Design and Verification of Polymorphic Safety Logic Control Method for Cruise Ammunition Fuze Based on Electronic Safety System

doi:10.12382/bgxb.2022.0522

Abstract

Abstract:

To adapt to the transition of the safety state of the cruising missile ammunition in swarm combat and ensure reliable safety recovery and rearming, a polymorphic safety logic control method is proposed for cruise ammunition fuzes based on an electronic safety system. The decision result is selected as the target-based arming environment, and the input-output relationship between the two FPGAs of the electronic safety system and the polymorphic safety logic control process are determined according to the structure of the electronic safety system. Based on the established deprotection logic, the accidental failure rate of the fuze safety system before launch is analyzed and calculated, meeting the safety criteria. By designing two state machines running inside the FPGA to control the transition of the safety state of the cruise ammunition fuze and achieve polymorphic safety logic control, the feasibility is validated through simulation. Experiment results demonstrate successful realization of the designed safety state transition.

Key words: fuze, cruise ammunition, electronic safety system, polymorphic safety logic control

CLC Number:

TJ430

ZHANG Chuanhao, LI Haojie, GONG Xuefeng, CHEN Zhipeng, YU Hang. Design and Verification of Polymorphic Safety Logic Control Method for Cruise Ammunition Fuze Based on Electronic Safety System[J]. Acta Armamentarii, 2023, 44(10): 3079-3090.

Figures/Tables 17

Fig.1 Logic diagram of fuse release and recovery of cruise missiles

Fig.2 Diagram of overall security state transition

Fig.3 Signal input and output of the polymorphic safety control system

Table 1 System input and output and internal signals

信号	信号说明	信号	信号说明	信号	信号说明
env_1	一级保险环境信号	SW1	一级保险解保	C_FK	外围电路电容泄能反馈
env_2	二级保险环境信号	SW2	二级保险解保	En_XXX	各级保险使能信号
assignment	分配结果	SWD	目标基保险解保	XXX_sig	FPGA间传递信号
restore	恢复保险信号	SELF_FIRE	自毁信号
reset	安全重置信号	SWD_FK	目标基保险解保反馈

Fig.4 Polymorphic safety logic control flow algorithm

Fig.5 FPGA_Ⅰ internal running state machine

Fig.6 FPGA_Ⅱ internal running state machine

Fig.7 Schematic diagram of RTL simulation of polymorphic safety control system

Fig.8 Schematic diagram of FPGA_Ⅰ internal state machine simulation

Fig.9 Schematic diagram of FPGA_Ⅱ internal state machine simulation

Table 2 Description of each state and corresponding one-hot code encoding

FPGA_Ⅰ 状态说明	编码	FPGA_Ⅱ 状态说明	编码
IDLE 初始安全状态	00_000_001	IDLE 初始安全状态	000_000_001
REC_SW1 环境信号1 识别成功状态	00_000_010	pre_SW1 等待状态	000_000_010
SW1_ARM 一级保险解保状态	00_000_100	SW1_ARM 一级保险解保状态	000_000_100
SW2_ARM 二级保险解保状态	00_001_000	TIME 时间窗	000_001_000
REC_SWD 任务分配决策识别成功状态	00_010_000	REC_SW2 环境信号2 识别成功状态	000_010_000
SWD_ARM 待发状态	00_100_000	SW2_ARM 二级保险解保状态	000_100_000
LOCK 安全锁定状态	01_000_000	SWD_ARM 待发状态	001_000_000
ERROR 故障状态	10_000_000	LOCK 安全锁定状态	010_000_000
		ERROR 故障状态	100_000_000

Fig.10 Simulation results when environmental signal 2 does not appear within the time window

Fig.11 Simulation results of uninsurance after reinstatement

Fig.12 Simulation results during recycling

Fig.13 Simulation results of set time self-destruct signal output

Fig.14 Output waveforms when all levels of insurance are released normally

Fig.15 Output waveform of releasing insurance after recovering insurance

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