43rd Gun & Missile Conference Presented by: Mr. Perry Salyers April 21 – 24, 2008 2 OUTLINE • ERGM System Overview • ERGM System Operation • M982 System Overview • M982 System Operation • System Target & Excalibur Characteristics • M982 Fuzing System • S&A Technical Requirements • MIL-STD-1316D Compliance – Excalibur FSA Time Line – Excalibur FSA Logic Design • Fuze Safe & Arm Description • S&A Mechanical Design • S&A Electrical Design • Electrical Module • S&A Integration • S&A Explosive Outputs • HOB Sensor Description • FS&A Description • Program Test Results / Milestones • ESAD Development Status 3 EX171 ERGM Tactical System Tail Fin Assembly Ram Brake Ramming Sheath Pressure Balanced Rocket Motor High L/D Stable Airframe Mid-body Obturator High Explosive Payload Safe and Arm Device Telemetry Canards Inertial Measuring Unit GPS Receiver Flight Battery Control Actuation System (CAS) Data Hold Power Source Height-Of-Burst (HOB) Fuze Digital Communications Interface (DCI) Anti-Jam Electronics Guidance Electronics Unit (GEU) 4 EX171 ERGM OPERATIONAL CONCEPT Artillery Missile Batteries Bunkers Troops LAVs Air Defense Conventional Projectiles ERGM Projectiles Helo Landing Zone Nautical Miles Conventional 0 1 0 2 0 4 0 6 0 3 0 5 0 Extended Range Guided Munition Beach Head Landing Zone 5 Excalibur (M982) System Overview Characteristics/Description: ● Warhead: Unitary ● Accuracy: 10m CEP objective ● Range: 40Km objective ● Targets : Personnel, light materiel, structures ● Fuze modes: PD, PD delay, Prox ● Environments: ● 15.5 KG set back ● Early fielding ~12KG ● 50+ KG penetration ● 155MM Extended Range guided projectile ● Fin Stabilized Glide Air Frame ● Inductive Set with Enhanced Setter ● Inertial Navigation System (INS) Guidance ● All Weather, Day and Night ● Compatible with JLW155 & FCS Digitized ● 155mm Platforms ● One Meter Length / 106 lb 6 Excalibur Unitary Concept of Operations • Gun Target Location • Trajectory Information • Crypto Keys • Precise Time • Fuze Setting • Power • r t ti • rj tr Ifr ti • r t • r i i • z tti • r Mission Planning i i l i • Precision Delivery Regardless of Range • Limits Collateral Damage • Decreases Volume of Fire Per Engagement • Enhances Soldier Survivability • r ii li r rl f • i it lltrl • r l f ir r t • lir ri ilit Guidance Acquisition and Track Latitude / Longitude / Altitude Structure Top Attack (Detonation after Penetration) Fragmenting Warhead Deploy Canards prior to Apogee (Ballistic prior to Apogee) System Initializatio n Height of Burst Sensor Fragmenting Warhead or Top Attack Penetrating Warhead depending on the target Targeting r ti Impact Near Vertical for Max Lethality 7 Excalibur Characteristics Unitary Targets Infantry Platoon Excalibur: 3 rounds M549: 25 rounds M107: 43 rounds Radar Excalibur: 1 round M549: 10 rounds M107: 11 rounds Command Post Excalibur: 6 rounds M549: 54 rounds M107: 78 rounds Structures Excalibur: 3 rounds M549: 147 rounds M107: 110 rounds Excalibur at any range M549 at 20Km M107 at 15Km •~10m CEP •Same lethality as an 155 mm HE System used in a complex target environment! 8 Excalibur Fuzing System (FS&A w/HOB) 9 FS&A REQUIREMENTS • Projectile Application – All Arm - 1,700 G’s – No Arm - 300 G’s • Spin • Interface With GN&C • MIL-STD-1316D Compliant ERGM and Excalibur Mechanical S&A 10 Excalibur FSA /Flight Timeline Safe Separation Timer 3 SEC <1.0 Sec 9. Detonate 8. Arm Command To FSA 3. Arm Power Available Canards Deployed 4. “Measure Spin” Cmd to FSA 2. Initialize FSA T1 = 11 Sec 6. Pass Det Mode to FSA T1 7. Power Up HOB (Optional) Electronics Battery Powerup Projectile Flight (Unarmed) Projectile Flight (Armed) Total flight time 55 to ~260 seconds 5. Valid 2nd Arming Environment FSA Measures Despin Profile 11 2ND Arming Environment Timeline 11 sec, nom Gun Fired T=0 RATE >7 Hz PROJECTILE ROLL RATE VALID 2ND ARMING ENVIR SAFE SEP TIME ENABLE MEASURE SPIN MESSAGE TO FSA RATE < 2 Hz FSA SAMPLING WINDOW 5 sec CANARDS EXECUTE DE-SPIN 1-2 sec SES SWITCH STATUS 1 sec min 2 sec min Closed Open MISSION COMPUTER DEPLOYS CANARDS •Unique Excalibur spin profile •Spin switch closed initially (spin rate >7hz) •Spin switch opens after canard deployment (spin rate <2hz) •Delta spin detected within 5 second window where canard deployment occurs •Allow 2 seconds after canard deployment event for dampening of mechanism Variable time based on mission 12 ARM Energy 1st Lock (Setback) Removed Battery Power Logic Power FPGA Power Up/Reset/BIT Logic Functions Safe Separation Timer Independent Safe Separation Timer Charge & Fire P.A. 2nd Lock Removed Recharge Fireset Armed S&A HOB Sensor Detonate IMPACT Launch Acceleration SPIN SIGNAL SYSTEM COMMANDS CHARGE DELAY IMPACT FPGA OUTPUT SYSTEM COMMANDS Initialize Detonation Mode Measure Spin Arm Excalibur FSA Logic Diagram 13 • FSA consists of electronics module and mechanical module • First Arming Environment is setback acceleration implemented mechanically • Second Arming Environment is detection of de-spin event using a “g” switch • Safe separation via independent timers • Point Detonate fuze is implemented by a g-switch opening at impact. • Delay after Point Detonate implemented by electronic timer • HOB function implemented by RF proximity sensor using production fuze components Key Features 1.730” DIA 4.165” Electronics Section Mechanical Section Out of Line Mech Setback G-switch Rotor Control Detonator Shorting Detonator Output Lead FPGA Power Up Logic Power Separation Timing Circuits Spin Sensing Arming Control Firing Control FSA Design Approach Concurred by Army & FMV Fuze Boards Excalibur Fuze Safe & Arm (FSA) Description 14 • Mechanical S&A Design Approach – Modified MK18 S&A • Higher G Loads • AFT Detonation Output • Switches Indicate Rotor Position • Integrated Electronics Control – Three (3) Leaf Set Back Mechanism S&A MECHANICAL DESIGN APPROACH Leaf Lock Rotor Drive Spring First Rotor Lock (Safe) Second Rotor Lock (Safe) Rotor Lock (Arm) 15 S&A ELECTRICAL DESIGN APPROACH • S&A Electronics – RS232 Serial Communication Link – Codeword Controls Function GN&C Second Rotor Lock W/PA Rotor W/Switches & M84 Detonator Safety Button Set Back Lock Second Safety & Arm Lock Piston Actuator 16 Spin Switch Excalibur Electronic Flex Assembly Module Fire Capacitor FPGA Impact Switch Independent Timer Spacers 17 RTV Potting around Spin Switch Connector (Interface with Mechanical S&A) Cap (Pressed Into Housing) Housing Potting Fill Hole Alignment pin Excalibur FSA Electronic Sub-Assembly 18 19 Excalibur FSA 20 Booster (1” Ø by 1”) PA509 Lead (.242” Ø dia by .980”) M84 Detonator (.194” Ø by .37”) Gap = .024 / .047 “ Gap = .037 / .095 “ Stainless Steel 17-4 .006 / .012 Thick Gap = .000 / .020 “ Explosive Train 21 22 FSA Design Summary • Resulting Capabilities – Meets MIL-STD-1316D – Interactive W/ GN&C – Maximized Overhead Safety • Independent Timer • Arm Command issued Just Prior to Endgame – Excalibur was Fielded in May 2007 for Operation Use M982 ERGM 23 S&A Program Milestones • M982 (Excalibur) S&A – Completed Design Analysis, Design Verification Testing, Qualification, and AFSRB Certified – The Excalibur System was Fielded in May 2007 and is Currently in Operational Use – KDI is Under Contract to Develop a Low Cost ESAD Alternative S&A Design • ERGM EX87 S&A – Finished DVT – ERGM has been terminated. The requirement for a guided extended range munition is still valid. NAVSEA is currently restructuring the program. 24 Excalibur ESAD Development • Development team consisted of members from KDI, ARDEC fuze group at Picatinny and Adelphi • Development program objectives accomplished – Drop-in replacement with existing S&A – Lower Unit Production Cost – Increased reliability – Hardware tests used to mitigate initial high risk areas – 1st Environment sensor designed, developed and tested – AFSRB informal and formal review completed – Preliminary Design Review completed • Electrical and mechanical design completed – Functional hardware fabricated and tested • Explosive function test success • ARDEC airgun and railgun mechanical shock tests successfully completed (gun launch simulated) • EGLIN AFB howitzer hard target penetration tests successfully completed