Advanced Optical Systems

HERMES Autonomous Positioning System

The Hermes sensor system provides real-time measurement of an aircraft's location relative to a beacon. The system components, going clockwise from the bottom left, are: a camera, a processor platform, an LED beacon, and an OLLI sensor.

Description
AOS has developed an autonomous load pick-up and delivery product called Hermes which uses an optical sensor to provide terminal guidance to an optical beacon. The Hermes system also supports autonomous helicopter landing on land or at sea. AOS has demonstrated Hermes on the Army Aeroflightdynamics Directorate's (AFDD) RMAX helicopter platform, Boeing's Unmanned Little Bird (ULB) helicopter, and Kaman's KMAX. The system is currently deployed to Afghanistan on the K-MAX as part of the Marine Corps Unmanned Cargo UAS (CUAS) Program.

Cargo Pick-up and Delivery
The Hermes auto load process is shown below. The Hermes sensor and processing electronics find and identify the load. Hermes provides precision navigational guidance to the aircraft and an automatic AOS hook connects to AOS ground equipment that is attached to a load. The aircraft flies to a waypoint and the Hermes sensor and processing electronics locate and identify an optical beacon. With the beacon in sight, Hermes directs the aircraft to its precise delivery destination.

 

The Hermes sensor and processing electronics find and identify the load. Hermes provides precision guidance to the aircraft and an automatic AOS hook connects to ground equipment that is attached to a load. The aircraft flies to a waypoint and Hermes locates and identifies an optical beacon. With the beacon in sight, Hermes directs the aircraft to precisely deliver the load. (PATENT PENDING)

Landing

The Hermes system is a real-time sensor system that measures the location of an LED beacon and its orientation. A camera and an optical communication sensor on the A/C take images of the beacon on the ship and provide those images to the sensor processing electronics, also on the A/C. Using those images, the processor computes the A/C's location relative to the beacon. It also computes the beacon's roll, pitch, and yaw. By placing the beacon on the ship deck, Hermes is thus able to compute the A/C position relative to the ship deck and the deck's motion and angle.

 

The Hermes system provides the front-end sensing required for any auto-landing or pilot cueing system. It calculates the state vector of the deck in a manner similar to the UAV Common Automatic Recovery System (UCARS), but does so with minimal hardware on the ship, hardware that is smaller than a briefcase.

Characteristic Value
Range 300m to 0.5m
Field of View 40° (OLLI); 46°x37° (camera)
Reporting Rate 30Hz
Deck Location Accuracy Better than 10cm at landing
Power Draw (A/C components) 22W avg, 32W peak
Input Voltage (A/C components) 18-32 VDC
Operating Temperature -32°C to +55°C (30 minutes at 71°C)
Cooling Requirements None; conducts heat to still air/baseplate
Environmental Qualifications To MIL-STD-810G
EMI/EMC Qualification To MIL-STD-461F

Hermes Product Price Sheet


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phone: +1 (256) 971-0036

 

 

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