Rocket time sequence controller and control method

Abstract

The invention relates to a rocket control technology, in particular to time sequence control of a rocket. A rocket time sequence controller is characterized by comprising a power supply / distribution circuit, a time sequence control circuit and an ignition circuit; the controller adopts multiple safety protection measures; on hardware, the controller mainly depends on an initiating explosive device protection circuit to guarantee the safety of initiating explosive devices in the rocket storage, transportation and test process; the reliability of time sequence control output is improved by parallel connection of dual backups; on software, an even triggering mechanism is adopted, that is, when the time sequence controller receives a corresponding control instruction, the hardware can perform a corresponding action; after the performed action is correct, a state signal of finishing the action is returned; when a FPGA controls a flow, a corresponding state feedback signal is detected; and after the action is performed, a next action is performed. The rocket time sequence controller satisfies the resistance value testing and time sequence testing requirements of the initiating explosive devices before the rocket is launched, and guarantees the safety of the initiating explosive devices in the testing process.

Description

technical field [0001] The invention relates to rocket control technology, in particular to timing control of rockets. Background technique [0002] The timing control of small vehicles and uncontrolled rockets in my country is mainly realized by timers inside single-chip microcomputers or programmable logic devices (FPGA, CPLD, etc.). When using a single-chip microcomputer, a combination of a hardware timer and a software counter is often used; when a programmable logic device is used, a multi-bit counter is usually used. When the counting value of the counter is consistent with the set timing value, the timing signal is output to the driving circuit, and the driving circuit drives the distributor (mainly power supply and distribution and relay ignition circuit), and connects the ignition circuit of the pyrotechnic device. [0003] The previous timing controller design has the following deficiencies: [0004] (1) There is no timing parameter setting function, and it canno...

AI Technical Summary

Problems solved by technology

[0004] (1) No timing parameter setting function, unable to flexibly adapt to launch requirements

When the timing parameters need to be modified, the timing controller can only be disassembled and the timing controller program reprogrammed, and there is no test assessment after reprogramming the program, which reduces the reliability

[0005] (2) The counter adopts binary accumulative counting. If the main control chip is FPGA, during the accumulative process of the counter, there will be a metastable phenomenon in which several register gate circuits are flipped at the same time. Once it is the same as the set timing, it will malfunction. Normal ignition pyrotechnics

[0006] (3) The safety protection circuit of pyrotechnics is not designed, resulting in the two ends of pyrotechnics being in a suspended state during the whole rocket transportation or rocket testing process, which is unsafe

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