2018/4/27 园上清大华 Overview of Lectures 国上清大学 0.Overview 14/15 Performance(a,b) 16.Aircraft certification 2.Overall configuration 17.Aviation economics weight estimation 18.System integration and configuration management Aircraft Design estimation Fuselage design 19.Multidisciplinary design (飞行器设计) 6/7/8 Aerodynamic design(a,b,c) ootimization .hat and ing 20.Military aircraft design-overview 21.Environmental issues 10.Landing gear and Aircraft systems 22.Desian skills Wenbin Song 11.Power plant School of Aeronautics and Astronautics 12.Stability and control Shanghai Jiao Tong University 13.Loads,materials and structures swb@sjtu.edu.cn oorornenin ong Content 圆上清文大些 Overview 国上清大坐 Overview Stable-natural or artificial Definition and types of stability (static and dynamic) Controllable -position and orientation-flight path Stability analysis Good flying qualities -reduce pilot workloads Aircraft control system Configuration Historical development Sizing of tails using Flight dynamics -Active control system volume coefficients in analysis using 6 DOF Aerodynamics Aircraft flying qualities conceptual designs system Weight and Future trends balances Solution of Propulsion equations of motion Aircraft Linearized equation performance methods Modern feedback control orn enn ong Stability and Control vs Performance Analysis 国圆上清发大坐 Three types of stability 图上活大坐 Aircraft performance Three types of static stability-reflects how the Point of mass assumption aircraft responds to disturbance or pilot inputs -Trajectory is of interests -The tendency of how the aircraft would respond In stability analysis,aircraft is a six-degree-of-freedom (DOF)system,while in performance analysis,aircraft is treated as a mass point. 7777777777 Aircraft stability and control -Body (rigid) unstable Indifferent stability -Orientation aircraft is of more interests Shanghai Tong university-Dr.Wenbin Song 12018/4/27 1 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Aircraft Design （飞行器设计） 1 Wenbin Song School of Aeronautics and Astronautics Shanghai Jiao Tong University swb@sjtu.edu.cn © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Overview of Lectures 0. Overview 1. Introduction 2. Overall configuration 3. Preliminary weight estimation 4. Refined weight estimation 5. Fuselage design 6/7/8 Aerodynamic design(a, b, c) 9. Thrust/Weight ratio and wing loading 10.Landing gear and Aircraft systems 11.Power plant 12.Stability and control 13.Loads, materials and structures 14/15 Performance(a, b) 16.Aircraft certification 17.Aviation economics 18.System integration and configuration management 19.Multidisciplinary design optimization 20.Military aircraft design – overview 21.Environmental issues 22.Design skills © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Content • Overview • Definition and types of stability (static and dynamic) • Stability analysis • Aircraft control system – Historical development – Active control system • Aircraft flying qualities • Future trends 3 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Overview • Stable – natural or artificial • Controllable – position and orientation – flight path • Good flying qualities – reduce pilot workloads 4 Sizing of tails using volume coefficients in conceptual designs Flight dynamics analysis using 6 DOF system Solution of equations of motion Linearized equation methods Aerodynamics Propulsion Aircraft performance Modern feedback control Weight and balances Configuration © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Stability and Control vs. Performance Analysis • Aircraft performance – Point of mass assumption – Trajectory is of interests 5 • Aircraft stability and control – Body (rigid) – Orientation aircraft is of more interests In stability analysis, aircraft is a six-degree-of-freedom (DOF) system, while in performance analysis, aircraft is treated as a mass point. © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Three types of stability • Three types of static stability – reflects how the aircraft responds to disturbance or pilot inputs – The tendency of how the aircraft would respond 6 unstable Indifferent stability stable