Naval Systems

Sigma’s naval systems operate in the most unforgiving environments on earth. Every system is engineered for the demands of modern naval operations where failure is not an option.

Forged for the deep

Electrical Actuation Control System – Heavy-Weight Torpedo

  • Digital controller and intelligent power drive
  • Four (4) permanent magnet synchronous (PMS) motors
  • Deflects control surfaces (elevators and rudders) of the torpedo based on input command from On Board Processor (OBP)
  • EMI/EMC compliant
  • Electrical actuation system
  • Digital controller based on TMS320F2808 DSP
  • Intelligent power drives communicating on CANbus
  • Command from On Board Processor (OBP) on MIL-STD-1553
  • Complete integrated system

Forged for the deep

Megh-Suchak (MS-10) Cloud LiDAR

  • Detects and measures cloud height up to 10 km with 5-metre resolution
  • Fixed, Circular, Vertical and Conical scans
  • Transmits 1064 nm laser
  • Receives reflected signal from cloud through a Cassegrain telescope and beam concentrator, focussing on an Avalanche Photo Diode
  • Data acquisition at 40 MSPS using high-speed UltraScale FPGA
  • Height resolution of 5 metres
  • Motorised gimbal to point the system in Azimuth (0–360°) and Elevation (−20° to +90°)
  • IP66 enclosure (rain and dust resistant)
  • Temperature-controlled enclosure
  • Ethernet and Wi-Fi connectivity with LabVIEW based host GUI

Forged for the deep

MPIDS – Mains Power Interface and Distribution System

  • Deployed on High Endurance Autonomous Underwater Vehicle (HEAUV)
  • Intelligent and controlled power distribution to different on-board subsystems
  • Accepts 150V DC battery input channel (14 kW)
  • Provides multiple output channels:

    1. 28V DC (32 nos.) – 1.5 kW
    2. 48V DC (24 nos.) – 1.5 kW
  • OBC interface on MIL-STD-1553
  • Dual-redundant system controller
  • Multiple intelligent and independent power modules
  • Inter-module communication on CAN bus
  • Time sequencer for recovery
  • Round-shell connectors

Forged for the deep

Antenna Control Unit

  • Ground-based tracking unit for UAV
  • Conduction-cooled PowerPC based single board computer with customised VME64 backplane and interface board
  • Receives and transmits data over Ethernet link with different subsystems
  • Digital inputs (16) and digital outputs (16)
  • Analog inputs (8) and analog outputs (4)
  • Ethernet ports (3), serial ports (3), CAN Bus, SSI interfaces (4)
  • Interface with incremental and absolute encoders
  • Embedded software with VxWorks RTOS, validated to DO-178B Level C

Forged for the deep

Auxiliary Display Unit

  • Receiver operator interface
  • Receives track information from a SuperHet receiver and displays in spectrum mode
  • Acts as operator interface to the receiver
  • Supports setting up for SCAN and STEP strategies
  • Supports display for signal in time domain
  • Displays radar signals — PRF and PW