constant speed approaching law, and is 0.11 s more than that of the fixedPID approaching law, and the steadystate error reduce by 6.89×10-5and 1.68×10-5respectively compared to other two kinds of controller respectively.πT response time of fuzzyPID approaching law controller is 0.56 s less than that of the constant speed approaching law, and is 0.23 s more than that of the fixedPID approaching law, and the steadystate error reduces by 6.38×10-6and 6.11×10-7respectively compared to other two kinds of controller respectively. By contrast, the sliding mode controller based on fuzzyPID approaching law for aeroengine is better in suppressing chattering than other controller, the impact of quickness is not large, and proving the validity of this controller.