SU1104467A1 - Adaptive control device - Google Patents

Abstract

1. A DEVICE FOR ADAPTIVE CONTROL, containing in each canape a parameter generator, the control inputs of which are connected to the first and second outputs of the action unit, and the output is connected to the input of the latter, characterized in that, in order to increase the reliability of the device, an adder is entered into it control, code-analog converter, summing element, inequality element and timer, and each channel additionally includes a valve, the first input of which is connected to the output of the clamper, the second input - to the channel input, output - with the first output of the channel, the second output of which is connected to the output of the setting device, while the first outputs of the channels are connected to the combined channel inputs of the summing element, and the second outputs - to the corresponding channel inputs of the adder, the output of which is connected to the information input of the code-analogue converter, the first and the second control outputs of which are connected to the corresponding control inputs of the summing element, the first and second control outputs of the latter are connected respectively to the inputs of the element This inequality, and the working output is connected to the load, in addition, the output of the inequality element is connected to the combined inputs of the channels and is connected via a timer to the input Reset of the converter-code converter and to the Inhibit adder input. 2. The device according to claim 1, wherein the summing element contains the first and second with a smaller magnetizing force actuation of the reed switches and common control windings, while the starting of the first and second windings are connected to the first and second control inputs of the summing element respectively, and their ends are connected to the beginning of the third winding, which is connected to the combined channel input of the summing element, and the end of the third winding is connected to the movable KoHtaKTy of the first reed switch, the stationary rotating contact of which dinene with a movable contact of the second reed switch, and a stationary closing contact with the first control output of the summing-1 of the SCHERO element and through the first resistor, 4 with a common bus, the fixed break contact of the second reed switch is connected to the second control output of the summing element and through the second resistor to common tire, and a fixed locking contact - to the working output of the summing element.

