SU1325485A1 - Device for majority selection of signals - Google Patents

Abstract

The invention relates to automation and computing and is intended to work in redundant devices. The purpose of the invention is to improve noise immunity. The device for the majority selection of signals contains registers 1-3, in which information is stored that comes from the outputs of three of the same type, HHtp.l (L

Description

reserving blocks. The signals for monitoring the health of the blocks arrive at the inputs R (reset) of the registers. Via jumpers, the input R can be connected to the input of the IN (inverting) circuits. The outputs of the registers are connected to the inputs of the majority element 4. The health control lines are connected to the inputs of the majority element 7, the output of the socket

The invention relates to automation and computing and is intended for operation in redundant systems.

The purpose of the invention is to improve the noise immunity of the device by providing a fixed fixed value of the output control signal when it crashes in redundant blocks.

. The drawing shows a diagram of the device.

The device contains registers 1-3, the first major element 4, the elements OR 5 and 6, the second major element 7.

In the receiving registers 1-3, information stored from the outputs of three units of the same type reserving each other is stored. The signals for monitoring the operability of the blocks are received at the inputs R (reset) of the registers. Via transmics, the input R can be connected to the input IN (inversion). The outputs of the registers are connected to the inputs of the majority element 4,

The health control lines are connected to the inputs of the majority element 7. The output of the majority element 7 is connected to the inputs of the elements OR 5 and 6, to the second inputs of which the first and third inputs of the element are connected, respectively. The output signals from the elements OR 5 and 6 are fed to the control inputs of the majority element 4, the output of which is the output of the device.

The device works as follows.

In the normal operating mode, in which all the blocks are operational,

dinene to the inputs of the elements OR 5,6, to the second inputs of which are connected, respectively, the first and third inputs of the element. The outputs of the elements OR are fed to the control of the inputs of the majority element 4, the output of which is the output of the device. With two failed blocks, the device allows to set the output of the signal of the required type. 1 il.

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the control signals are faults equal to 1. Information signals are stored in the registers from whose outputs they go to the inputs of the majority element 4. The control signals go to the inputs of the majority element 7, at the output of which signal 1 is generated, and, accordingly, signals O are generated at the outputs of the OR circuit. The control code 00 at the input of the majority element 4 ensures its operation in the majority mode - selection of a signal by majority.

If one of the three blocks fails, the corresponding control signal is set to O and resets the register. If the jumper between R and IN is not set, its output is set to O, if the jumper is set, the output of the register is inverted and set to 1.

If the outputs of the two efficient blocks are the same, then the device works in the same way as described and generates a signal at the output equal to the output signals of the healthy blocks. If, as a result, the output signal of one of the operational blocks is incorrect, the device generates an output signal of the preferred state, equal to that set at the output of the inoperative channel register. Thus, unlike the known devices, which in a similar mode produce only a zero value of the output signal at the output, the proposed scheme allows to obtain at the output either O or 1 — that preferred value, which is less dangerous

for this particular control object, does not lead to emergency operation of the equipment. The value of the preferred output signal is set when using the device on a specific object by setting (or removing) jumpers between the R and IN inputs,

In the event of failure of any two blocks, the corresponding control signals go from 1 to O, and two 7 O appear at the input of the terminal 7 and its output is set to O "If the first block remains operational, 1 is generated at the output OR 1 and О - at the output of OR 2. The control code 10 switches the element from the majorization mode to the switching mode at the output of the signal at the first input, which remained operable. Similarly, if only the second (third) remained of the working of the three blocks, an AND (01) code is generated on the control input of the element and the output of the second (third) channel is connected to its output.

Editor V. Petrash Order 3111/45

Compiled by V. Maksimov

Tehred L. Serdyukova Proofreader M. Pojo

Circulation 672 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Invention Formula The device for the majority choice of signals, containing in each channel the first major element, whose information inputs are connected to the outputs of registers, and the output - to the actuators, the information inputs of the device are connected to the information D-inputs of registers, the control R-inputs of KO fopbix are connected to the inputs control device, elements OR, characterized in that, in order to repeat the noise immunity of the device by providing the set value of the output control signal during reserve failures these blocks, it contains the second major element, - the information inputs of which are connected to the corresponding control R-inputs of the registers, its output is connected to the first inputs of two WL elements, the other inputs of which are connected respectively to the first and third inputs of the second major element, and the outputs to additional control inputs of the first major element.