Advanced flight control technology achievements at Boeing Helicopters

1994 ◽  
Vol 59 (1) ◽  
pp. 263-290 ◽  
Author(s):  
KENNETH H. LANDIS ◽  
JAMES M. DAVIS ◽  
CHARLES DABUNDO ◽  
JAMES F. KELLER
Keyword(s):  
Flight Control ◽  
Control Technology

Roll aerodynamic characteristics study of an unmanned aerial vehicle based on circulation control technology

2017 ◽  
Vol 233 (3) ◽  
pp. 871-882
Author(s):  
Kun Chen ◽  
Zhiwei Shi ◽  
Jiachen Zhu ◽  
Haiyang Wang ◽  
Junquan Fu
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Flight Control ◽  
Attitude Control ◽  
Aerodynamic Force ◽  
Flight Test ◽  
Scale Model ◽  
Maximum Efficiency ◽  
Control Technology ◽  
Circulation Control ◽  
Aerial Vehicle

To explore the control efficiency of circulation flow control technology, a circulation control actuator with an independent gas source has been designed and applied in roll attitude control of a small unmanned aerial vehicle. The circulation control devices are arranged at the two ends of the wing on an unmanned aerial vehicle scale model, the changes in aerodynamic force and aerodynamic moment caused by turning on the actuator are measured in a wind tunnel, and the flow field characteristics are analysed using particle image velocimetry technology. The flight control effect of the roll attitude is verified via a flight test. Experimental and flight test results show that the control of roll attitude can be achieved by turning on the circulation control actuator on one side, and the maximum efficiency that the circulation control generates is equivalent to 8° aileron deflection with production of a favorable yaw moment to achieve a coordinated turn. The circulation control actuator can increase lift and reduce drag when opened on both sides simultaneously. The maximum lift-to-drag ratio of the UAV increased from 5 to 9, and this approach can also suppress flow separation and delay stall at high angles of attack. The aileron or trailing edge flaps can be replaced with circulation control actuators, and the circulation control technology can also be applied to aerodynamic performance improvement and flight control in other types of aircraft.

scholarly journals Survey on Flight Control Technology for Large-Scale Helicopter

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Jinshuo Hu ◽  
Hongbin Gu
Keyword(s):  
Flight Control ◽  
Large Scale ◽  
Control Technology ◽  
Flight Control System ◽  
Future Directions ◽  
Research Issues ◽  
Advantages And Disadvantages ◽  
Helicopter Flight ◽  
Challenging Research ◽  
Theoretical Developments

A literature review of flight control technology is presented for large-scale helicopter. Challenges of large-scale helicopter flight control system (FCS) design are illustrated. Following this, various flight control methodologies are described with respect to their engineering implementation and theoretical developments, whose advantages and disadvantages are also analyzed. Then, the challenging research issues on flight control technology are identified, and future directions are highlighted.

Carefree Handling Systems for Helicopters

1992 ◽  
Vol 206 (1) ◽  
pp. 37-46 ◽  
Author(s):  
C P Massey
Keyword(s):  
Control Systems ◽  
Active Control ◽  
Flight Control ◽  
Control Technology ◽  
Visual Displays ◽  
Tactile Cues

A programme of work is being undertaken with the aim of defining features to help the pilot respect the helicopter's numerous flight limitations, reducing the workload and enhancing mission performance. Carefree handling features that have been studied include visual, audible and tactile cues and direct intervention methods. These features have been evaluated in a series of piloted simulation trials at DRA Bedford. Most of the work to date has been based around helicopters with active control technology (ACT) flight control systems, but conventionally controlled helicopters have also been considered. Results from the programme suggest some benefits for head-up visual displays, tactile and audible cues, with more significant benefits for the direct intervention methods. A combination of these features allows the pilot to use the full performance of the vehicle without exceeding limits and at low pilot workload.

Analysis of safety implications for SJA-based robust UAS flight control technology

2015 ◽  
Author(s):  
Vladimir Golubev ◽  
Petr Kazarin ◽  
William MacKunis ◽  
Sherry Borener ◽  
Derek Hufty ◽  
...  
Keyword(s):  
Flight Control ◽  
Control Technology
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