Collaborative design method of aerodynamic stability and control for modern advanced symmetrical tailless high-speed aircraft

Abstract

Tailless and small control surface design is usually used in the new generation of plane-symmetrical hypersonic vehicle (HSV). However, this design greatly reduced the vehicle's stability and make the vehicle's lateral and directional control seriously coupled. We consider increasing the stability and controllability of the lateral and directional channel while maintaining the lift-drag ratio and other key indicators as a major problem for such HSV. In order to solve this problem, this paper establishes a collaborative design method of aerodynamic stability and control (CDMAC) based on the space criterion diagram (SCD) composed of three core stability parameters. And through the single-state point and multi-state points collaborative design cases of a plane-symmetrical tailless HSV with static instability in lateral and directional channels, it is verified that the CDMAC method can avoid the problem of degradation of key aerodynamic performance such as lift-to-drag ratio and the problem of rudder saturation and inability to track control commands in non-cooperative design. The CDMAC proposed in this paper provides a fast and effective tool for the design of modern advanced symmetrical tailless HSV.