Researched on Initiation Synchronization of Addressable Initiation System

Addressable initiation system was established by bus topology structure and information coding which owns the ability to safely and reliably control up to 256 initiators on a signal bus according to the communication protocol which is a robust two-way command response type protocol. Also, the two-way digital communication was achieved between intelligent bus controller and smart initiator by multiplexed serial data bus. The synchronous performance of addressable initiation system was researched. The result shows that each smart initiator will performance the built-in logic control, and arm electronic safe switch after receiving the synchronous signal sent by intelligent bus controller. Then they discharged the electrical energy of the firing capacitor as approximately synchronous, and were initiated synchronously at 4±0.2μs. It indicates that this initiation system has favorable synchronization.


Introduction
Initiation system as the control center of weapons and ammunition system, responsible for safeguarding the warhead-war and wartime timely and reliable security arming and detonation operations, etc.With the developing of weapons systems toward miniaturization, low power, high accuracy, high damage, the addressing detonation initiation system is emerging which revolutionary transforms the initiation system from the typical centre firing control to the centralized control and distributed initiation [1].In paper, the addressable initiation system was established by bus topology structure and information coding.Also, the two-way communication was achieved between intelligent bus controller and smart initiator by multiplexed serial data bus.Intelligent bus controller can centralized control every smart initiators on bus and achieve multi-mode initiation of smart initiator.Also, the initiation synchronization, which is very important in weapons systems such as missile warhead, spacecraft solar panels unfold, solid rocket motor ignition, has been researched of the system.

Addressable Initiation System Design
The addressable initiation system was designed, and shown in Figure 1, which consists of intelligent bus controller, data bus, a number of smart initiators and communication protocols [2,3].Intelligent bus controller can send identity address (ID) and instruction to all smart initiator on the initiation bus [4,5].As each smart initiator received an ID, they will compare the ID with their own ID store in ROM.If the received ID of each smart initiator is entirely same with self ID, it will execute pre-set instruction, and release energy store in capacitance to fire the energy device such as

Fig. 1. Schematic of addressable initiation system
Intelligent bus controller as a initiation system central nervous system, centralized control the all action of the system.Shown in figure 2, it was designed including two energy regulation circuit, micro-control circuit, communication circuit and electronic Safe/Arm circuit.It receives instruction and energy from guidance and control unit, also control the instruction and the energy to reach every specified initiator.And then, it will receive the feedback information of the smart initiator, and continue to feedback the results of the implementation of the directive to the guidance and control unit.

Energy regulation circuit
Micro

Fig.2. schematic of intelligent bus controller
Smart initiator was designed by using microelectronic integrated design technology.Shown in figure 3 and figure 4, some function circuits were integrated within it including anti-electromagnetic interference and (EMI) Static electricity (ESD)circuit, information identifying circuit, micro-control circuit, electronic safe/arm circuit, energy storage circuit, fire circuit and semiconductor bridge.GCMM matecconf/201 3002 initiation function.And other spurious signals will be rejected by the information identifying circuit in order to achieve a rapid addressing of the initiator.In addition, the anti-electromagnetic electronic circuit was designed in smart initiator, so that the information identifying circuit with anti-interference ability which can prevent accidental initiation caused the error identification.It will improve the safety and reliability of smart initiator.Static electronic is great harm for electrical explosion devices (EED), and must design antistatic electronic circuit in smart initiator.Due to the different characteristics of antistatic with each circuit, so two-stage anti-static circuit was designed.Information identifying circuit and logic control circuit is protected by semiconductor discharge transistors and TVS diodes.And then semiconductor bridge and electronic switch is protected by the CMOSFET which is sensitive to electrostatic.In addition , between the information identify circuit and logic control circuit designed the magnetic isolation circuit.Even in the case of a faulty initiator in system, it does not result in paralysis of the entire bus network.

Experiment and Analyses
The synchronization of initiation system is harsh demanding in the weapons systems such as missile warhead, spacecraft solar panels unfold, solid rocket motor ignition and other weapons systems.Therefore the synchronous performance of addressing detonation initiation system will be developed in this paper.Experiments using three-point addressable initiation system, three channel current loop use for testing the current characteristics of firing capacitor discharge, three channel oscilloscope probe use for test the voltage of across the semiconductor bridge chip, and three channel DET10A photo-detectors was be used to test the initiation output performance of SCB initiator.Experiment principle as shown, including the intelligent bus controller, data bus, signal couplers, three smart initiators, oscilloscope, current loop and photo-detectors.Each smart initiator integrates a 47μF firing capacitor and it charge voltage is 15V.

Summary
The synchronization of initiation system is harsh demanding in the weapons systems such as missile warhead, spacecraft solar panels unfold, solid rocket motor ignition and other weapons systems.Therefore the addressable initiation system was designed and this system has demonstrated the ability to arm and fire 256 initiators on a single bus .Also the synchronous performance of addressable initiation system was researched.The result shows that each smart initiator will performance the built-in logic control, and arm electronic safe switch after receiving the synchronous signal sent by intelligent bus controller.Then they discharged the electrical energy of the firing capacitor as approximatively synchronous, and were initiated synchronously at 4±0.2μs.It indicates that this initiation system has favorable synchronization.

Fig. 4 . 2016 MATEC
Fig.4.Integrate smart Initiator Each smart initiator has a unique address code ID stored in micro-control circuit ROM.It can be ID to finish the safe/arm and fire function.Only receive Instruction signals consistent with their ID, smart initiator will carry out the

Fig. . Fig. 8 .Fig. 9 .
Fig. .Graph of firing current characteristic SCB), hot wire and bridge film which will result to fire charge sequence, and output strong explosion waves.If two ID is completely different, the smart initiator will stop all the action and wait for next ID and instruction which are sent by intelligent bus controller until two ID are completely match each other.The system is an electronically addressable, low power ordnance initiation system, consisting of a controller, smart initiators, and wire ham.