Description

The invention relates to an automatic control technique and can be used in the construction of highly reliable multichannel systems. A device for automatic control of complex installations is known, in which monitoring and analysis of various physical parameters is carried out using sensors that transmit a signal for automatic processing. The processing result for each parameter is compared with the predetermined tolerances and the alarm conditions l are determined. The disadvantage of this device is low reliability due to the independent control over the parameter of each of the sensors and the lack of adaptation to changes in the monitored parameters. The closest to the invention of the technical essence and the achieved result is a closed control system containing in each channel a parameter master, the control inputs of which are connected to the first and second outputs of the influence unit, and the output connected to the input of the latest 2J, a disadvantage of the known system low reliability is caused by the need to form a large number of auxiliary signals and independent control by the Parameter of each channel. In addition, to control by several inherent parameters, the system is organized by simply building up and at the same time the parameters are regulated as well as independent, which leads to a decrease in its adaptive qualities. The purpose of the invention is to increase the reliability of the device. The goal is achieved by the fact that the device for adaptive control, containing in each channel the parameter master, the control inputs of which are connected to the first and second outputs of the block and the output is connected to the last input, is added to the control signal adder, code-analog converter, summing element, no equivalence element and a timer, and each channel additionally includes a bentil, the first input of which is connected to the master output, the second input is connected to the channel input, and the top input is connected to the first output of the channel, watts The output of which is connected to the output of the sensor, while the first outputs of the channels are connected to the combined channel inputs of the summing element, and the second outputs to the corresponding channel inputs of the adder, the output of which is connected to the information input of the code-analog generator, the first and second control outputs of which connected to the corresponding control inputs of the summing element, the first and second control outputs of the latter are connected respectively to the inputs of the inequality element, and the working output is soy Inonii with load furthermore nonequivalence element output is connected to the combined input channel and a timer associated with the input reset code-to-analog converter and the adder to the input prohibition. In addition, the summing element contains the first and second actuators with a smaller magnetizing force and the common control windings, with the beginning of the first and second windings connected to the first and second control inputs of the summing element, respectively, and their ends connected to the beginning of the third winding, which is connected with the combined channel input of the summing element, and the end of the third winding is connected to the movable contact of the first reed switch, the fixed disconnecting contact of which is connected to the movable contact of the second the fixed end of the reed switch and the fixed end contact with the first control output of the summing element and through the first resistor with a common bus, the fixed disconnecting contact of the second reed switch is connected to the second control output of the summing element and through the second resistor to the common bus, and the fixed closing contact is connected to the working output of the Summing element. FIG. 1 shows a block diagram of the device for adaptive control; in fig. 2 - time diagram of the device. The device for adaptive control contains channels 1.1,1.2, ... lm, adder 2 control signals, converter 3 code analog, summing element 4, unequality element 5, timer b and load 7. Each channel consists of parameter setting unit 8, block 9 and the valve 10. The control inputs 11 of the setting device 8 are connected to the first and second outputs of the block 9, and the output 12 is connected to the input of the last and to the first input of the valve 10, the second input of which is connected to the input 13 of the channel. The output of the valve 10 is connected to the first output 14 of the channel, the second output of which is connected to the output 12 of the dial 8. The inputs 13 of the channels 1.1, 1.2, ..., l.m are combined. The first outputs of the 14 channels are connected to the combined channel inputs of the summing element 4, and the second outputs 12 to the corresponding channel inputs of the adder 2. The code-analog converter 3 includes front driver 15 and converters 16.1 and 16.2, each of which is designed as a reversible counter 17 and resistive healer Ri, R2, ...,. The first output of the counter 17 is connected via a resistor R1 with the second output, the second output is through a resistor R2. with the third output, ..., the m-th output is connected via a resistor to the control output 18.1 (18.2 transducer 3 codtangshog. Counting inputs 19.1 and 19.2 counters 17 are connected to the forward and inverse outputs of the forcing device 15, input which is connected to the information input 20 of the converter 3. code-analogue, and the Reset inputs are combined and connected to the input 21 of the converter 3 code-analogue. The output of the adder 2 is connected to the information input 20 of the code-sensor converter 3. The summing element 4 contains the first 22 and second 23 with less magnetizing force of actuation The control pins and control windings 24-26, the first and second windings 24 and 25, are connected to the control inputs of the summing element 4, which are respectively connected to the control outputs 18.1 and 18.2 of the code-analog converter 3. The ends of the windings 24 and 25 are connected to the third winding 26, the beginning of the third winding 26 is connected with the combined channel input 14 of the summing element 4, and the end is connected to the movable contact of the first reed switch 22, the fixed breakout contact of the latter is connected to the movable contact of the second reed switch 23, and the fixed circuit A contact with the first control output 27 of the summing element 4 and through the first resistor 28 with a common bus A fixed opening and the 1st contact of the second reed switch 23 are connected to the second control output 29 of the summing element 4 and through the second resistor 30 to a common bus, and the fixed 3aNaj the contact is connected to the working output 31 of the summing element 4 and connected to the load 7; Outputs 27 and 29 of the summing element 4 are connected to the inputs of the power supply 5 of unequalness, the output of which is connected to the combined inputs of 13 channels 1,1, 1.2,. ,,,, 1.t and in half 6 is coupled to reset input 21 of the code converter 3 analog and prohibition to the input 32 of the adder 2, setting unit 8 is designed for converting an original signal to the type and shape suitable for processing in the system. It converts the primary parameter to normalized, issued to the system, and processes the information on inputs 11, causing the required change in the primary parameter. Block 9, the action is designed to set adjustable reference signal limits and issue an error signal to the generator 8 equal to the difference of the reference and adjustable signals. The adder 2 of the adjustment signals is intended for the algebraic summation of the adjustable signals. The code-analog converter 3 is designed to quantize signals from adder 2, generate pulses on the transition of the signal of adder 2 of each quantization level, count the number of these pulses, and form a voltage proportional to this number separately for positive and negative signals of adder 2, Summing element 4 is designed to summation of the regulated Kanshov signals and, depending on the results of the summation, the output of the adder signal to the load 7 or the control signal to change the press work system. By load 7 is meant any receiver of the total (complex) parameter in the m channel system. The DEVICE contains reference signal source sources and a reference signal source (not shown). The reference signal source has three outputs: + output, - output, common bus. Blocks 9 are powered from the source of the reference signal, code-encoder converter 3, the converter 16.1 turning on the output and common, and 16.2 between the output and the common bus. In Fig. 2a, adjustable signals 1.2 and are shown. t channels Cp, Cpj and Cp, respectively. For convenience, the same graph shows the reference signals 1 Sol ,, 4 CoOj / Conn ,, and conditionally they are taken to be the same for each channel. The dotted line shows a signal equal to the algebraic sum of Cp,, Cf.2,,,, Cp, t .. Fig, 26, Vig shows the error signals of Soy,, Couj and Sosh, 1, 2 and m channels, obtained as the difference of the controlled and of the reference signal in each channel and output for influencing the values of Cp, Cp and Cpc of the control signals until the latter coincides with the corresponding values of the reference signals Con ,, Sop, Sop,, Fig. 2e shows an algebraically summed and quantized level adjustable signal . Conventionally, four identical quantization levels are shown for both positive and negative values of the total control signal.

FIG. 2e shows the number of transitions of the total regulated signal through the quantization levels, and in FIG. 2g a selection signal proportional to this number,

FIG. 2c shows the total regulated signal, its antiphase selection signal and the total sum of the signal (dashed line) transmitted to the load.

The device operates as follows 10

at once.

