Engine Yaw Augmentation for Hybrid-Wing-Body Aircraft via Optimal Control Allocation Techniques

Abstract

Asymmetric engine thrust was implemented in a hybrid-wing-body non-linear simulation to reduce the amount of aerodynamic surface deflection required for yaw stability and control. Hybrid-wing-body aircraft are especially susceptible to yaw surface deflection due to their decreased bare airframe yaw stability resulting from the lack of a large vertical tail aft of the center of gravity. Reduced surface deflection, especially for trim during cruise flight, could reduce the fuel consumption of future aircraft. Designed as an add-on, optimal control allocation techniques were used to create a control law that tracks total thrust and yaw moment commands with an emphasis on not degrading the baseline system. Implementation of engine yaw augmentation is shown and feasibility is demonstrated in

Influences of airfoil profile on lateral-directional stability of aircraft with flying wing layout

“…In recent years, the flying wing layout has become the research hotspot in the world (Zhou and Liu, 2015). In Davidson (2004), Whittenbury (2011) and Alsahlan and Rahulan (2017), several unmanned aerial vehicles with flying wing layout are presented; in Liebeck (2004), Guo et al (2014) and Taylor and Yoo (2011) research studies have been conducted on manned vehicle with flying wing layout; in Li et al (2014), Hunten et al (2007) and Lei and Lixin (2012), it has been widely studied on aerodynamic performance, structural characteristics and flight control system of flying wing aircraft; in Minghang and Hu (2014), Pate and German (2014) and Pan et al (2017), research studies have been carried out on application of multidisciplinary design optimization method in conceptual design of such aircraft.…”