Method for precisely controlling time delay of parachute opening device based on different temperatures

Abstract

A method for precisely controlling the time delay of a parachute opening device based on different temperatures, comprises the following steps: (1) after the starting of the ejection, high pressure fuel gas enters the thermal battery component of a parachute opening device from a seat control system, the thermal battery is activated, and the parachute opening device is powered; (2) the initialization of the parachute opening device system is conducted, the timer begins timekeeping, the power-on self-test of parachute opening device is conducted, and the preset delay time or artificially preset delay time is obtained from external memory according to the result of the power-on self-test; (3) the ambient temperature of the parachute opening device is obtained through a temperature sensor, the activation time of thermal battery is determined; (4) after the height of parachute opening device is determined and the height determining time is recorded, the real output delay time of the parachute opening device can be obtained by the following formula: real output delay time = preset delay time-thermal battery activation time-program running time-program running time; (5) executing the time delay action of the parachute opening device, and an ignition command is outputted. The accurate time delay output of the parachute opening device can be achieved at 55-70 DEG C, and the safety life saving performance of an ejection seat is improved at different temperatures.

Description

technical field [0001] The invention relates to a method for accurately controlling the time delay of an umbrella opener based on different temperatures, and is especially suitable for an umbrella opener system based on an ejection seat, and provides new technical ideas and solutions for the research and development of an umbrella opener. Background technique [0002] As the backup system of the ejection life-saving system, the parachute opener requires a reliable and accurate output delay time when the main control program controller fails, so as to ensure the normal ejection of the system. At present, the delay of the umbrella opener adopts the preset delay time minus the fixed activation time of the thermal battery. Due to the difference in the activation time of the thermal battery at different temperatures, the output delay error of the umbrella opener is relatively large (error ± 100ms), which affects ejection. life-saving performance. Contents of the invention [0...

AI Technical Summary

Problems solved by technology

At present, the delay of the umbrella opener adopts the preset delay time minus the fixed activation time of the thermal battery. Due to the difference in the activation time of the thermal battery at different temperatures, the output delay error of the umbrella opener is relatively large (error ± 100ms), which affects ejection. life saving performance

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