In the setting units of the 8 channels 1,1, 1,2,. ,, 1, t, the primary signal is normalized to the form and form received for operation in the system, and the c-outputs 12 as a control-15 signal Cp,, Cpj,. ,, SRG (Fig. 2a) is fed to the input of the action units 9 and simultaneously to the first input of the valves 10 and to the channel inputs of the adders 2 of the control signals. 20 In block 9 of the action, an adjustable reference signal is formed for the positive and negative values of the adjustable signal 1 Sop, -, t Sop,.,, 1 Sopu (Fig. 2a). Adjustable signal 25 in block 9 is compared with the reference signal of the same sign, and in case of an adjustable signal being exceeded by reference block 9, the action signal produces an error signal CQUI, (Fig. 26), CoLjg (Fig. 2c),. . ,, Couirn FIG. 2d), which is fed to the inputs 11 of the setpoint adjusters 8, causing a change in the rtep of the wave signal until the corresponding adjustable signal reaches the value / at which 55 the error signal is equal to O,

If the valves 10 are open / then the adjustable signals from the outputs 14 of channels 1.1, l, 2 ,,,, l, m are fed to 40 an integrated channel input of the summing element 4, If there is a locking signal from the output inputs of the 13 channels inequalities, the gates 10 are closed — 45 you and the adjustable signals do not arrive at the combined channel input of the summing element 4,

The control signals Cp, Cp, g Cp are algebraically summed up in the tg

adder 2 (Fig. 2a, d from, signal Cp) and the total signal is fed through information input 20 of converter 3 code-analogue to the input of front driver 15.

In the front-side shaper 15, the reference signal ± Sop is quantized to levels in the adjustable divider Con (separately for + Sop and -Co; 1) (Fig. 2e, levels 14 for + C (jn and -Con) and then the total signal Cp is compared with these 60 ni quantizing level. If the total signal exceeds the quantization level, a positive pulse is generated, and if it becomes less than the level, then the negative pulse (FIG. 2e), 65

From the direct and inverse outputs of the imaging unit 15, these pulses arrive at the counting inputs 19.1 and 19.2 of the reversing counters 17 of the converters 16.1 and 16.2, respectively. Each counter 17 is loaded onto a resistive divider Ri, R2 ,,., Rm. When a positive impulse arrives at the counting input, one is added to the number written into the counter, and when the negative impulse arrives, the unit is subtracted. On the divider R1, R2,..., / Rrvi, a C 8X6 signal is formed proportional to the number recorded in the counter. The signal SVV (Fig. 2g) from the control outputs 18.1 and 18.2 of the converter 3 code-analog is supplied to the first and second control inputs of summing element 4 and summed algebraically with the signal at the combined channel inputs of the summing element 4, as a result of this total The signal Sc (Fig. 2h) is within the tolerance and in this case is supplied to the operating output 31 of the summing element 4 and further to the load 7. If the total sum signal is not within the tolerance, then on the first 27 or second 29 control outputs summing element At point 4, a signal is generated that triggers the output of the unequal element 5. The latter is fed to the input of timer 6 and to the combined channel inputs of 13 channels.

1.1.1.2, .., 1.ha and locks the valves 10, closing the access of the control signals Cp,, Cp2,. , , Срт to the combined channel input of the summing element 4. If the duration of the sigal at the output of the element 5 is unequal for a large fixed time, on the timer of timer 6 a signal is generated that is fed to the input 32 Inhibiting the adder 2, closing the access of the total signal

to the converters 3 code-aalog, and to the input 21 Reset counters 17, threw them. At the same time, load 7 is disconnected from cHCTeNtj, and channels 1.1,

1.2 ,,,., 1, t-from the rest of the system. This state is maintained until then. Until the restoration of the regulation “of their signals Cpi Wed 2, ..., Cpc in kayals 1.1, 1.2 ,,., 1, t. At the same time, the signal from the combined channel inputs 13 will be removed, the prohibition on - the input 32 of the adder 2 will be removed, the valves 10 will open

and the total total signal will again arrive at load 7.

The total control action of the windings 24-26 of the summing element 4 implements the function

 + I I, Wj const.

where

F f

cpai

Srgz

respectively, the overall magnigde F is a driving force (m “d.s.), created by the windings 2426

ppm triggered gerk with -yy on 22}

ppm hitch 23;

Il4

current in the corresponding hanks

W24, W25

W26 is the number of turns in the windings.

For example, the system is running normal but (in the + Cp area). Then the total sum signal is supplied to the load by the circuit I, the combined channel input of the summing element 4, the beginning of the winding 26, the winding 26, the moving contact of the reed switch 22, the moving contact of the reed switch 23, are stationary, and the closing contact of the reed switch 23 / working output 31 of the summing element 4. If normal operation, the signal Cp is in the negative region, then the load current flows through the circuit: load operating output 31, aKtJK contact of the reed switch 23, movable contact of the reed switch 23, opener, movable contacts of the reed switch 22, winding 26, combined channel ny input member 4.

