Autonomous air ground surveillance unit
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Autonomous Air & Ground Surveillance Unit. Objectives, Preliminary Specifications, and Option Analysis . Design Objectives. Extend autonomous flight capabilities of a Rotomotion helicopter to include: The ability to determine landing zone suitability based on terrain Tracking of UGVs

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Autonomous Air & Ground Surveillance Unit

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Autonomous air ground surveillance unit

Autonomous Air & Ground Surveillance Unit

Objectives, Preliminary Specifications, and Option Analysis


Design objectives

Design Objectives

  • Extend autonomous flight capabilities of a Rotomotion helicopter to include:

    • The ability to determine landing zone suitability based on terrain

    • Tracking of UGVs

  • Develop UGV transport system:

    • Design landing gear with storage area for 3 UGVs

    • Develop capabilities necessary to securely load and unload UGVs autonomously

  • Develop UGVs and control system:

    • Design lightweight UGVs with GPS waypoint navigation and video uplink

    • Develop capability to safely drive into helicopter cargo bay


Final demo objective procedure

Final Demo Objective Procedure

Goal: All steps fully autonomous

  • UGVs load onto UAV

  • UAV takes off and fly to GPS waypoint

  • UAV determines safe landing zone and lands

  • UGVs unload

  • UGVs navigate to GPS waypoints and provide video surveillance

  • UAV takes off and provides further surveillance in the air

  • UGVs return to landing zone

  • UAV locates UGVs and lands near them

  • UGVs load onto UAV

  • UAV take offs and flys back to initial launch zone

  • UAV determines safe landing zone and lands

  • UGVs unload


Ugv specifications

UGV Specifications

  • Low enough weight to fit 3 on the SR-20 (max payload 10 lb)

  • Capable of GPS waypoint navigation with no external control

  • Onboard wireless camera for surveillance and visual servoing into helicopter cargo bay

  • Capable of drive-by-wire by autonomous remote unit based on video feed (for visual servoing during loading and unloading)


Ugv cargo bay specifications

UGV Cargo Bay Specifications

  • Bays for 3 UGVs

  • Actuated wheel blocks for security during flight

  • LED targets to guide UGVs into their bays


Cable suspended payload vs integrated into landing gear

Cable Suspended Payload vs Integrated Into Landing Gear


Sr 20 vs sr 100

SR-20 vs SR-100


Conclusions

Conclusions

Payload Mechanism:

  • If simplicity is the primary concern, a landing gear integrated bay is the desired mechanism

  • Cable suspended payload provides more flexibility at the cost of weight and complexity, if the weight of the cable suspension mechanism can be tolerated, and oscillations during use minimized, suspended payload is the desired mechanism

    Vehicle:

  • SR-20 is the desired platform if weight can be sufficiently minimized

  • If high payload capacity is required, SR-100 is the desired platform, but it requires more significant modifications and monetary risk


Path forward

Path Forward

  • Test SR-20 payload capacity

  • Design and build prototype UGV and controller

  • Based on UGV characteristics, design and build UAV cargo bay

  • Extend UAV and UGV capabilities

  • Integrate UAV and UGV systems


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