**Adaptive Robust Guidance Scheme Based on the Sliding Mode Control in an Aircraft Pursuit-Evasion Problem** Adaptive Robust Guidance Scheme Based on the Sliding Mode Control in an Aircraft Pursuit-Evasion Problem

DOI: 10.5772/intechopen.72177

Jian Chen, Yongjun Zheng, Yuan Ren, Yuan Tian, Chen Bai, Zhang Ren, Guangqi Wang, Nannan Du and Yu Tan Jian Chen, Yongjun Zheng, Yuan Ren, Yuan Tian, Chen Bai, Zhang Ren, Guangqi Wang, Nannan Du and Yu Tan

Additional information is available at the end of the chapter Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.72177

#### Abstract

In this chapter, a robust guidance scheme utilizing a line-of-sight (LOS) observation is presented. Initial relative speed and distance, and error boundaries of them are estimated in accordance with the interceptor-target relative motion kinematics. A robust guidance scheme based on the sliding mode control (SMC) is developed, which requires the boundaries of the target maneuver, and inevitably has jitter phenomenon. For solving abovementioned problems, an estimation to the target acceleration's boundary is developed for enhancing robustness of the guidance scheme and the Lyapunov stabilization is analyzed. The proposed robust guidance scheme's brief characteristic is to reduce the effect of relative speed and distance, to reduce the effect of target maneuverability on the guidance precision, and to strengthen the influence of line-of-sight angular velocity. The proposed scheme's performances are validated by the simulations of different target maneuvers under two worst-case conditions.

Keywords: robust guidance scheme, line-of-sight angular velocity, sliding mode control, boundary of target maneuver, Lyapunov stability
