CN102339241A - Method for preventing backup machine from mistakenly taking over control right of host bus - Google Patents

Method for preventing backup machine from mistakenly taking over control right of host bus Download PDF

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Publication number
CN102339241A
CN102339241A CN201110266694XA CN201110266694A CN102339241A CN 102339241 A CN102339241 A CN 102339241A CN 201110266694X A CN201110266694X A CN 201110266694XA CN 201110266694 A CN201110266694 A CN 201110266694A CN 102339241 A CN102339241 A CN 102339241A
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CN
China
Prior art keywords
signal
control
backup machine
host
level
Prior art date
Application number
CN201110266694XA
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Chinese (zh)
Inventor
张朝霞
Original Assignee
中国航空工业第六一八研究所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 中国航空工业第六一八研究所 filed Critical 中国航空工业第六一八研究所
Priority to CN201110266694XA priority Critical patent/CN102339241A/en
Publication of CN102339241A publication Critical patent/CN102339241A/en

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Abstract

The invention belongs to technology for controlling a host computer and a backup computer of an inertial navigation system, and relates to an improved design of giving up a control right of a bus to a backup machine to control after a host has faults, in particular to a method for preventing the backup machine from mistakenly taking over the control right of a host bus. A control circuit of the bus right comprises the host and the backup machine. When the host has faults, the host outputs a big watchdog signal with a level of 0 (when the host is normal, the host outputs a big watchdog signal with the level of 1); the backup machine receives the big watchdog signal with the level of 0 and outputs a take-over signal with a level of 0 (when the host is normal, the backup machine outputs the take-over signal with a level of 1); and meanwhile, the take-over signal controls a backup machine enable bus control signal and a seal host bus control signal, so that the aim of taking over the right to the backup machine to work when the host has the faults is fulfilled. In the invention, by the least improvement, the deign defects are overcome; the problems that when the backup machine is halted or has the faults to mistakenly send the take-over signal so that a bus control signal is taken over when the host is normal, a system is degraded and faults are misreported are solved; the reliability and the stability of an inertial navigation system are improved; the fault rate of the system is reduced; and the maintenance cost of the system is saved.

Description

Prevent to back up the method that chance error is taken the host bus control by force

Technical field

The invention belongs to the active and standby Computer Control Technology of inertial navigation system, relate to inertial navigation system backup machine contention bus control prevented to back up the method that chance error is taken bus control right by force.

Background technology

Because the phenomenon of " deadlock " and wrong report fault often appears in inertial navigation system; Through discovering: because the inertial navigation system host design has " little house dog " signal, " big house dog " signal; When " little house dog " signal fault level "0"; Host design have reset with 2 kinds of active modes of non-shielding interval, can make " little house dog " signal recover normal level"1"; During " big house dog " signal fault level "0", system host does not activate.The backup machine design signal output level"1" of will seizing power earlier, when " big house dog " signal level "0" of input, the backup machine signal output level "0" of will seizing power reaches the purpose of seizing power.Cause taking the host bus control by force at backup machine " deadlock " or " walking to fly " mistiming, make main frame can't obtain the normal interface signal, cause reporting by mistake fault, system can't operate as normal.

Summary of the invention

The objective of the invention is: improve to the active and standby computing machine of the inertial navigation system problem that control exists of seizing power; Solve because backup machine fault " deadlock " or " walking to fly " mistiming are taken the host bus control by force; Make main frame can't obtain the normal interface signal; Cause reporting by mistake fault, system can't operate as normal prevents to back up the method that chance error is taken bus control right by force.

Technical scheme of the present invention is: through the signal of seizing power with main frame " big house dog " signal envelope backup machine, i.e. the backup machine signal effective method of seizing power when main frame is unusual only solves the backup chance error problem of seizing power.The control circuit of bus power comprises main frame, backup machine; It is characterized in that: the control end that enables of the OC door that band enables to control joins with " big house dog " signal end; The input end of the band OC door that enables to control joins with the signal end of seizing power of backup machine, be with the output terminal of the OC door that enables to control be connected to respectively main frame envelope bus control signal and backup machine enable bus signals; Pull-up resistor R1 joins with the output terminal of the OC door that band enables to control; It is level"1" that main frame is just often exported " big house dog " signal; The OC door that enables to control through band, backup machine is enabled bus signals to pull-up resistor R1 and main frame envelope bus control signal is changed to level"1"; Output during hostdown " big house dog " signal level "0"; When backup machine receives " big house dog " signal level "0", the output level "0" signal of seizing power, the signal of seizing power that the OC door that band enables to control will receive when " big house dog " signal level "0" is exported to backup machine and is enabled the bus signals level "0"; Operator trunk and to main frame envelope bus control signal level "0", inoperation bus.

Advantage of the present invention is: the OC door that draws 2k resistance R 1, band to enable to control in the present invention's increase; Reach at " big house dog " the normal level"1" of signal; Be main frame just often; Backup machine is enabled bus signals and main frame envelope bus control signal be changed to level"1", the envelope backup machine signal of seizing power, reaching main frame can control bus and operate as normal; At " big house dog " signal level "0", promptly during hostdown, goalkeeper OC that band enables the to control signal of seizing power is exported to backup machine and is enabled bus signals and main frame envelope bus control signal, reaching the commentaries on classics backup machine work of normally seizing power.

