Diren ABAT, mer BATMAZ, Team Leader Design Engineer Defence - - PowerPoint PPT Presentation

Diren ABAT, Team Leader Defence Systems Business Sector, ASELSAN Inc. Ömer BATMAZ, Design Engineer Defence Systems Business Sector, ASELSAN Inc.

Overview

UDT 2020, Rotterdam 1

ZarganaTM System by ASELSAN Outboard Launchers of ZarganaTM Estimation of Minimum Launching Speed Tests & Measurements Exit Speed Analysis Conclusion

ZarganaTM System by ASELSAN

UDT 2020, Rotterdam 2

• Host Platform Data Reception

and Processing

• Threat Data Reception and

Processing

• Sonar

Data Reception and Processing

• Data Processing
• Advise
• n

Tactical Evasive Maneuver

• Display and Warning
• Launcher Control

Outboard Launchers of ZarganaTM

UDT 2020, Rotterdam 3

• Instant reaction (< 5s)
• Separate launchers for port

and starboard

• Interface with decoys/jammers
• Automatic programming and

powering of decoys/jammers before deployment

• High redundancy
• Silent launch (No bubble /

gas release to environment)

Outboard Launchers of ZarganaTM (cont’d)

UDT 2020, Rotterdam 4

• Can be configured according to space on submarine

Launcher Unit (LU) Launching Module (LM)

Outboard Launchers of ZarganaTM (cont’d)

UDT 2020, Rotterdam 5

• Launching at all operation depths
• Gas generators are used inside
• Patented design, no gas and bubble release
• Decoys/jammers can be programmed just before launch

Estimation of Minimum Launching Speed

UDT 2020, Rotterdam 6

• Safe separation for an affective soft-kill defense
• Safe separation must be possible at,
• All submarine speeds
• All submarine maneuvers
• All operation depths
• Multiple numbers of 6DOF simulations are performed

Estimation of Minimum Launching Speed (cont’d)

UDT 2020, Rotterdam 7

• Simulation involves submarine maneuvers separately;
• Heading – Sterning pitch
• Roll
• Turning

Also combinations

Estimation of Minimum Launching Speed (cont’d)

UDT 2020, Rotterdam 8

• Different launching angles are considered, as well
• At horizontal plane
• At vertical plane

Estimation of Minimum Launching Speed (cont’d)

UDT 2020, Rotterdam 9

• Approximately the thousand of simulations were run
• Minimum exit speed was determined
• Detailed design was proceeded w.r.t. min. decoy exit speed

Tests & Measurements

UDT 2020, Rotterdam 10

• Launching Unit must be capable of providing min. exit speed to decoy
• Tests were performed because of
• To specify Launcher Unit geometry (Volume, nozzle profile, etc.)
• To determine power of gas generators

Tests & Measurements (cont’d)

UDT 2020, Rotterdam 11

• How can we measure the exit speed in water?
• Magnetic field can be used
• Well designed test equipment and prototypes were produced

Leakproof Magnetic Coil Electronic Box

Tests & Measurements (cont’d)

UDT 2020, Rotterdam 12

• Working principle of the test system base on,
• By means of two magnets on the test decoy
• Magnetic field of coil is distorted
• Time step between the two peaks is obtained

Tests & Measurements (cont’d)

UDT 2020, Rotterdam 13

• Many water tests were performed up to depth of ~200m
• Various gas generator types are tried
• Avg. exit speeds with each gas generator were recorded

Depth (m) Speed (m/s) Gas Generator Configurations 1 23 Configuration 1 50 23,5 Configuration 2 100 17.3 Configuration 3 150 29,2 Configuration 4 180 27 Configuration 5

Exit Speed Analysis

UDT 2020, Rotterdam 14

• We need exit speed analysis for more than ~200m depth
• Pressure characteristics of gas generators should be modeled
• Motion of the decoy during launching should be modeled
• Model should be corrected according to sea test results

Exit Speed Analysis (cont’d)

UDT 2020, Rotterdam 15

• A pressure cylinder with variable inner volume was designed
• All specified gas generators were tested at each volume
• Pressure vs. Time graphs are obtained
• Pressure at the demanded time and volume was put to analysis

Exit Speed Analysis (cont’d)

UDT 2020, Rotterdam 16

• Launching process of the decoy was modelled as 4 different phases

Phase-1: Gas generators are activated. The cap of LU is not opened. Phase-2: Cap is opened. Decoy is moving with ram plate and water inside the LU.

Exit Speed Analysis (cont’d)

UDT 2020, Rotterdam 17

• Launching process of the decoy was modelled as 4 different phases

Phase-3: Ram plate is stagnant. Decoy is leaving from ram plate. Water is filling remaining volume. Phase-4: Decoy is not inside the LU anymore. It gains its exit speed.

Conclusion

UDT 2020, Rotterdam 18

• For a successful countermeasure, safe separation of decoy must be assured
• Following steps are followed to define desired exit decoy speed
• All submarine maneuvers were examined with simulation
• Sea tests were performed and collected data up to limited depth
• Mathematical model was constituted and corrected according to sea tests