Volume/Mass-Constrained Autonomous Underwater Vehicle Platform
Advanced mini-UUV demonstrator with modular payload bay, simulated effects integration, and multi-sensor fusion navigation achieving 1.2%/hr positional drift
The Mini-UUV Systems Demo represents a comprehensive autonomous underwater vehicle platform designed for constrained operational environments. The system integrates advanced navigation, modular payload architecture, and simulated environmental effects to demonstrate real-world UUV capabilities at reduced scale.
Multi-sensor fusion combining IMU data with doppler velocity surrogates and acoustic beacon positioning to achieve sub-2% navigation drift over extended missions, enabling precise autonomous operations in GPS-denied underwater environments.
Simulate UUV navigation performance under different mission parameters and environmental conditions.
| Parameter | Value | Notes |
|---|---|---|
| Payload Bay Volume | ≤ 0.8 L | Hot-swappable modular design |
| Payload Mass Capacity | ≤ 700 g | Maintains neutral buoyancy |
| Navigation Accuracy | 1.2% drift per hour | Multi-sensor fusion (IMU + Doppler + Acoustic) |
| Mission Endurance | 75-110 minutes | Dependent on payload and speed profile |
| Power Consumption | 50-80 W | Propulsion + Sensors + Computing |
| Maximum Depth | 100 m | Pressure-rated hull design |
| Operating Speed | 0.5-2.0 m/s | Variable based on mission requirements |
| Communication | Acoustic modem | Low-bandwidth command & telemetry |
Detailed power consumption breakdown across subsystems and mission profiles.
The hot-swappable payload bay supports rapid mission reconfiguration with standardized mechanical and electrical interfaces.
| Payload Type | Mass | Volume | Power | Use Case |
|---|---|---|---|---|
| Optical Camera | 350 g | 0.4 L | 8 W | Visual inspection, mapping |
| Side-Scan Sonar | 650 g | 0.7 L | 15 W | Seafloor mapping, object detection |
| Water Sampling | 500 g | 0.6 L | 5 W | Environmental monitoring |
| Acoustic Relay | 400 g | 0.5 L | 12 W | Communication extension |
| Sensor Package | 300 g | 0.3 L | 6 W | CTD, turbidity, fluorometry |
Mechanical: Quick-release latching mechanism with O-ring seal
Electrical: 12-pin connector (Power, Data, Ground)
Data: RS-485 serial bus + Ethernet option
Swap Time: < 3 minutes field replacement
Comprehensive FMEA covering critical subsystems and failure scenarios.
| Subsystem | Failure Mode | Effect | Severity | Mitigation |
|---|---|---|---|---|
| Propulsion | Thruster failure | Loss of maneuverability | High | Emergency surface, redundant thrusters |
| Navigation | IMU drift exceeds threshold | Position uncertainty increases | Medium | Acoustic beacon updates, surface GPS fix |
| Power | Battery depletion | System shutdown | High | Low-power warning, auto-abort mission |
| Communication | Acoustic link loss | Cannot receive commands | Medium | Autonomous mission completion, timeout abort |
| Hull Integrity | Water ingress | Electronics damage, loss of buoyancy | Critical | Leak detection sensors, watertight compartments |
| Depth Control | Buoyancy control failure | Uncontrolled ascent/descent | High | Drop weight mechanism, pressure relief |
The mini-UUV architecture integrates multiple subsystems through a ROS2-based middleware.
| Layer | Components | Description |
|---|---|---|
| Mission Planning | Path Planner, Behavior Trees | High-level mission execution and waypoint generation |
| Navigation | EKF, Sensor Fusion | Multi-sensor integration for position estimation |
| Control | PID Controllers, Dynamic Positioning | Low-level thruster control and station-keeping |
| Perception | Sonar Processing, Obstacle Detection | Environmental awareness and collision avoidance |
| Communication | Acoustic Modem Driver, Telemetry | Command reception and status reporting |
The system leverages ROS2's real-time capabilities with custom nodes for:
Extensive testing in Gazebo and Unity environments validates system performance.