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Fuzing

Fuzing. Naval Weapons Systems. Introduction. Why do we have a fuze? Trigger explosive reaction Keep weapon safe when not needed Must be reliable and dependable Safing and Arming Mechanism. Functions of the Fuze. Keep weapon safe Arm weapon Recognize or detect target Initiate detonation

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Fuzing

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  1. Fuzing Naval Weapons Systems

  2. Introduction • Why do we have a fuze? • Trigger explosive reaction • Keep weapon safe when not needed • Must be reliable and dependable • Safing and Arming Mechanism

  3. Functions of the Fuze • Keep weapon safe • Arm weapon • Recognize or detect target • Initiate detonation • Determine direction of detonation • Special Fuzes only

  4. Basic Fuzing System Warhead Target Detecting Device TDD (sensor) Safing And Arming Device Warhead Explosive Output Lead Detonator

  5. Target Detection Device

  6. Target Detection Device (Four Basic Categories) • Impact or Contact • Ambient - Environmental factor • Timer • Proximity

  7. Proximity Fuzes: Active Semi-Active Passive Timed Fuzes Point Detonating Fuzes Delay Fuzes Command Detonated Fuzes Fuze Classificationby fuze operation

  8. Proximity Fuzes Active Semi-Active Passive

  9. Safing & Arming Mechanism • Safety & Arming Sensor: • Barrier between the TDD and the warhead • Can be physical or mechanical

  10. Activation Forces • Used to arm the warhead • Time • Acceleration (Setback) • Deceleration (Creep) • Centrifugal • Impact

  11. Redundancy in Fuze System • Safety - Devices placed in series in firing path for safety. • Arming - Components placed in parallel in firing path for arming & firing reliability.

  12. Detonators and Target Sensorsarranged in parallel for reliability Safety and Armingdevices arranged in seriesfor safety A A B B A F F A S S F F S S B F S S F B F S S F S F F F System S S S F System Redundancy in Fuze System

  13. Questions?

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