Continuous non-smooth approach based terminal guidance law with extended state observer

摘要

In this paper terminal guidance law considering uncertain factors for flight vehicle is investigated. In order to improve the terminal guidance accuracy, continuous non-smooth control theory based nonlinear guidance law which can make the states converge in finite time is derived. Then a finite-time convergence extended state observer is introduced into the control system for compensating the uncertainties in it. With the aid of numerical simulation, it demonstrates the effectiveness of the approach to yield better terminal accuracy in the presence of abrupt disturbance.