With the rapid advancement of aerospace technology, modern aircraft are becoming increasingly reliant on guidance, navigation, and flight management systems. Ensuring accurate design, validation, and performance evaluation of such complex avionics systems is essential for technological innovation. To address this demand, the Four-Dimensional Avionics Guidance and Verification Integrated Simulation Solution has been developed—an advanced avionics simulation platform that combines real-time performance, high reliability, and scalable architecture.

At its core, the system is built on a distributed real-time simulation framework, powered by an HRT hardware-in-the-loop simulation platform and the VxWorks real-time operating system. Together with high-performance processors, it provides a robust environment for executing control law target codes in real time. The solution supports full-digital simulations, hardware-in-the-loop testing, and closed-loop integrated experiments, covering the entire spectrum from conceptual validation to engineering verification. Equipped with 10 simulation machines and a triple-redundant structure of 3 integrated navigation simulators, the platform ensures reliability and adaptability for demanding aerospace applications.

The system’s functionality highlights both flexibility and integration. First, it supports Matlab/Simulink modeling and model-based design, allowing for fast system prototyping and automatic target code generation, while also enabling Stateflow-based modeling for single-rate/multi-rate and single-task/multi-task real-time codes. Second, its distributed real-time simulation capability allows users to decompose an overall system model into distributed sub-models, each executed independently on different CPUs with optimized step size, integration algorithms, and scheduling modes. Third, the system offers extensive avionics interface support, including ARINC429 and ARINC664, with real-time data forwarding between networks via RDC devices—ensuring seamless compatibility with both current and next-generation avionics architectures.

From a simulation and visualization perspective, the solution integrates Vega Prime for high-fidelity 3D flight scene simulation, covering a terrain scale of 4000km × 4000km. It enables complete reproduction of flight phases from runway taxiing to takeoff, cruise, and landing. Complementing this, GL Studio powers the cockpit display and control simulation, offering digital flight instrument displays, flight planning management, fault management, and flight/navigation status monitoring. A ground-based air traffic simulation system interacts with cockpit modules via RF data link, dynamically calculating and visualizing deviations between actual and planned flight paths.

The system also supports hardware-in-the-loop (HIL) simulation through real hardware I/O interfaces, enabling functional substitution and validation with prototype avionics devices under near-operational conditions. Its user-friendly human–machine interface allows unified management of distributed simulation machines, providing features such as target code generation, runtime control, online parameter tuning, and model monitoring. Even under complex experimental conditions, the system maintains efficient and stable operations.

With these features, the Four-Dimensional Avionics Guidance and Verification Integrated Simulation Solution is highly applicable across multiple domains: hardware-in-the-loop laboratories for guided weapon systems, radar and multi-spectral seeker testing, inertial and satellite navigation simulation, as well as three-dimensional trajectory and flight visualization for guided munitions. It provides researchers and engineers with a realistic and reliable testing environment, while serving as a powerful platform for innovation in next-generation aerospace technologies.