2018/4/27 Development of Aircraft Control Systems(B) 国上活大坐 Development of Aircraft Control Systems(C) 国上清大学 B:there still exists a direct mechanical link,but C:no direct mechanical link used enhanced by a servomotor ·Features: ·Features: Reduced force felt by pilot pilot force feel provided by a separate component Development of Aircraft Control F/A-18A Flight Control System-top Systems (D) 圆上活文通大孝 level data flow 圈上活大整 D:Electrical signals used in the control ·Features Computers and sensors -Improve performance Further developed into fly-by-wire system used today Fly-by-Wire System 图上洋大峰 Active Control Technology 图上活大坐 ·Fly-by-wire system Also known as CCV(control configured vehicle) Initially used on military aircraft,such as by F16,Space ·Used to provide shuttle,X-29,J-10, Artificial stability Then extended onto civil aircraft,by A320,B737NG, -Direct force control A380,ARJ-21* -Has become a common design nature for modern -Better gust load control capability,etc. aircraft ·Aims are to -Features: -Improve aircraft performance ·Simple architecture -Increase the operational boundary ·Flexible Enabling the relaxation of static stability But,mechanical backup channel often used erslty-Dr.V(enbin Song 62018/4/27 6 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Development of Aircraft Control Systems (B) • B: there still exists a direct mechanical link, but enhanced by a servomotor • Features: – Reduced force felt by pilot 31 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Development of Aircraft Control Systems (C) • C: no direct mechanical link used • Features: – pilot force feel provided by a separate component 32 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Development of Aircraft Control Systems (D) • D: Electrical signals used in the control • Features – Improve performance – Further developed into fly-by-wire system used today 33 Computers and sensors © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics F/A-18A Flight Control System – top level data flow 34 Ref: A knowledge-based system design/information tool for aircraft flight control systems © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Fly-by-Wire System • Fly-by-wire system – Initially used on military aircraft, such as by F16, Space shuttle, X-29, J-10, – Then extended onto civil aircraft, by A320, B737NG, A380, ARJ-21* – Has become a common design nature for modern aircraft – Features: • Simple architecture • Flexible • Enabling the relaxation of static stability • But, mechanical backup channel often used 35 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Active Control Technology • Also known as CCV (control configured vehicle) • Used to provide – Artificial stability – Direct force control – Better gust load control capability, etc. • Aims are to – Improve aircraft performance – Increase the operational boundary 36