Extended Range Guided Munition (ERGM) Safe & Arm Device and Height-of-Burst Sensor

Transcription

1 Extended Range Guided Munition (ERGM) Safe & Arm Device and Height-of-Burst Sensor Robert Hertlein L3 Communications KDI Precision Products Cincinnati, OH Mark Miner Raytheon Missile Systems Tucson, AZ NDIA Fuze Conference April 9, 2003 New Orleans, LA The effort described herein was sponsored by the U. S. Navy under contract N C

2 ERGM Background Designated the EX171, ERGM is being developed for the US Navy (NSWC/WD) by Raytheon GPS-Guided Projectile Long range (15-50 nautical miles) Highly accurate independent of range Extremely effective against a variety of targets Designed for use on 5 naval gun systems Provides effective fire support for operations ashore 2

3 ERGM CONOPS GPS Acquisition Window Unitary Warhead With Height of Burst Sensor Motor Burn Canards Deploy Data Load Gun Launch Fins Deploy Battery On Establish Glide Slope for Maximum Range If GPS Jammed, Inertial Guidance to Target Body Angle Control for Added Lethality Target 3

4 ERGM Background (continued) Formerly DPICM -- Converted to Unitary Warhead Near vertical approach angle Maximum lethality achieved with well-controlled burst height Requires accurate, reliable HOB sensor KDI designed S&A for DPICM round Selected by Raytheon to design HOB Sensor and S&A 4

5 Overview Flight Battery Rocket Motor Height Of Burst (HOB) Sensor Unitary Payload Safe and Arm Device 5

6 HOB Sensor Design Requirements Very Tight HOB Tolerance (10 ± 2 ft) Approach angle vertical ± 10 Packaging Volume HOB sensor limited to two pockets in existing casting Signal processing module Antenna Must Survive all ERGM Environments Setback acceleration 10,100 g (nominal) Balloting 2,500 g -40 F F storage +15 F F operating 6

7 HOB ANTENNA HOB Sensor Packaging CLEARANCE FOR COAX CONNECTOR FLIGHT UP FWD HOB ELECTRONICS GPS ANTENNA 7

8 HOB Sensor Electronics Directional Doppler Radar (DDR) Proximity Sensor Based on RF Transceiver MMIC and Signal Processor ASIC Developed for Multi-option Fuze for Artillery (MOFA) Performance well characterized ECM resistant Low risk Packaged to fit within available volume 8

9 HOB Functional Block Diagram Electronics Module Battery + Enable PCU Ground Optocoupler Enable Voltage Regulator Battery Ground +5VDC Fire Return System Clock Antenna Modulation Fire Command Signal Processor I.F. Transceiver Coaxial Cable 9

10 HOB Sensor Electronics Module 10

11 HOB Antenna Electrical Design Requirements Forward looking pattern with side-mounted antenna Wide bandwidth Gun rugged 11

12 HOB Antenna Projectile axis Raytheon design Meets requirements with margin 12

13 HOB Antenna Radiation Pattern Nose Forward 13

14 Safe & Arm Device Electromechanical Command-to-Arm Setback is First Environment 3 G-Leaf Setback Sensor Second Environment spin switch FPGA-Based Logic Serial Communication with Mission Computer 14

15 S&A Key Performance Requirements Topic Value Setback (proof) 12,000 g Setforward 2,500 g Ballotting 2,500 g Power Supplied V Weight Elec. Assy. (Total 1 Lb. ) Weight Mech. Assy. (Total 1 Lb.) 15

16 S&A Internal Arrangement - Mechanical Details Setback Mechanism Detent Piston Actuator Rotor Lock Shaft Rotor Setback load supporting shelf Second lock due to interference between the rotor lock spring and rotor First lock due to interference between the rotor lock shaft and rotor 16

17 S&A External Interface Illustration Mechanical Assembly Connector to Electrical S&A Alignment Pin Fastener Holes Explosive Output (aft face) 17

18 S&A Integration ALIGNMENT RING BULLSEYE CONNECTOR FLIGHT BATTERY UPPER ELECTRONICS SUPPORT LOWER ELECTRONICS SUPPORT S&A ELECTRONICS FUZE CUP ASSEMBLY 18

19 S&A/HOB Functional Block Diagram Power Battery Enable HOB Sensor Power Conditioning Unit Pre-Launch Mission Data Mission Computer GEU Serial Data S&A Interface Electronics S&A Mechanism/ Explosive Train 19

20 Design Status HOB Sensor Lab testing shows excellent performance Tight HOB over expected target variations Significant sensitivity margin Gun-hardness proven in Canister Test Safe & Arm Device Successfully passed HAST Mechanism qualified on DPICM round Gun-hardness proven in Canister Test 20

21 Summary Mature System Concept HOB sensor and S&A based on qualified designs Low Risk Maximum Reliability Rapid Development Meets all System Requirements Team work essential part of success Successful ERGM Guided Flight Test 4m accuracy EX171 Meets or Exceeds User Needs! 21