Abstract

This paper studies an automatic carrier landing control problem of fixed-wing aircraft with system uncertainties under the airwake and deck motion disturbances. A robust preview control scheme and an autoregressive (AR) model prediction scheme are originally applied to the automatic carrier landing system (ACLS). The AR model is used to predict the deck motion, which corrects the reference glide slope for relative motion compensation. A novel robust preview control scheme based on the linear matrix inequality (LMI) is proposed for the uncertain nonlinear systems with external disturbances, to make the aircraft track the corrected reference glide slope and reject the airwake disturbance. Simulation results exhibit the better carrier landing performance of the robust preview control scheme than the PID control and robust control schemes.

Highlights

  • Automatic carrier landing is an important issue in the field of the carrier-based aircraft [1]–[3]

  • Autolanding problems can be expressed as that, the trajectory is required to precisely track a reference glide slope and let the aircraft land on a small-size flight deck with 6-DOF motions, under the airwake disturbance caused by the complex marine environment and the aircraft carrier movement

  • SIMULATION STUDY The robust preview control scheme is applied to an F/A-18 nonlinear model to verify the performance of the carrier auto-landing, the control performance of which is verified by comparing with a traditional PID control method and a H2/H∞ robust control method

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Summary

INTRODUCTION

Automatic carrier landing is an important issue in the field of the carrier-based aircraft [1]–[3]. In order to design an efficient ACLS to accuratly track the gliding path with various uncertainties and disturbances, the robust control and the preview control methods are combined for a fixed-wing aircraft. B. THE ROBUST PREVIEW CONTROL SCHEME IS ORIGINALLY APPLIED TO THE AUTOMATIC CARRIER LANDING PROBLEM WITH SYSTEM UNCERTAINTIES AND EXTERNAL DISTURBANCES The traditional ACLSs based on the robust control [6]–[8] and nonlinear control schemes [9]–[12] rarely considered the deck motion compensation and airwake rejection. The proposed robust preview control method aims to improve the automatic carrier landing precision of aircraft with uncertainties induced by the deck motion prediction and airwake information.

PROBLEM FORMULATION
ROBUST PREVIEW CONTROL SCHEME DESIGN
IGC SUBSYSTEM DESIGN
SIMULATION STUDY
SIMULATION PARAMETERS AND CONDITIONS
Findings
CONCLUSION
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