title: Guidance laws with input saturation and nonlinear robust H∞ observers.
abstract: A novel three-dimensional law based on input-to-state stability (ISS) and nonlinear robust H∞ filtering is proposed for interception of maneuvering targets in the presence of input saturation. A dead zone operator model is introduced to design an ISS-based guidance law to guarantee robust tracking of a maneuvering target. Input saturation and system stability are considered simultaneously, and the globally input-to-state stability have been ensured in theory. Since in practice line-of-sight (LOS) rate is difficult for a pursuer to measure accurately, the nonlinear robust H∞ filtering method is utilized to estimate it. The stability analyses and performed simulation results show that the presented approach is effective.
authors.affiliation: China Aerodynamics Research & Development Center, China. Electronic address: liaofeiwy@gmail.com.
authors.forename: Fei
authors.initials: F
authors.lastname: Liao
authors.affiliation: Department of Automation, University of Science and Technology of China, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Luo
authors.affiliation: Department of Automation, University of Science and Technology of China, China.
authors.forename: Haibo
authors.initials: H
authors.lastname: Ji
authors.affiliation: Department of Automation, University of Science and Technology of China, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Gai
keywords: Guidance and control; ISS; Input saturation; Nonlinear Robust  Filtering