Method for software and hardware crashing detection and resetting of airborne collision avoidance system

A technology of an airborne anti-collision system and a reset method, which is applied in the field of software and hardware crash detection and reset of the airborne anti-collision system, can solve problems that affect the safety of the aircraft, affect the use of the anti-collision system, and have no detection and recovery mechanism. The effect of enhancing reliability

Active Publication Date: 2017-01-11
四川九洲空管科技有限责任公司
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AI Technical Summary

Problems solved by technology

Therefore, when the TCASII airborne collision avoidance system has a software infinite loop or a hardware CPU crash due to various situations, the entire TCASII airborne collision avoidance system will fail, which will directly affect the use of the entire anti-collision system and affect the safety of the aircraft.
[0004] In the existing technology, the TCASII airborne collision avoidance system lacks a watchdog system, so that when the aircraft is in a complex electromagnetic environment or harsh weather conditions, due to electromagnetic interference or single event reversal, the software enters an infinite loop or the CPU enters a dead state , in the case of unrecoverable, there is no effective detection and recovery mechanism, which will cause the TCASII airborne collision avoidance system to fail

Method used

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  • Method for software and hardware crashing detection and resetting of airborne collision avoidance system
  • Method for software and hardware crashing detection and resetting of airborne collision avoidance system
  • Method for software and hardware crashing detection and resetting of airborne collision avoidance system

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specific Embodiment 1

[0038] Such as figure 1 and figure 2 As shown, in this specific embodiment, the TCASII airborne collision avoidance system is taken as an example, and the hardware watchdog module is implemented by using FPGA to reset the CPU.

[0039] A hardware crash detection and reset method of an airborne anti-collision system, the specific method steps are:

[0040] 1. The airborne collision avoidance system is activated;

[0041] 2. Determine whether the CPU module has a dog feeding action to the hardware watchdog module within T1 seconds, if yes, go to the next step; if not, the hardware watchdog module sends a reset signal to the CPU module to make the CPU module enter reset , enter the previous step;

[0042]3. When the CPU module gives the dog feeding signal for the first time, the hardware watchdog module starts the dog feeding detection timer, and the CPU module starts the periodic dog feeding action according to the set dog feeding timing cycle time threshold T2 seconds, ever...

specific Embodiment 2

[0046] On the basis of specific embodiment 1, the method also includes, in step 2, setting the reset times threshold M for the CPU module to be reset by the hardware watchdog module, and when the reset times of the CPU module reaches the threshold M, the CPU If the module still does not feed the dog to the hardware watchdog module, the hardware watchdog module gives the last CPU module reset signal and enters the exception handling mechanism; the M is a natural number greater than or equal to 1. In this specific embodiment, M=1, that is to say, if the CPU module still does not have any dog ​​feeding action after the second T1 seconds, it will give the last CPU module reset signal and enter into exception processing.

[0047] The exception handling mechanism is: the hardware watchdog module no longer detects the dog feeding action of the CPU module, that is, no longer sends a reset signal, and records the fault to a designated location. In the watchdog module shared by multiple...

specific Embodiment 3

[0049] On the basis of the specific embodiment 1 or 2, the method also includes, when the watchdog hardware module finishes triggering the reset signal of the CPU module each time, recording the reset signal, and reading the record after the CPU module starts, And record the situation in the watchdog monitoring log.

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Abstract

The invention provides a method for software and hardware crashing detection and resetting of an airborne collision avoidance system. The method has the advantages that a hardware watchdog technique, a software watchdog technique and a software and hardware combining watchdog technique are adopted for a TCASII (traffic collision avoidance system-II) airborne collision avoidance system; by detecting whether a CPU (central processing unit) module and a software process have a dog feeding action or not, the real-time monitoring and timely resetting can be performed; the fault of the TCASII airborne collision avoidance system can be timely monitored, the timely online resetting is realized, the fault is released on line, and the reliability of airborne collision avoidance equipment is improved.

Description

technical field [0001] The invention relates to a software and hardware crash detection and reset method of an airborne anti-collision system, in particular to a software and hardware crash detection and reset method suitable for a TCASII airborne anti-collision system. Background technique [0002] TCASII is an integrated airborne collision avoidance system, which is mainly used to provide air safety separation guarantee for aircraft to achieve the purpose of collision avoidance. By inquiring, receiving, and processing the response signals of other aircraft's transponders, it monitors other aircraft around, and calculates the flight trend of other aircraft within the monitoring range relative to its own aircraft, and gives traffic warning and decisive warning suggestions. [0003] The TCASII airborne collision avoidance system itself has many functions, and the data processing is extremely complex. Therefore, ensuring the stability and correctness of the TCASII airborne col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/22G06F11/36
CPCG06F11/2236G06F11/3668
Inventor 马少阳李涛郭小杰郑红段建军
Owner 四川九洲空管科技有限责任公司
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