A launch vehicle digital power supply and distribution control system and its test method

Abstract

The invention discloses a digital power supply and distribution control system for a carrier rocket and a testing method thereof. The digital power supply and distribution control system for a carrier rocket includes a plurality of switches; the plurality of switches receive digital commands sent by the ground measurement, launch and control through the Ethernet to perform closing. Or disconnect action; the digital power supply and distribution control system of the launch vehicle sends the collected test data to the ground test launch control for analysis through Ethernet. This application transmits digital instructions and test data through Ethernet, which solves the problem that the cables used for ground test, launch and control become redundant loads on the arrow because they are no longer used after the rocket takes off.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a digital power supply and distribution control system for a launch vehicle and a testing method thereof. Background technique [0002] Compared with digital circuits and bus communication, the power supply and distribution system of my country's launch vehicles develops relatively slowly. The traditional power distribution control system and testing require many cables. Due to the needs of ground testing and logic control, many cables are directly led to the ground test and control system, and the ground test and control system performs multi-channel power distribution control, which greatly increases the number of arrows. The weight of the upper cable network, and many of these cables will not be used after take-off, these cables become unnecessary loads, affecting the rocket's carrying capacity. [0003] There are often multiple power supply and distribution systems on the launch veh...

AI Technical Summary

Problems solved by technology

[0004] Most of the traditional power distribution still adopts the control method of electromagnetic relay, which has the following defects: First, in order to ensure reliable power distribution and testing needs, it is necessary to adopt a redundant design in which multiple electromagnetic relays are connected in parallel through welding wires, and then through welding wires Connect the relay to the external connector, and use cables to build a large number of logic control circuits

Although this method is simple, it is heavy

Second: The electromagnetic relay is large in size, which is not suitable for soldering on the circuit board, and is not conducive to the integrated design of the equipment. Therefore, the traditional relay and distributor are often set up as a separate device, occupying the space on the arrow.

Third: The electromagnetic relay has a certain mechanical structure, and sometimes there will be abnormal contact of the electromagnetic relay due to environmental problems such as vibration and shock

Fourth: The electromagnetic relay is to adjust the on-off of the circuit by generating a magnetic attraction armature through the electrification of the coil. Because the coil has a certain inductance, electromagnetic interference signals are easily generated during the on-off process of the circuit. This is why it is difficult for electromagnetic distributors to pass the national military standard. The reason for the electromagnetic compatibility test, there are certain hidden dangers

Fifth: The driving mode of the electromagnetic relay leads to a longer response time for its shutdown, and the switching transient effect has a greater impact on the test results

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