Through exposed problems in the equipment use, find out the defective that exists in the former design, and through minimum change; Solved because backup machine " deadlock " or " walking to fly " mistake are sent out the signal of seizing power; Cause just often being snatched away bus control signal, make system's degradation, the problem of wrong report fault at main frame.Improve the reliability and stability of inertial navigation system, reduced the failure rate of system, practiced thrift the maintenance cost of system.Then improve the reliability of inertial navigation system, reduce the failure rate of system, promote the fighting capacity of my army, proposes a kind ofly inertial navigation system is prevented to back up chance error to take the improvement of bus control right by force and design.

Description of drawings

Fig. 1 is the prior art schematic diagram;

Fig. 2 is a theory diagram of the present invention.

Embodiment

Explain further details in the face of the present invention down.

The control circuit of bus power comprises main frame 1, backup machine 3; The control end that enables of the OC door 2 that band enables to control joins with " big house dog " signal end; The input end of the band OC door 2 that enables to control joins with the signal end of seizing power of backup machine 3, be with the output terminal of the OC door 2 that enables to control be connected to respectively main frame 1 envelope bus control signal and backup machine 3 enable bus signals; Pull-up resistor R1 joins with the output terminal of the OC door 2 that band enables to control; It is level"1" that main frame 1 is just often exported " big house dog " signal; The OC door 2 that enables to control through band, backup machine 3 is enabled bus signals to pull-up resistor R1 and main frame 1 envelope bus control signal is changed to level"1"; Output during main frame 1 fault " big house dog " signal level "0"; When backup machine 3 receives " big house dog " signal level "0", the output level "0" signal of seizing power, the signal of seizing power that the OC door 2 that band enables to control will receive when " big house dog " signal level "0" is exported to backup machine 3 and is enabled the bus signals level "0"; Operator trunk is also given main frame 1 envelope bus control signal level "0", inoperation bus.The present invention is through the signal of seizing power with " big house dog " signal envelope backup machine of main frame, i.e. the backup machine signal effective method of seizing power when main frame is unusual only solves the backup chance error problem of seizing power.The OC door 2 that draws 2k resistance R 1 and band to enable to control in former design, having increased.The contention control circuit of bus power comprises that the end that goes out that main frame 1, pull-up resistor R1, band enable to control joins; Main frame 1 is just often exported " big house dog " signal level"1", and the OC door 2 that enables to control through band, backup machine 3 is enabled bus signals to pull-up resistor R1 and main frame 1 envelope bus control signal is changed to level"1".Output during main frame 1 fault " big house dog " signal level "0"; When backup machine 3 receives " big house dog " signal level "0"; The output level "0" signal of seizing power; The signal of seizing power that the OC door 2 that band enables to control will receive when " big house dog " signal level "0" is exported to backup machine 3 and is enabled the bus signals level "0", and operator trunk is also given main frame 1 envelope bus control signal level "0", inoperation bus.

Claims (1)

1. one kind prevents to back up the method that chance error is taken the host bus control by force; The control circuit of bus power comprises main frame [1], backup machine [3]; It is characterized in that: the control end that enables of the OC door [2] that band enables to control joins with " big house dog " signal end; The input end of the band OC door [2] that enables to control joins with the signal end of seizing power of backup machine [3], be with the output terminal of the OC door [2] that enables to control be connected to respectively main frame [1] envelope bus control signal and backup machine [3] enable bus signals; Pull-up resistor R1 joins with the output terminal of the OC door [2] that band enables to control; It is level"1" that main frame [1] is just often exported " big house dog " signal; The OC door [2] that enables to control through band, backup machine [3] is enabled bus signals to pull-up resistor R1 and main frame [1] envelope bus control signal is changed to level"1"; Output during main frame [1] fault " big house dog " signal level "0"; When backup machine [3] receives " big house dog " signal level "0"; The output level "0" signal of seizing power; The signal of seizing power that the OC door [2] that band enables to control will receive when " big house dog " signal level "0" is exported to backup machine [3] and is enabled the bus signals level "0", and operator trunk is also given main frame [1] envelope bus control signal level "0", inoperation bus.
CN201110266694XA 2011-09-01 2011-09-01 Method for preventing backup machine from mistakenly taking over control right of host bus CN102339241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110266694XA CN102339241A (en) 2011-09-01 2011-09-01 Method for preventing backup machine from mistakenly taking over control right of host bus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110266694XA CN102339241A (en) 2011-09-01 2011-09-01 Method for preventing backup machine from mistakenly taking over control right of host bus

Publications (1)

Publication Number Publication Date
CN102339241A true CN102339241A (en) 2012-02-01

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CN (1) CN102339241A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050267703A1 (en) * 2004-06-01 2005-12-01 Bondurant Phillip D 2D and 3D display system and method for furnace tube inspection
CN101000591A (en) * 2006-12-30 2007-07-18 中国船舶重工集团公司第七一一研究所 Double-machine redundancy system based on embedded CPU
CN101498937A (en) * 2009-03-04 2009-08-05 中国科学院长春光学精密机械与物理研究所 Emulation test method for active thermal-control circuit of aerospace optical remote sensor
US20100114732A1 (en) * 2006-10-24 2010-05-06 Richard Hull Method and apparatus for creating and managing mediascapes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050267703A1 (en) * 2004-06-01 2005-12-01 Bondurant Phillip D 2D and 3D display system and method for furnace tube inspection
US20100114732A1 (en) * 2006-10-24 2010-05-06 Richard Hull Method and apparatus for creating and managing mediascapes
CN101000591A (en) * 2006-12-30 2007-07-18 中国船舶重工集团公司第七一一研究所 Double-machine redundancy system based on embedded CPU
CN101498937A (en) * 2009-03-04 2009-08-05 中国科学院长春光学精密机械与物理研究所 Emulation test method for active thermal-control circuit of aerospace optical remote sensor

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Application publication date: 20120201