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--- en:safeav:ctrl:testing [2026/03/26 13:15] – airi
+++ en:safeav:ctrl:testing [2026/04/23 11:27] (current) – [Cross-Domain Insight] raivo.sell
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 </figure>
+Airborne testing combines **ground-based facilities and open-air test ranges**. Wind tunnels (e.g., NASA Ames Research Center Wind Tunnel) provide controlled aerodynamic testing across regimes, while **iron-bird rigs** and avionics labs enable hardware/software integration before flight. Actual flight testing occurs at restricted ranges such as Edwards Air Force Base or FAA-designated UAV corridors, where telemetry, radar tracking, and chase aircraft ensure safety. Compared to ground systems, **repeatability is lower**, and environmental factors (weather, airspace constraints) play a larger role, but the combination of lab + flight test provides a structured certification pathway.
+<figure Ref.figure6.12c>
+{{:en:safeav:ctrl:figure6.12c.jpg?600|}}
+<caption>Marine Systems (Surface & Underwater)</caption>
+</figure>
+Marine testing relies on a mix of **controlled hydrodynamic facilities and open-water trials**. Towing tanks and wave basins—such as those at Naval Surface Warfare Center—allow precise study of hull performance, propulsion, and wave interaction. For autonomy, sheltered environments (harbors, test lakes) are used for early-stage validation, followed by coastal and deep-sea trials. Facilities often include instrumented buoys, GPS-denied navigation testing zones, and long-duration endurance setups. Compared to ground and air, marine systems emphasize **disturbance realism (waves, currents)** and **long-horizon reliability**, with less focus on dense, repeatable interaction scenarios.
+<figure Ref.figure6.12d>
+{{:en:safeav:ctrl:figure6.12d.jpg?600|}}
+<caption>Space Systems (Launch, Orbital, Deep Space</caption>
+</figure>
+Space systems have the most specialized and constrained physical testing infrastructure. Because full end-to-end testing in the operational environment is impossible, engineers rely on **high-fidelity ground facilities** that replicate aspects of space conditions. These include thermal vacuum chambers (e.g., NASA Johnson Space Center Chamber A), vibration and acoustic test facilities for launch loads, and propulsion test stands (e.g., Stennis Space Center). RF anechoic chambers validate communication and sensing systems. While these facilities achieve extreme fidelity for specific physics, **system-level validation is fragmented**, requiring heavy reliance on simulation and incremental subsystem testing. The cost and irreversibility of failure drive a test philosophy centered on qualification, redundancy, and conservative margins.
+===== Cross-Domain Insight =====
+Across all four domains, physical testing evolves from **highly repeatable, scenario-rich environments (ground)** to **physics-constrained, partial-reality validation (space)**. Airborne and marine systems sit in between, blending controlled facilities with real-world trials. A consistent trend is the integration of **instrumented test environments with digital twins**, enabling bidirectional feedback between physical experiments and simulation models—an increasingly critical capability for validating autonomous and safety-critical systems.
-^ # ^ Project Title ^ Description ^ Learning Objectives ^
-| 1 |Classical vs AI Control Benchmark Study | Implement and compare a classical controller (e.g., PID or LQR) with an AI-based controller (e.g., reinforcement learning) for a simplified vehicle model in simulation. Evaluate performance under nominal and disturbed conditions. |- Understand differences between model-based and data-driven control \\ - Analyze stability, robustness, and interpretability trade-offs \\ - Evaluate controller performance under uncertainty and disturbances |
-| 2 |Behavioral & Motion Planning Stack Design | Design a hierarchical autonomy stack that includes a behavioral layer (FSM or behavior tree) and a motion planner (A*, RRT*, or MPC). Apply it to a scenario such as lane change or obstacle avoidance. |  * Distinguish between behavioral decision-making and motion planning \\  * Implement planning algorithms under constraints \\  * Understand integration between perception, planning, and control |
-| 3 |Scenario-Based Validation Framework | Develop a scenario-based testing framework using parameterized scenarios (e.g., varying speeds, distances, agent behaviors). Use a simulator to evaluate planning/control performance across these scenarios. |  * Apply design-of-experiments (DOE) to autonomy validation \\  * Define and measure safety metrics (e.g., TTC, collision rate) \\  * Understand coverage and edge-case testing challenges |
-| 4 |Digital Twin & Multi-Fidelity Simulation Study | Build a simplified digital twin of a vehicle and environment. Perform validation using both low-fidelity and high-fidelity simulation setups, comparing results and identifying discrepancies. |  * Understand role of digital twins in V&V \\  * Analyze trade-offs between simulation fidelity and scalability \\  * Quantify sim-to-real gaps and their implications |
-| 5 |Formal Methods for Safety Validation | Define safety requirements using a formal specification approach (e.g., temporal logic or rule-based constraints). Apply these to simulation traces and identify violations or edge cases. |  * Translate safety requirements into formal, testable properties \\  * Use formal methods for falsification and validation \\  * Understand limitations of simulation without formal rigor |

en/safeav/ctrl/testing.1774523759.txt.gz · Last modified: 2026/03/26 13:15 by airi