SU754721A1 - Redundancy device - Google Patents

Description

The invention relates to computing and can be used in control machines.

A device for switching on backup equipment is known, which contains redundant blocks and the majority element [Ϊ].

The disadvantage of this device is low reliability. Ιθ

A redundant device is known, consisting of redundant blocks, a majority element, keys, and an equivalence element (2].

However, this device is not sufficiently reliable due to the fact that the occurring failures in switchable units affect the operation of the entire device.

The purpose of the invention is to increase the reliability of the device.

In order to increase reliability, a redundant device in a city of channels, containing in each channel (a redundant block, connected via a majority element with a corresponding key, a common OR element and an unequalities element, an AND element, a trigger OR element are introduced in each channel, and exit reserve — 30

2

The block of each channel is connected to the first input of the ΗβββΒΗς value element, the second input of which is connected to the output of the reserved block (η + 1) channel, and the third input to the output of the And element, the first input of which is connected to the corresponding input of the And element (Π + 1) channel and trigger output (y + 2) channel, and the second input - with trigger output (η + 1) channel and corresponding input element I '(n + 2) channel, while you-, element stroke' the inequalities of each channel is connected to the trigger output, the other input of which is connected to the reset bus, and the output Erez OR element - with the input of the respective key and the respective input common OR element whose output is connected to the common bus, in addition to other inputs of all the channels or elements are connected to the control tires.

The drawing shows the block diagram of the device for η * 3, where η is the number of channels.

Redundant device contains redundant blocks 1,2,3 connected to inequality elements 4-6 and to majority element 3

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that 7. Inputs of the inequalities 4, 5, 6 are connected to the corresponding elements AND 8 - 10, and the outputs - with the inputs: triggers 11 - 13, the other inputs of which are connected to the reset bus 14. The outputs of the trigger 11 13 are connected to the corresponding inputs of the element OR 15 and through the elements OR 16-18 - to the keys 19-21, connected to the power source 22. Other inputs of the elements OR 16-18 are connected to the control buses 23-25. The output element OR 15 is connected to the output 26 of the device.

The device works as follows.

When all the reserved blocks 1–3 from the outputs of the 4–6 inequality elements are working properly, the signals “0” are output, while the triggers 11–13 are in the reset state and at the outputs of the AND 8–10 elements and the OR 16–18 elements are issued signals;

'' 0 ’'. These signals open the keys 19-21, and the power source 22 is connected to the majority element 7. At the output of the OR 15 element, a sinal ’Ό * 'is issued, indicating that there are no failed blocks.

If one of the reserved blocks, for example, block 1, fails, the outputs of the unequalities 4 and 6 generate signals' ¹ 1 '', which set the triggers 11 and 13 to the state '1' ¹ . As a result, the output of the element And 9 produces a signal that blocks the operation of the element of inequality · 5. Signals''1' * from the outputs of the flip-flops 11 and 13 are received through the elements OR 17 and 18 to the keys 19 and 21, which disconnect from the power source 22 the corresponding buses of the majority element 7.

As a result, the failure of unit 3 does not affect the operation of the device, which increases the reliability of the redundant device.

'Beyond key management 19 and 21 signals ’ch'? from the outputs of the triggers 11

- and 13 are sent to the element OR 15, from the output 26 of which a signal is issued, indicating the presence of a failure in the device. Thus, it is possible to monitor the state of the redundant device for

Taking further measures to eliminate the failure.

The presence of a bus in the device - reset 14 and control buses 23, 24, 25 allows using external signals to control the disconnection from the majority element 7 of any of the failed blocks 1,2, 3 after localization carried out by special means (test diagnostics), which increases ease of use of systems containing redundant devices.

Claims (1)

Claim Redundant device for p-channels, containing a redundant block in each channel, connected through a majority element with a corresponding key, characterized in that, in order to increase reliability, a common OR element is introduced into each channel and an unequality element And, trigger and the element OR; 25 and the output of the reserved block of each channel is connected to the first, input of the unequal element, the second input of which is connected to the output of the reserved block (η + 1). -kA, and the third input is connected to the output of the And element, the first input of which is connected to the corresponding input of the And element (η + 1) - channel and trigger output (n + 2) - channel, and the second input 35 with trigger trigger (η + 1) channel and the corresponding input of the element I (n + 2) channel, with the output of the unequal element of each channel connected to the trigger input, . the other input of which is connected to the reset bus, and the output through the OR element - with the input of the corresponding key and the corresponding input of the common OR element, the output of which is connected to the common bus, in addition other inputs 45 elements OR of all channels are connected to control buses.