Hardware‑in‑the‑Loop Validation for Full Authority Digital Engine Control (FADEC) Systems

White Paper: Power

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Testing mission‑critical FADEC systems demands precision, repeatable environments, and reliable tools. Our white paper, "Hardware‑in‑the‑Loop Validation for Full Authority Digital Engine Control (FADEC) Systems," developed in partnership with OPAL‑RT, presents proven techniques to reduce risk, enhance accuracy, and streamline FADEC verification for aerospace applications.

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Overview

The white paper, a joint effort by Pickering Interfaces and OPAL‑RT Technologies, details a scalable Hardware‑in‑the‑Loop (HIL) solution designed to validate and verify Full Authority Digital Engine Control (FADEC) systems. FADECs are the embedded controllers that govern every aspect of engine performance in modern commercial and military aircraft, delivering optimal efficiency, reliability, and reduced pilot workload.

HIL simulation emerges as a certifiable, high‑fidelity validation strategy. By integrating real‑time simulation, advanced sensor and load emulation, and comprehensive communication‑bus validation, the platform replicates real‑world operating conditions with precision. This ensures that FADEC functionality is rigorously tested under a wide spectrum of scenarios, meeting the stringent safety demands of the aviation sector.

The document outlines key FADEC components—sensor inputs, actuator outputs, and communication buses such as ARINC 429 and AFDX—that enable seamless data exchange between the FADEC and other avionics. It also clarifies the distinctions among Electronic Engine Controls (EECs), Digital Engine Controls (DECs), and FADECs, underscoring why full‑authority systems require the most exhaustive testing.

FADECs must satisfy the highest certification standards, including DO‑178C for software and DO‑254 for hardware. The white paper demonstrates how the HIL framework supports compliance, offering repeatable test cases, traceable results, and robust integration with existing development workflows.

In summary, this white paper delivers a comprehensive overview of the Pickering‑OPAL‑RT HIL solution, highlighting the critical role of real‑time simulation and exhaustive testing in safeguarding the reliability and safety of modern aircraft engines. By adopting these advanced HIL methodologies, aerospace developers can accelerate FADEC development while maintaining the industry’s uncompromising standards.