Suppose that during normal operation, the signal Cp (Fig. 2d) is within the tolerance and varies from point O to current in (Fig. 2d). With this change, the Cp signal passes through the 1st and then the 2nd quantization levels. Two pulses are received from the front-side driver 15 to the input 19.2 of the counter 17 of the converter 16.2, and the number 17 is written to the counter two in the binary code. On the Divider R, R2, ..., R3 converter 16.2, a voltage is formed, proportional to the number two. This voltage creates a current in the winding 24 sA and the monitoring element 4, which flows along the circuit: converter divider .2, winding 25, winding 26, moving contact of the reed switch 22, fixed disconnecting contact of the reed switch 22, moving contact of the reed switch 23, fixed closing contact of the reed switch 23 , operating output 31 of summing element 4, load 7. Simultaneously, according to load 7, current flows from the setpoint adjusters 8 along the circuit: load 7, working output 31 of summing element 4, fixed closing contact of reed switch 23, movable

contact reed switch 23, fixed opening contact reed switch 22, movable contact reed switch 22, winding 26, outputs 14 channels 1.1, 1.2 ,, .., lm, minus pole of power sources (not shown) setters 8. Total current in the load is equal to the difference of currents from the voltage of the divider 16.2 and the voltage of the setting devices 8. As far as the current from the setting devices 8 is reduced, as much as it increased from the separator 16.2, i.e. the current through the load is practically unchanged (Fig. 2h, part of the RH).

Similarly, regulation and adaptation occur in the case of an increase in the signal Cp in the positive zone + Sop (Fig. 2d and g) with the only difference that the converter 16.1 is powered from the negative potential and, therefore, is removed from its divider negative with respect to the common bus voltage.

Let the system go out of the norm, for example, the general adjustable parameter Cp crossed point A (Fig. 2d and h) and exceeded the limit level + Sop. In this case, a voltage is generated at the output of divider 16.1, which creates such a current in the winding 24 that the total total magnetic field of the windings 24 and 26 will trigger the reed switch 22 and disconnect the load from the total total signal, and at the same time the signal at the output of the unevenness element 5, served on the combined inputs 13 kanshov. and in them on the valves 10, lock the last. If the time tg ti (Fig. 2a) of passing points A and A is longer than the specified time, the signals at the output of timer 6 (Reset and Disable signals) appear, disconnecting the system from the channels of adjustable parameters 1.1, 1.2, ..., lm of load 7 The same thing happens when -C is exceeded (point D in Fig. 2g and h) with the only difference that the voltage is removed from J separator 16.2 into coil 25 of summing element 4.

The present invention, in comparison with the known, allows to increase the Scalability of adaptive control in multi-channel systems, and the effect increases with an increase in the number of channels.

Reliability arises due to the mutual compensation of changes in signal channels in different channels and due to antiphase summation of the common control signal and a signal proportional to the change in the total control signal.

tvJ

Claims (2)

1. DEVICE FOR ADAPTIVE CONTROL, containing in each channel a parameter setter, the control inputs of which are connected to the first and second outputs of the exposure unit, and the output is connected to the input of the latter, characterized in that, in order to increase the reliability of the device, an adder is introduced into it control signals, a code-to-analog converter, a summing element, an ambiguity element and a timer, and a valve is additionally included in each channel, the first input of which is connected to the setpoint output, the second input is connected to the channel input, and the output - with the first output of the channel, the second output of which is connected to the output of the master, while the first outputs of the channels are connected to the combined channel inputs of the summing element, and the second outputs are connected to the corresponding channel inputs of the adder, the output of which is connected to the information input of the code-to-analog converter, the first and the second control outputs of which are connected to the corresponding control inputs of the summing element, the first and second control outputs of the latter are connected respectively to the inputs of the element NOSTA, and the working output is connected to the load, in addition, nonequivalence element output is connected to the combined input channel and a timer connected to the input ¹ 'Reset ^1' analogue code converter and to the input ¹ 'Disable''of the adder. 2. The device according to claim 1, wherein the summing element comprises a first and second reed with a lower magnetizing force and common control windings, while the beginnings of the first and second windings are connected to the first and second control inputs of the summing element respectively, and their ends are connected to the start winding tey tre that is associated with a union of obe-channel input summiruyu- ^a conducting element and the end of the third winding is connected to the movable contact of the first reed switch, a fixed razg "repentieth contact with which is connected with the movable contact of the second reed switch with H, and the fixed NO contact with the first control output sums 1 element and through the first resistor, with a common bus, the fixed NO contact of the second reed switch is connected to the second control output of the summing element and through the second resistor to the common bus, and fixed locking contact - to the working output of the summing element. l