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Hardware-In-Loop Simulation (HILS) is the only platform where the dynamics of the subsystem is tested and onboard software is validated in real time environment before the flight trial. The flight systems consist of navigation, guidance and control. The Inertial Navigation system (INS) which is embedded system is sending the required navigation information for the guidance and control algorithm which resides in on-board computer-OBC (embedded system). The plant model is used to create environment near flight condition and to validate guidance and control as well as navigation. The newly developed navigation package based on MIL-STD 1553 communication protocol introduced in HILS for total trajectory dynamics validation in different phases. Firstly the navigation algorithm resided in INS isvalidated and the sensors i.e. gyros are excited in next step to test for delays, and non linearity. The total methodology adopted for the testing of the navigation package-INS is presented in this paper.

Hardware-In-Loop simulation (mLS) is the onl y platform used to validate the on-board software for aerospace applications along with the other flight subs y stems. HILS s y stem should be capable of high speed data acquisition, integration with traditional interface protocols to latest technolog y based interfaces. PCIIISA based computer s y stem is onl y able to integrate with limited 110 resources and limited speed. Compact Peripheral Interface (cPCI) protocol is superset of PCI architecture which follows state-of-the art technolog y that significantl y eases the s y stem design task, shortening the design c y cle, time-to-market and robust mechanical form factor than desktop computer. This paper provides technical overview of the cPCI s y stem for mLS and real time modeling and simulation software development. Total integration c y cle of the s y stem under HILS environment and testing with each HILS configuration is also explained.

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