[1] PAPACHRISTOS C,ALEXIS K,TZES A.Design and experimental attitude control of an unmanned tilt-rotor aerial vehicle［C］//IEEE International Conference on Advanced Robotics,2011:465-470.

[2] SATO M,MURAOKA K.Flight controller design and de-monstration of quad-tilt-wing unmanned aerial vehicle［J］.Journal of Guidance,Control & Dynamics,2014,38(6):1-12.

[3] ONER K T,CETINSOY E,UNEL M,et al.Dynamic mo-del and control of a new quadrotor unmanned aerial vehicle with tilt-wing mechanism［C］//Proceedings of World Academy of Science,Engineering & Technology,2008:58-63.

[4] FLORES G,LUGO-CARDENAS I,LOZANO R.6-DOF hovering controller design of the quad tiltrotor aircraft:simulations and experiments［C］//Proceedings of the IEEE Conference on Decision and Control,2014:6123-6128.

[6] TENG W F,PAN H P,REN J.Neural network PID decoupling control based on chaos particle swarm optimization［C］//The 33th Chinese Control Conference,2014:5017-5020.

[7] PENG C,WANG X M,CHEN X.Design of tiltrotor flight control system in conversion mode using improved neural network PID［J］.Advanced Materials Research,2014, 850/851:640-643.

[10] SONG Y G,WANG H J.Design of flight control system for a small unmanned tilt rotor aircraft［J］.Chinese Journal of Aeronautics,2009,22(3):250-256.

[11] ZHANG J,SUN L G,QU X J,et al.Time-varying linear control for tiltrotor aircraft［J］.Chinese Journal of Aeronautics,2018,31(4):632-642.

[14] SONG S Y,WANG W H,LU K,et al.Nonlinear attitude control using extended state observer for tilt-rotor aircraft［C］//The 27th Chinese Control and Decision Confe-rence,2015:852-857.