Agency for Defense Development. RRDF Design

Transcription

1 Name : Hae Suk Lee Country : South Korea Phone number : ( ) Company : ADD(Agency for Defense Development) lee@hanmail.net 1

2 A study on design of range reduction dummy fuze(rrdf)for the efficiency of acceptance test

3 Contents Background and Purpose A task for design of RRDF A stage for development A verification for trajectory Results 3

4 Background and Purpose Fishing Boat A difficult for K9 assembly for acceptance test Sea Control Civil Appeal Manpower and Equipment Test Schedule Production Plan 4

5 Background and Purpose K9 Self-propelled howitzer K9 Assembly 5

6 Background and Purpose A content for K9 Acceptance test Order Elevation(mil s) Ammunition Range for Safety 1 26 KM107/KM73A1/K677(U2) 1~6km 2 26 K309(BB ON)/K519/K678 3~17km K309(BB ON)/K519/K678 32~35km K309 projectile with RRDF 6

7 Background and Purpose A range for K9 safety range Elevation(km) 25km 13km 6k 17km 0 m Firing Site 1st(26mils) 2nd(26mils) 3rd(1208mils) 34km Range(km) 7

8 Background and Purpose Firing Direction Seosan Shinjin-do Anmyon-do Daecheon Kunsan Anma-do Daeheosa-do 8

9 A Technology for drag force increasing 9

10 Drag force coefficient * Reference : Jae Hun Jung, A Study for Drag force decreasing, Korea Military Academy, 2001(2~3page) 10

11 A drag force coefficient by warhead shape * Refence : Guided Weapons(Brassey s Defense Publishers, 66page) 11

12 Trajectory Estimate Safety at ultra-pressure Firing Test (Verification) Simulation Trajectory test (40mm projectile) Recoil&C Recoil Characteristics 12

13 A safety for Ultra pressure(static test) Load Punch(SM45C) Shear section RRDF (AL2024-T4) 13

14 Trajectory estimate(prodas V3) 14

15 Drag Coefficient estimate(prodas V3) 15

16 Gyro Stability estimate(prodas V3) 16

17 Gyro Stability and Dynamic Stability(Prodas V3) Prodas V3 이용 (Gyro Stability & Dynamic Stability) 17

18 Gyroscopic Stability & Dynamic Stability * Reference : Kim jin suk A study of aerodynamics characteristics of rotating projectiles, ADD, 1990(20~22pages) 18

19 Trajectory Simulation(Point Trajectory Program) A Range Estimate with point trajectory program 19

20 Trajectory Test(Downsized projectiles : 40mm) 20

21 Trajectory Test(Downsized projectiles : 40mm) A measurement for Physical Properties 21

22 Trajectory Test(Downsized projectiles : 40mm) A muzzle velocity order model Reduced RRDF(m/s) Reduced K519 fuze(m/s) Reduces RRDF Downsized K519 fuze Physical Properties Properties model Reduced RRDF Reduced K519 fuze Weight(g) Axial MOI(g-cm) Transverse MOI(g-cm) CG from Nose(mm)

23 Trajectory Test(Downsized projectiles : 40mm) Aerodynamic and Sg (6-DOF Single Fit Analysis) 23

24 CX0 SG Agency for Defense Development Trajectory Test(Downsized projectiles : 40mm) 0.30 High Drag Projectile K310 Projectile 2.20 High Drag Projectile K310 Projectile Mach No g Mach No. Drag Coefficient, CXO Comparison Gyroscopic Stability Factor, SG Comparison 24

25 155mm K9 Recoil & C Recoil characteristics (Recoil Length, 1Cycle time, C Recoil velocity, Internal pressure) LVDT(Installation) LVDT : Linear variable Differential transformer Elevation(1208 mil) LVDT Sensor Signal Conditioner A/D Converter Data/Report 25

26 (Comparison) Section RRDF K519 Dummy Plate Fuze Figure Weight 715±15g 715±15g 975g ±25g Materi al AL A2024T4- T4 (KS-D-6763) AL A2024T4-T4 (KS-D-6763) SCM30 (KS-D-3752) Length 125mm 167mm 60mm 26

27 RRDF K519 Dummy fuze (A center of weight) 27

28 RRDF K519 Dummy fuze (A inertia moment) 28

29 (Recoil Length, 1Cycle time, C Recoil velocity, Internal pressure) Recoil Length 29

30 (Recoil Length, 1Cycle time, C Recoil velocity, Internal pressure) 30

31 A stage for development 31

32 Firing Range(km) Agency for Defense Development A stage for development Test data polynomial Regression Y= A + B1*X +B2*X^2 A = B1 = B2 = R-Square = Cordinated Fuze size(mm) RRDF dia.(mm) Range Estimate(km)

33 A verification for trajectory Moving Route(RRDF & K519 dummy fuze) 33

34 A verification for trajectory(range) Range(RRDF & K519 dummy fuze) 34

35 A verification for trajectory A distribution of range 35

36 A verification for trajectory Drag force Coefficient measurement(doppler Rader : ED 6500) 36

37 Results We were able to study a RRDF which could reduce the range from 32km to 16km as 50% This will enhance the test efficiency and a oil fee which is used for safety ship also will be reduced At the elevation of 1208mils for K9 self propelled howitzer, A internal pressure, Recoil Length and recoil & Counter recoil were satisfied with the defense specification We simulated trajectory, preliminary range, trajectory stability and Drag coefficient with PRODAS We also tested RRDF with downsized projectiles and also studied projectile with full model By designed RRDF, Recoil & Counter Recoil characteristics, Muzzle velocity, Internal max pressures were proved an identity K519 fuze adapted to 155mm K309(BB ON)projectile 37

38 Thanks for you 38