Adjoint analysis of mixed continuous/discrete systems in simulink

The adjoint simulation method is a well established and efficient tool for gaining insight and understanding of key parameters affecting the behaviour and performance of a guided missile homing system. Traditionally, the method has been employed by various missile companies during the preliminary and conceptual stages of new missile programs. A software package, called COVAD, was developed recently to facilitate implementation of the adjoint method within a MATLAB/Simulink environment. However, at present, COVAD accommodates continuous dynamic systems only. In order to extend the capability of COVAD to discrete and hybrid systems, investigations were carried out to determine the method of approach in Simulink and resolve any implementation issues. The purpose of this paper is to report on these investigations. Several examples are included to illustrate the proposed method within the MATLAB/Simulink environment. © 2010 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved