WELCOME TO ALL !!!WELCOME TO ALL !!!

By: Anuja GanjiwaleShilpa Jotawar

Pooja Shejawale

Guided By: Prof.S.I.Nipanikar

Introduction Problem Definition Qualitative Requirements Flow Chart Block Diagram Working Features Applications Future Scope Conclusion References

Torpedo Underwater missile. Delivers a payload to designated target.

Safety Arming Mechanism Vital link between System & Payload Ensures safety of torpedo during handling, transportation, storage & launch. Initiates payload at desired time & desired place.

Subsystems Mechanical Subsystem Electronic subsystem

Provision of Safety interlocks during handling, transportation, storage & Launch

Removal of Interlocks at various stages of flight

Redundant Sequence

Functional Requirements :

Launch

Depth sensing

Activation of CPLD

Firing of pyro devices

Sterilization

Generation of firing signals

Safety Arming Mechanism (SAM)

Arming & Detonating Mechanism (ADM) Electronic Control Unit (ECU) Torpedo Battery Depth Sensor DC-DC Converter Complex Programmable Logic Device (CPLD) Power Extension Circuit Charging Circuit Firing of Pyro Devices Sterilization

Low power consumption & high speed design.

VLSI design using Complex Programmable Logic Device (CPLD)

based embedded electronics system.

Isolation of ground for high & low voltages.

Flexibility in programming of events.

Fullproof design by implementation of coding in proper sequence.

Redundancy in firing circuits for alignment & initiation of

explosive trains for improvement of reliability of functioning.

Isolation of electronics with explosive elements.

It withstands heavy shocks & vibrations during launch of torpedo.

EMI / EMC compatibility design.

Sterilization capability.

Underwater weapons.

Missiles.

Air craft bombs.

Nuclear Weapons.

Fiber Optic wire Guidance can be used. This makes the system immune to any electronic interference.

Use of improved countermeasures and sensors like metal detectors which can detect ships easily.

Additional circuitry of GPS (Global Positioning System) can also be placed on the torpedo for the purpose of tracking the path of the torpedo when the control unit is at a farther place from it and also at the time of loss.

With the help of the Radar systems we can also check the presence of various mobile or non-mobile objects in its vicinity.

A step-by-step approach in designing the CPLD Based Embedded System for Safety Arming Sequencer has been followed.

This system provides a greater stability, security, reliability and has added a great amount of safety to the existing systems used for Defence applications.

The system has successfully overcome the shortcomings of the existing systems by meeting sterilization requirement in order to achieve safe recovery of torpedo. It will add new dimensions in the field of defence technology.

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