SU1243010A1 - Device for determining critical situation conditions - Google Patents

Abstract

The invention relates to the means of automatic control, monitoring and signaling of the state of aircraft and can be used to improve the efficiency and safety of their operation in: critical: situations that have several significant states. The device makes it possible to record the state of situations in which the transition from one state to another is determined by a set of signals from several sensors. For this, the device is provided with a second register, into which, according to the generator clock signals, the contents of one read cell of the memory block, containing groups of cells for each state of the situation, are written. Comparators., Comparing the output signals of the sensor unit and the register, control the operation of the switch, ensuring the change in the contents of the register, 1 slug. from 1 × 9 with

Description

The invention relates to the means of automatic control, KOHTpojjH and signaling the state of complex technical systems, in particular aircraft, and can be used to increase the efficiency and safety of their operation in critical situations that have several essential states.

The purpose of the invention is to increase the functional reliability of the device by extending it to situations in which the transition from one state to another is determined by a set of signals from several sensors,

The drawing shows a block diagram of a device for determining the state of a situation.

The device contains a block of 1 sensors, registers 2 and .3, a counter 4, a block 5 of memory, a multiplexer 6, a delay element 7, a generator 8, an element 9, a comparators 10 and 11, a switch 12 and a block 13 reset.

The device works as follows.

When the power is turned on, the block 13 zeroes the contents of the registers 2 and 3 of the counter 4. The clock pulse of the generator 8 ensures that the contents of the cell of the memory block 5 with the zero address are found in register 3. As a result, the inputs of the counter 4 and register 2 are set to adjacent to zero, and the output of multiplexer 6 is connected to a sensor defined by a code arriving at the inputs of the second group of multiplexer 6

When the signal at the output of multiplexer 6 coincides with the signal of the first output of the second register. 3, a single signal appears at the output of the first comparator 10, indicating the detection of a transition situation. If there is a single signal at the second output of the second register 3 (indicating a stopping adjacent state)., Then delayed: element 7 clock pulse through the element 9 comes to the first input of register 2 and provides an entry to the register 2 of the adjacent state code .- In addition, a delayed clock pulse through the switch 12 enters the first input of counter 4 and provides 4 codes for writing to the counter. adjacent state. This operation is also performed when a situation transition is not detected (zero at the output of the comparator 10J and, at the same time, the transition state is not stopping (zero at the second output of register 3). In those cases when the signals at the comparator 1O output and at the second output of register 3 do not coincide with each other, the delayed clock pulse through switch 12 enters the second input of counter 4. This increases by one the contents of. counter 4, considered as a number in binary code. When it enters from the generator B trace; impulse repeats the considered sequence of actions, but already dp new.

the state code recorded in counter e 4. Thus, on each clock cycle, the contents of the counter either increase by one (if the adjacent state is not stopping and, at the same time, a transition is detected or if the adjacent state is stopping, but the transition state has not been found. either

The pr: w-1 value of the code of the adjacent state is (in opposite cases of J. The writing of the code of the adjacent state to the first register 2 is performed only on those cycles in which the adjacent

This is a stopping state.

and, simultaneously, a transition is detected. The outputs of register 2 are informational outputs of the device, transmitting the code of the current state of the situation to external information-actuators. (indicators or drivers of control commands).

For proper operation of the device, it is necessary to program the memory cells of the block, 5 memory in a certain way. For each state of the situation, a group of memory cells is allocated, and the first group of the group has an address equal to the code of the corresponding state of the situation. The initial state (with a Zero code) corresponds to a cell with a zero address. The sequence of the cells in the group should correspond to the sequence of the situation change. Each cell contains a bit of a group of bits:

the first group is the bits containing the code of the adjacent state of the situation corresponding to the given cell; the second group - bits containing the sensor address over which the state transition of the situation is controlled; third group - a single bit indicating the value of the sensor signal during the transition of the situation state; fourth, a group is a single bit, indicating that the adjacent state: is stopping

In the final cell, each group of cells in the quality, the code of the adjacent state (the first group of bits,) contains the address of the first cell of the group; A cell should contain a zero sensor address in the second, a group of bits, a zero sign of transition in the third group of bits and a single sign of the adjacent stopping, which is - in the fourth group of bits. B) for this, when it enters an intermediate state corresponding to the terminating cell, a transition always occurs to the state corresponding to the first cell of the given group of cells.

With such an organization of memory in register 2 there is a status code of the situation, and in counter 4, there is a cyclic change of intermediate states, until for any of the groups of cells corresponding to this state of the situation, all sensors detect transition state At this moment, the status code of the situation in register 2 changes. Thus, when the state code changes, the signals of the sensor set are detected, and the set of sensors is determined by the current state of the situation. It is assumed that the period of the generator clock pulses is much less than the minimum time between the change of states of real critical situations.

43010-4.

Claims (1)

Claims. A device for determining the state of a critical situation, containing a sensor unit whose outputs are connected to the first group of inputs, multiplexer, a reset unit whose output is connected to the first input of the first register, whose outputs 10 are the device output group, the counter , memory block, generator, delay element, AND element, the output of which is connected to the second input. The primary register is an output 15 of the device that is different from one another. In order to increase the functional reliability of the device, two comparators are inserted into it, a switch and a second register, the first output 20 of which is connected to the first input of the first comparator, the output of which is connected to the first inputs of the And element and the second comparator, the output of which connected to the first input 5 of the switch, the first output of which is connected to the first input of the counter, the output group of which is connected to the input group of the memory unit, the output group of which is connected to the group 0 inputs of the second register, the second output of which is connected to the second inputs of the AI element of the second comparator, the generator output is connected to the input of the memory block, to the first input of the second register and through the delay element to the third input of the AND element and the second input of the switch, the second the output of which is connected to the second input of the counter, the output of the reset unit is connected to Q the third input of the counter and the second the input of the second register, the first group of outputs of which is connected to the group of inputs of the first register and the counter, the second group of outputs of the second register Pa connected to the second group of inputs of the multiplexer, the output of which is connected to the second input of the first comparator. Compiled by E.Olenin Redak: torus S.Lyzhov Tehred M «Hodanicorrector G, Reshetnik ..i .... Order 3710/51 Circulation 515, Subsidiary VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow., Zh-35. Raushska nab., D.4 / 5 Production and printing site ,, Uzhgorod, st. Project 4 .J: