Company this week announced successful integration tests of its Sigma 40 shipborne navigation system.
PARIS, Oct. 21 (UPI) — Safran Electronics and Defense has successfully carried out integration tests of its Sigma 40 ship navigation system with the alignment system of the AGM-84 Harpoon anti-missile system.
The test was carried out within the scope of a contract signed with Korean naval shipyard DSME, Safran said in a statement.
The company also worked with Harpoon manufacturer Boeing on the tests.
The systems are intended for Krabi corvettes and KDX-class frigates deployed by the Royal Thai Navy.
After the successful tests, Safran’s inertial navigation systems can now be used in all of Thailand’s warships.
The Sigma 40 system is also used for conventional navigation and stabilization functions on ship sensors and weapons.
Sigma 40 navigation systems are built around a ring laser gyro inertial core, offering sustained precision and a high degree of operational flexibility.
Sigma inertial navigation systems are now fitted to combat systems on more than 500 warships, including the latest front-line ships such as the Charles-de-Gaulle aircraft carrier, Europe’s Freem and Horizon frigates and helicopter carriers.
Original post @upi.com
Sigma 40: laser gyro technology inertial navigation system
The Sigma 40 inertial navigation system is making use on laser gyro technology. An advanced system designed by Sagem for maritime applications, the Sigma 40 meets the most demanding navigation and weapon system stabilization requirements.
Both an inertial attitude and heading reference system, the Sigma 40 offers high performance and precision for all sizes of surface vessels. Both compact and robust, the Sigma 40 delivers all data needed for navigation: heading, roll and pitch, angular velocity, position and heave, vertical/horizontal speed and acceleration.
The Sigma 40 is suited to all types of platforms, including fast patrol boats, mine-hunters, corvettes, frigates, aircraft carriers, etc. It comprises an inertial navigation unit (INU), control and display unit (CDU) and an installation bracket, for fast removal and reassembly without recalibration. Both innovative and scalable, the Sigma 40 is easy to install, maintain and operate. Source @safran-electronics-defense.com
The main features of RLG Sigma 40 are :
- It has got high-level performance
- It has very simple installation requirements
- It has very convenient operation procedure.
- It does not requires any preventive maintenance.
- It consists both Synchro and digital interfaces. There is no need to provide any extra hardware interface.
- It is IMO approved and military standards certified.
- It is very reliable and rugged.
The core aim of RLG sigma 40 is :
- To provide the target navigational data like heading, roll, itch etc in real time.
- To regularly update the target navigational data like speed and velocity.
- Interfacing of other navigational inputs from/to other Navigational equipments like EM Log, GPS, DGPS, Radar, Anemometer etc.
Sub-Units of RLG Sigma 40:
The RLG Sigma 40 system contains four basic sub-units. They are as follows:
Components of Ring Laser Gyro Sigma 40 – Image @electricalfundablog.com
Here, INU stands for Inertial Navigation Unit
CDU stands for Control and Display Unit
DDU stands for Data distribution unit, and
UPS stands for Uninterrupted Power Supply
The Inertial Navigation Unit of basic RLG Sigma 40 unit consists of the following sub-units:
- Inertial Sensor Block (referred as BSI)
- Basic Synchro Module
- EB Module
- UTR-SP Module
- Interface module (or RS 422 Module)
- Power Supply Unit
- HT/ THT Module
Composition of Inertial Navigation Unit – Image @electricalfundablog.com
The Inertial Sensor Block (BSI) consists of the various sensors. They are :
- Laser Gyros (Model GL S32) 03 in numbers : It senses Angle of Rotation and Speed of Rotation.
- Accelerometers (Model A-600) : It senses the acceleration.
- EACC : It consists the circuitry for controlling the Pendulum of Accelerometer using servo elements. In addition to that, It also contains the EEPROMs which stores the sensor’s calibration data.
** EEPROM stands for Electrically Erasable Programmable Read Only Memory.
Krabi Class OPV: Here