Second-Order Sliding Mode Guidance Law considering Second-Order Dynamics of Autopilot

• Published in: Journal of Control Science and Engineering Vol. 2019; no. 2019; pp. 1 - 11
• Main Authors: Zhang, Kuanqiao, Yang, Suochang
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 01.01.2019; Hindawi; John Wiley & Sons, Inc; Hindawi Limited
• Subjects: Aeronautics; Aerospace engineering; Angle of attack; Automatic pilots; Control theory; Convergence; Convergence (Social sciences); Design; Dynamic characteristics; Guidance (motion); Guided missiles; Impact angle; Laws, regulations and rules; Missiles; Rockets (Ordnance); Sliding mode control; Beijing China
• ISSN: 1687-5249; 1687-5257
• DOI: 10.1155/2019/8573140

Aiming at the requirement that some missiles need to meet certain impact angles when attacking targets, we consider the second-order dynamic characteristics of autopilot, thereby proposing a second-order sliding mode guidance law with impact angle constraint. Firstly, based on the terminal sliding mode control, we design a fast nonsingular terminal sliding mode guidance law with impact angle constraint. Based on the second-order sliding mode control, a second-order sliding mode guidance law with impact angle constraint is proposed. We have proved its finite time convergence characteristics and presented the specific convergence time expression. Subsequently, the dynamic characteristics of the autopilot are approximated to the second-order link. Combined with the dynamic surface control theory, we proposed a second-order sliding mode guidance law considering the second-order dynamic characteristics of the autopilot and proved its finite-time convergence characteristics. Finally, the effectiveness and superiority of the proposed guidance law are verified by comparative simulation experiments.