SU1149264A1 - Adaptive redundant device - Google Patents

Abstract

1. ADAPTIVE RESERVED DEVICE containing redundant blocks, control and indication blocks, the first inputs of which are connected to the output of the device, the second inputs - with the outputs of the corresponding redundant blocks, and the first outputs - with the corresponding input of the first element OR, characterized in that expanding the field of application of the device and increasing its noise immunity; it contains a second element OR binary reversible counter and a threshold element, while the second outputs of the control and display units are connected with the inputs of the threshold element with weights 1 third outputs with the corresponding inputs of the second element OR, the output of which is connected to the subtractive input of a binary reversible counter, the summing input of which is connected to the output of the element OR, the outputs of the binary reversible counter connected to the inputs with weight Wj 2 of the threshold element, the output of which is connected to the output of the device. 2. The device according to claim 1, of which is that each monitoring and display unit contains a NOT element, a delay element, two differentiating elements, an i element I, a trigger, an indication element and a TL element UNIMQUALITY, the first input of which is connected to the first input of the block, the second input through the delay element - with the second input of the block and with the first input of the element I, the output - with the input of the first differentiating element and through the element NOT with the input of the second differentiating element, the output of which is connected to the zero input of the trigger and the third the output of the block, the output of the first differential element is connected to the first output of the block and to the single trigger input, the single output of which is connected to the display element, and its zero output is connected to the second output of the And element, the output of which is connected to the second output of the block.

Description

The invention relates to automation and computing and can be used in redundant control systems, as well as in adaptive redundant devices. A three-channel redundant major choice device is known that contains elements of a match associated with the output of the device through the elements of the assembly l. A redundant device is known, which contains failure indicators of the majority element, OR schemes, which allow, regardless of the nature of the failures, to remain operable with a probability of 0.5 after the failure of two redundant blocks in a three-channel system 2. The disadvantage of these devices is with limited capabilities, due to

The fact that the devices do not detect failures and failures that have occurred.

The closest in technical essence is an adaptive redundant device containing adaptation blocks, redundant blocks, restoring trigger organ, an NL element, comparison elements that maintain operability up to (N-2) failed blocks (N is the number of redundant blocks) 3J.

A disadvantage of the known device is the limited functionality due to the fact that the device does not have the resolution to detect failures and malfunctions of the failed channel and in case of failures does not automatically activate this channel after the restoration of its operating capacity.

The aim of the invention is to expand the functionality of the device and increase its noise immunity.

The delivered circuit is achieved by the fact that the device containing redundant blocks, monitoring and display blocks, the first inputs of which are connected to the output of the device, the second inputs - to the outputs of the corresponding redundant blocks, and the first outputs - to the corresponding input of the first SHS element, additionally contains the second OR element, binary reversible counter and threshold element, while the second outputs of the control and display units are connected to

with the second input of the block and with the first input of the element I, the output to the input of the first differentiating element and through the element NOT to the input of the second differentiating element, the output of which is connected to the zero input of the trigger and to the third output of the block, the output of the first differentiating element to the first output unit and with a single trigger input, the unit output of which is connected to the display element, and its zero output - with the second output of the element I, the output of which is connected to the second output of the block.

The drawing shows a block diagram of the device.

The device consists of redundant blocks 1, blocks 2 Control and idikatsii, elements SHSh 3 and 4, binary reversible counter 5, the threshold element 6 and output 7.

Each block 2 consists of the UNEQUALITY element 8, the element NOT 9, the delay element 10, the element 11, the differentiation of their elements 12 and 13, the trigger 14 and the element 15 of the display.

