PERSPECTIVE ON TORPEDOES - ficci.inficci.in/events/22716/ISP/Abraham-Varughese -NSTL.pdf · 2...
Transcript of PERSPECTIVE ON TORPEDOES - ficci.inficci.in/events/22716/ISP/Abraham-Varughese -NSTL.pdf · 2...
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Contents
Torpedoes –Wish list
Performance improvements – Implications
Hydro dynamics, Propulsion and Homing
Development Process
Indigenous efforts and way ahead
UW
SYSTEMS
R & D
HOMING
INSTRUMENTATION MODELING &
SIMULATION
EMBEDDED
SYSTEMS
CONTROL
MECHANICAL
SYSTEMS
MOTOR
TRANSDUCERS
TORPEDO SYSTEMS DEVELOPMENT
BATTERIES
SOFTWARE
GYROS & INS
SIGNAL
PROOCESSING
WARHEADWIRE GUIDANCE
SENSORS
THERMAL
PROPULSIONTRACKING
ALGORITHMS
WEAPON DELIVERY
STEALTH
HYDRO DYNAMICS
5/4/20164
Torpedoes –Wish list
• Maximise Range ( Thermal Prop; CCTS)
• Depth Operation : 800 m + (New Materials)
• Maximise speed without compromising homing
• Maximising homing range with ACCM
• Homing capability for littoral waters
• Torpedo stealth (IMP, Hydrodynamic profile)
• Wire guidance ( Long Range fibre optic communications)
• Improved Sonars
• Insensitive , light weight & more lethal warhead.
• Super cavitating u/w missiles
• Torpedo integration with network centric ASW
• Use of COTS & Open architecture
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PERFORMANCE IMPROVEMENT - IMPLICATIONS
INCREASE IN
HOMING RANGE
CALLS FOR
TRANSDUCERREDESIGN
ISOLATORSIMPROVEMENT
REDESIGN ORCHANGE OFPROPULSOR
CHANGE INOPERATIONALFREQUENCIES
EFFECTIVEELECTRONICSAND SIGNALPROCESSING
REDESIGN OFHYDRODYNAMIC
PROFILE
TRANSMISSION POWER
LOW SELF NOISE
6
1531
100
250
0
50
100
150
200
250
300
18 23 34 46 50
TORPEDO SPEED IN KTS
PR
OP
UL
SIO
N P
OW
ER
IN
K
W
Torpedo Propulsion Battery
Determines the Following Torpedo Parameters
• Torpedo Speed
• Torpedo Range
• Torpedo Endurance
As the Biggest Sub-system of the Torpedo by virtue of its Weight
and Dimensions ,determines the Torpedo Weight and Length
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Thrust areas
Drag reduction techniques to be employed
Increased Propeller efficiency
Profile compliant motors
Weight reduction of the battery
Shells : weight reduction
Reduction of self noise
Incorporation of multi resonant sensors
Light weight secondary battery technologies
5/4/20168
High endurance
High Starting Torque
Direct Switching from battery
Higher Power to Weight Ratio
High Efficiency
Quick acceleration
Incremental Speed Change
Low Radiated Noise
Options
Single shaft
Contra rotating
BLDC
Propulsion Motor : Requirements
5/4/20169
Mode of operation
Active
Passive
Mixed
Detection based on digital signal
processing techniques
ACCM features
Conformal Array with Wider look
angle
High Source level
Online selection of PRI & PW
Homing System – Current Technologies
Search for target
Detection of target
Echo validation
ACCM
Generate target
parameters
5/4/201610
Homing System - Options
Conformal array
Advantages
Look angle is more
Disadvantages
Ranges are lesser than Planar
array
Reverberation problem due
to more vertical beam width
Planar array
Look Angle is less ( < 100
deg horizontally)
Grating lobes in extreme
beams
To avoid grating lobes,
frequency is to be changed
from center beam to extreme
beam which demands higher
bandwidth of sensors
• Frequency of operation—space
availability
• Area of coverage – Array design
• Signal design – Long range
detection,ACCM
• Source level --- Acq. Range,
Cavitation limit
• Active mode detection
• Passive mode detection
• Post detection schemes
• Adaptive threshold - CFAR
algorithms
5/4/201611
Challenges in Homing system design
Reduction of self noise
Detection of target in presence of high reverberation levels
Intelligent data processing to take online decision for better
acquisition of target/ discrimination of target echo against
decoys
High probability of detection in an intense ACM environment
Long range detection and classification of quiet, anechoic
target submarine transiting at slow speeds.
Multiple signals for optimal detection of target in
Deep/Shallow waters and in the presence of decoys
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Fiber Optic Communication System
Development of Fiber Optic System
Bend insensitive fibers
Polymer based jacketing
Winding technique
Packaging of the spool
Over claim by
R&D Agency
Confidence of
User on Production
TrialsAvailability
of slots
No. of Trials
Production
issues
T O T
Design
Changes
Change of
Contractors
Test
Facilities
Time delays - Solutions
R & D Projects for Technology
Development
Dedicated Test Ranges
More Simulation based trials
Appreciation of product /
technology by user
Concurrent Engineering
association of PA during R & D
Pre-processing of Production
order by User
Training
TOT
Team
reviews
LAB
PA
QA
INDUSTRY
Process
SheetsDRAWINGS
ATP’SMQAP’S
TORPEDO- CONCURRENT ENGINEERING
5/4/201615
Light weight torpedoes
Torpedo Advanced Light ( TAL) Air and ship launched
Completed all user trials satisfactorily
Inducted to Indian Navy