MBT Arjun Gunnery Training Simulator

Combat Vehicles Research & Development Establishment (CVRDE), Avadi, has initiated the development of simulators for MBT Arjun gunners under the project Gunnery Arjun Part Task Training Simulator (GAPTTS). Mass production of MBT Arjun is in progress and the users need training to use this state-of-the-art battle tank effectively and efficiently. The simulators will impart cost-effective, exhaustive and extensive training.
 
In this novel training methodology, training will be in steps of increasing content and complexity instead of having a single simulator which traditionally many other leading tanks in the world have. It will provide training in three stages:
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Classroom Gunnery Training Simulator
(CGTS-Agastya)-A software-based version with soft panels for gunnery controls is aimed at teaching the functionalities of the various controls and switches present in the gunner station to a group of gunners in a classroom. It also includes bilingual (Hindi/English) online help for the gunners to independently learn the tank gunnery operations with the help of a simple mouse click.

Desktop Gunnery Training Simulator (DGTS-Agastya)- This aims at imparting hands-on experience to the gunners with replicated gunner station hardware. The procedural operation on the Integrated Fire Control System (IFCS) is taught. CVRDE in association with CASSA, Bangalore, has developed these two versions of training simulators.

Desktop Gunnery Training Simulator

 

 

    
                             

Desktop Gunnery Training Simulator 

GTS Gunner Station

Gunnery Training Simulator (GTS)- A full-fledged high fidelity simulator provides with advanced procedural, laying, tracking and firing skills to the gunner. This containerised, air-conditioned simulator systems has separate compartments for the instructor and gunner. The gunner has all the vital gunners' equipment positioned in the exact place as in the tank. This simulator has gunner seat vibration unit to simulate the realistic disturbances felt by the gunner during the operation. Specially developed piping optics integrated with gunner's day and thermal eyepieces provides the same field of view of the battlefield environment as in the actual tank. The instructor with his dedicated console can plan, conduct, monitor the exercises and evaluate the trainees based on their performance.

Gunnery Training Simulator

Gunnery Training Simulator


 

The GTS has been developed in a record period of 15 months in association with M/s Macmet India Ltd., Bangalore and two such systems are commissioned at CVRDE. Lt Gen Tej Paul, the then CC R&D (R), inaugurated the GTS unit at CVRDE. The user training on these simulators was carried out for the batch of gunners from 43 AR. Their feedbacks were received and incorporated in the simulator.

GTS Instructor Station
GTS Instructor Station

 Indigenous Development of  Nd : YAG Laser Material

Solid State Lasers are widely used for military applications, especially in Range Finders and Target Designators. The heart of such systems is a laser host crystal or a glass doped with active ion and Nd: Y AG is the most widely used Laser Crystals.
 

Nd : YAG Laser Material
Nd : YAG Laser Material

Laser Science & Technology Centre (LASTEC), Delhi, has attained the capability of crystal growth, laser rods fabrication and its use as laser devices. The feed material for the growth of Nd:YAG crystal was synthesised from high purity chemical of Nd2O3, Y203 and Al203 in stoichiometric composition. Growth was carried out in Iridium crucible (f= 50 mm and L = 50 mm) in inert (Argon) atmosphere. The thermal set-up for the experiment consisted of a quartz tube with Alumina fiber lining and Zirconia grains inside. A single crystal of Nd: YAG (with 1 percent Nd doping) was grown in continuous growth run of 10 days with pull rate of 0.5 mm/h. The grown crystal has total length of 86 mm including seed, shoulder, cylinder and tail of 3 mm, 10 mm, 70 mm and 3 mm, respectively and cylinder dia of 20 mm. Both ends of the grown crystal were cut and polished to identify the core region which is normally found in Nd:YAG.

The homogeneous portions of the crystal were cut into rectangular/triangular pieces with the help of diamond wire and disc saw machine. These pieces were then made cylindrical by machining them using diamond tool and laser rods of dimensions f=5 mm, L=50 mm were obtained. The faces were then lapped and polished.

The laser rod was tested for lasing under flash lamp pumping in a plano-concave resonator with highly reflecting mirror of ROC=1 m and output mirror reflectivity was optimised. Threshold energy was found to be 1.5J @ 70 percent R and maximum output energy was 216 mJ @ 25J input with 60 percent R output mirror. The performance of indigenous rod was found to be equally good as that of an imported rod of the same size. This is an important step towards attaining total indigenous capability in the area of Solid State Laser
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