کنفرانس مهندسی برق ایران

صفحه اصلی / سی و یکمین کنفرانس بین المللی مهندسی برق

An Improved Nonlinear Observer-Based Integrated Guidance and Control for Hypersonic Flight Vehicle with Angle Constraints

نویسندگان :

Seyedeh Mahsa Zakipour Bahambari¹ Saeed Khankalantary²

1- Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran 2- Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran

کلمات کلیدی :

Integrated Guidance and Control،Nonlinear Disturbance Observer،Target Interception،Dynamic Surface Control

چکیده :

In this paper, an improved integrated guidance and control (IGC) design method for nonlinear uncertain hypersonic flight vehicle (HFV) with angle constraints is presented based on adaptive block dynamic surface control scheme, backstepping method, and a multivariable nonlinear disturbance observer (NDOB) in three-dimensional space. Initially, the six degree of freedom (6DOF) integrated guidance and autopilot dynamic model is organized using the combination of HFV dynamic model and HFV-target relative motion model whereas the aerodynamic and model uncertainties, the cross-coupling effects, and disturbances are considered. In order to apply the nonlinear disturbance observer- based control (NDOBC) method, a multivariable chattering free NDOB is used to estimate the lumped uncertainties in the established integration and autopilot model. It should be noticed that an adaptive block dynamic surface control approach in combination of backstepping method is presented to achieve the high performance in the target interception, states regulation, and regulation of azimuth and elevation angles related to the line of sight (LOS). Closed- loop stability, estimation errors convergence to zero, and states regulation are proven based on the Lyapunov theory. Finally, the simulation results confirm the effectiveness of presented NDOBC not only in closed-loop stability but also in high-performance target interception using the smooth control input