Technical Overview

The On-Board Computer (OBC) is a critical subsystem of modern missile systems, serving as the central processing and control unit responsible for mission management, communication, guidance, and system coordination. In the Next Generation Anti-Radiation Missile (NGARM), the OBC is integrated into the Store Avionics and acts as the primary interface between the missile and the host aircraft.

The OBC communicates with various aircraft subsystems, including the Mission Computer, Master Inertial Navigation System (INS), and Display Computer, to receive mission data, pilot commands, and navigation information. It also interfaces with several onboard missile subsystems such as the Fiber Optic Gyroscope (FOG)-based INS, RF Seeker, Altimeter, Two-Way Data Link (TWDL), Telemetry System (TM), Engine Control Unit (ECU), Programmable Impact Delay Fuse (IDF), System Relay Box (SRB), Linear Electro-Mechanical Actuation (LEMA), and Rotary Electro-Mechanical Actuation (REMA)

During the pre-release phase, the OBC performs pilot authentication, release-related initialization, and range basket communication with the aircraft. Following missile release, it executes mission sequencing, guidance and control algorithms, navigation processing, and communication with onboard subsystems to ensure accurate target engagement and mission completion. The OBC is built around an ARM Cortex-A9 processor, providing high computational performance, real-time processing capabilities, and reliable communication through multiple high-speed interfaces. Its robust architecture enables deterministic operation in demanding defense environments.