High-precision time synchronization method of inter-stage separation flight control system
A flight control system and inter-stage separation technology, applied in the general control system, control/adjustment system, test/monitoring control system, etc., can solve the problems of low accuracy of time system marks, achieve high reliability, improve safety, The effect of improving the fault tolerance rate
Pending Publication Date: 2019-10-01
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
[0006] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to propose a high-precision timing method for the inter-stage separation flight control system, to improve the fault tolerance rate of the inter-stage separation timing flag, and to eliminate the need for switching resources of the rocket flight control computer. The problem of matching the needs and the circuit, solving the problem of relatively low accuracy of using only the short-circuit ring of the separated connector as the time system mark
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[0135] When using the RS-422 interface "separation command" as a time mark, the delay of command transmission consists of 3 parts:
[0136] 1) Delay 1: The rocket flight control computer enters the separation process until it starts to send the RS-422 interface "separation command" data frame. The shortest "delay 1" is close to 0, and the longest is the rocket flight control software operating cycle;
[0137] 2) Delay 2: The rocket flight control computer starts to send the first byte of the RS-422 interface "separation command" data frame, and the aircraft flight control computer stores all the data frames in the serial port receiving buffer, and "delay 2" is a fixed value , the time is divided by the total number of digits of the "separation instruction" data frame divided by the transmission baud rate of the RS-422 interface;
[0138] 3) Delay 3: The flight control computer of the aircraft starts to read the data in the serial port receiving buffer until it checks and extra...
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The invention relates to a high-precision time synchronization method of an inter-stage separation flight control system. The high-precision time synchronization method of the inter-stage separation flight control system is used for providing a redundant time synchronization mark for an aircraft in an aircraft and carrier rocket inter-stage separation process, so that the aircraft determines the autonomous flight start control time range, wherein the main time synchronization mark is an RS-422 interface communication separation instruction sent to the aircraft by the rocket; to avoid start control time delay due to communication error and frame loss, a start control delay mark is set in each frame of separation instruction; the aircraft receives the start control delay basis of the effective separation instruction; and a standby time synchronization mark is the conduction state of a short circuiting ring in a separation connector providing electric connection for the rocket and the aircraft. The method can provide precise and reliable time synchronization marks for the aircraft in the inter-stage separation process.
Description
technical field [0001] The content of the present invention relates to a high-precision time statistics method for an inter-stage separation flight control system. Background technique [0002] During the flight of the aircraft and launch vehicle assembly, when the inter-stage separation conditions are met, the rocket generally initiates and controls the inter-stage separation process. control within the range. The time for the aircraft to start and control is related to the success or failure of the mission. If the aircraft is controlled in advance, the rudder surface of the aircraft is not out of the interference area of the rocket flow field, and there is a risk of reverse rudder effect, which will cause the attitude of the aircraft to be unstable. If the aircraft is delayed control, there is a long uncontrolled free movement time, which also causes attitude instability. [0003] The start and control time of the aircraft is usually after the electrical and mechanical...
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IPC IPC(8): G05B23/02
CPCG05B23/0283G05B2219/24065Y02P90/02
Inventor 邹凯刘哲周月荣王长峰潘宏椂关发明罗小云
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS