RUSTOM II is a Medium-Altitude Long-Endurance (MALE) Unmanned Aerial Vehicle (UAV) with an endurance of 24 hours and the ability to fly up to 25000 feet altitude.
It has multiple payload capabilities to support both daytime and nighttime operations.
The retractable landing gear system consists of dual redundant microcontrollers. The Landing Gear Controller (LGC) is required to execute and monitor the retraction, deployment, and brake sequence of the landing gear based on the command received from the Flight Control Computer (RFCC). The LGC is connected to the RFCC through the MIL1553B interface.
The RFCC acts as a bus controller (BC), and the LGC acts as a remote terminal (RT), with software-programmable RT addresses 22 (active) and 23 (standby).
However, provision is made to set the RT addresses through hardware.
LGC has dual redundant 32-bit microcontrollers in the main/hot standby configuration. When the main controller fails, the hot standby controller executes the operations.
The main controller and standby controller are interfaced via a cross-channel data link (CCDL) asynchronous RS422 interface.
LGC is connected to the RFCC via the 1553B bus for receiving commands, to the nose and main landing gears through analog input via ADC and duplex discrete I/O, and to the hydraulic motor pump via analog input and discrete output.
The LGC software performs the following functionalities:.
Perform modes of operation like retraction, deployment, brake, emergency deployment, and emergency brake based on the RFCC command.
Activate the landing gear subsystem assemblies like the hydraulic power pack, retraction, deployment, brake, bypass, and emergency valves.
Monitor the subsystem assembly, like wheel speed, weight on the wheel, hydraulic pressure, valve pressure, and actuator end-limit switches, and post the status to the RFCC.
Perform Power on Self Test (POST), Initiated Pre-flight Built-In Test (PBIT), and Continuous Built-In Test (CBIT) functionalities.
Output the parameters to telemetry.
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