Counter 5 is an operational element that provides the storage of a word of information and the execution of an account micro-operation on it. The microcount operation consists in changing the meaning of a word (state). Impulses psgstayuschie to the first input of the counter, summed with the contents of the counter (summing input), 4 inputs of the threshold element with weights 1, the third outputs with the corresponding inputs of the second element OR, the output of which is connected to the subtractive input of a binary reversible counter, the summing input of which is connected to the output of the element OR, the outputs of the binary reversible counter are connected to the inputs with a weight Wj 2 of the threshold element, the output of which is connected to the output of the device. In addition, each monitoring and display unit contains a NOT element, a delay element, two differentiating elements, an AND element, a trigger, an indication element, and a UNEQUALITY element, the first input of which is connected to the first input of the block, the second input through the delay element and the pulses arriving at the second input, subtracted (subtracting input). Counter 5 can be executed according to any known scheme, Nr about 2 i- where N is the number of reserved blocks; Oa is the closest to a greater integer number. The output word is formed by the high-end (2-1) bit outputs of counter 5. The low-bit value of the binary reversible counter 5 in the operation of the device is not output and the output of the low-level trigger 14 is not connected to the input 6. The remaining outputs of counter 5 are connected to the corresponding inputs of element 6, and the i-th output of counter 5 is connected to the input of element 6 with weight W (numbering of conclusions in order to increase the weight of the discharge) Element 6 has N inputs with weights 1 connected to the corresponding third the outputs of blocks 2 and (2-1), the input with weights, 2, 2, connected to the corresponding outputs of the counter 5. The element threshold is determined, N + 1 by the formula T For the majority schemes N is odd The device works as follows. When working correctly, the signals from the outputs of blocks 1 are fed to the second inputs of blocks 2. In the initial state, trigger 14 is in state O, at its zero output signal 1 and element 11 is open for passing through the signal from the second block of block 2. At the first input block 2 receives a signal from the output of element 6. When blocks 1 are working correctly, the signals at the output of the element UNEQUAL VALUE 8 are equal to each other, at its output the signal is equal to O, trigger 14 is in the state O, element 11 is open, element 15 shows the state trigger 14. In case of violation of the correct The signals of one of the first and second inputs of block 2 are not equal to the output of block 1, and the signal at output of the UNEQUALITY 8 element appears. Element 12 generates a pulse corresponding to the leading edge of the signal at the output of the HEPABHQ3HA4 element 8, this pulse arrives then through the element OR 3 to the summing input of the counter 5, where the number of failures is counted, and to the single input of the trigger 14, which is transferred to state 1 at its zero output signal O, the element 11 also closes to pass the signal from the second input of unit 2. Elem NT 10 is designed to - delay the signal arriving at the input of the UNEQUALITY element 8 from the second input of block 12 for a time equal to the delay of the signal in the element 11 and element 6. This is necessary to prevent racing in the circuit. the UNCHARTERNESS element 8 becomes O, the output of the element is NOT 9 - 1, and the element 13 outputs a pulse through the element OR 4 to the subtractive input of the counter 5 and to the zero input of the trigger 14. The trigger 14 is transferred to the state O and the element 11 11 opens for passing the signal from the second input of block 2, i.e. the circuit restores the operation of the block. Elements 12 and 13 react to the O and 1 transitions and, therefore, produce two pulses that correspond to the leading and trailing edges of the input signal (positive and negative polarities, respectively). However, a positive pulse is operational, so a negative pulse does not change the state of trigger 14 and binary reversing counter 5. From block 2, the signals arrive at the inputs of the cement 6, the signals at the outputs of counter 5 are zero. Suppose the t-and the reserved block 1 have failed. The corresponding block 2 will close the signal path from the faulty block 1 to the input element. 6 and will send a signal to the element OR 3, to the counter 5. The value of the signals at its outputs is zero. At each subsequent failure, the corresponding blocks 2 will disconnect the faulty block 1 and sprinkle the signal through the element OR 3 on the summing input of the binary reversing counter 5, which will read the number of failures and insert the corresponding code to the inputs of the element 6. unit upon receipt of an even (in a row) pulse. For example, if the number of failures is 2, the binary code is O ... 0.01, 3 - 0 ... 001, 4 - 0 ... 010, and so on. In accordance with the values of the signals at the outputs of the counter 5, the threshold of the triggering element 6 will also change. If the unit 1 recovers (as a result of its replacement or because of a failure), the corresponding unit 2 will turn it on and send the signal through the element OR 4 to the subtracting input of the counter 5, which will reduce the binary code stored in it by one and accordingly increase the trigger threshold of the element 6. Thus, the circuit design analysis of the proposed device shows that control and indication blocks, as well as the introduction of a binary reversible counter, a threshold element and a second element OR, allows to expand the device application area, detect both failures and failures, increase labor productivity by reducing the activation time of redundant blocks after restoring, ensure noise immunity, increase reliability of information, reliability, which leads to improved technical characteristics.

Claims (2)

1. ADAPTIVE RESERVED DEVICE containing redundant blocks, control and indication blocks, the first inputs of which are connected to the output of the device, the second inputs - with the outputs of the corresponding redundant blocks, and the first outputs - with the corresponding input of the first OR element, characterized in that, for the purpose expanding the scope of the device and increasing its noise immunity, it contains a second element OR a binary reversible counter and a threshold element, while the second outputs of the control and indication units are connected to the input threshold element ¹ with weights ”1 third outputs - with corresponding inputs of the second OR element, the output of which is connected to the subtracting input of the binary reverse counter, the summing input of which is connected to the output of the OR element, the outputs of the binary reverse counter are connected to inputs with the weight W« = 2 * ' ⁴ threshold element, the output of which is connected to the output of the device. 2. The device according to claim 1, characterized in that each control and indication unit contains an element NOT, a delay element, two differentiating elements, an element AND, a trigger, an indication element and an DISPERSIBILITY element, the first input of which is connected to the first input of the block, the second input through the delay element - with the second input of the block 'and with the first input of the element And, the output is with the input of the first differentiating element and through the element NOT - with the input of the second differentiating element, the output of which is connected to the zero input of the trigger and the third output of the block, the output of the first differentiating element is connected to the first output of the block and to the unit trigger input, whose single output is connected to the indication element, and its zero output is connected to the second output of the And element, the output of which is connected to the second output of the block.