SU415639A1 - - Google Patents

Description

one

The invention relates to the field of automation, namely, to systems of extreme regulation.

An extremal controller is known that contains an analog-to-digital converter, the first input of which is connected to the output of the object of regulation, the second input to the first output of the generator, the third input of the analog-to-digital converter is connected to the input of the decoupling element, the output to the first input of the switch, the first and the second outputs of which are connected respectively to the first inputs of the first and second meters, the second inputs of which are connected to the output of the coupling element and to the second output of the generator; The first output of the second counter is connected to the first input of the code rewriting unit, the output of which is connected to the third input of the first counter, the output of which is connected to the reverse trigger trigger, the first output of which is connected to the second input of the switch and the first input of the first AND circuit, the second trigger output - from the third input of the switch and the first input of the second circuit the second inputs of both circuits "And connected to the second input of the census block code and to the third output of the generator; the outputs of the first and second circuits are connected respectively to the nerve and the second inputs of the additional element, the output

which is connected to the input of the object of control, and non-switch.

A disadvantage of the known extremal controllers is the 11-th accuracy of operation.

The purpose of the inventor is to eliminate this disadvantage.

This is achieved by using a device for forming a fictitious extremum in shchapovye extreme regulators, which contains an artificial extremum setting unit, the first input of which is connected to the first input of the switch, the second input through the switch connected to the second output of the second digital counter, and the output to the fourth input of the switch.

The drawing shows the structural scheme of the following: the first device for the formation of a fictitious extremum, where the i-object is the control; 2 - analog-digital converter; 3 - block of the task of an extreme extremum; 4 - delay element; 5 - the trigger; 6 - scheme 7 - non-switch; eight -

switch; 9, 0 - counters; II block rewriting code; 12 - sign trigger digital counter 9; 13 - reverse trigger; 14, 15 - schemes b - an executive element; 17- generator; 18 - uncoupling

element.

The device works as follows.

The signal from control object 1 is fed to analog-to-digital converter 2. From the output of the converter, pulses pass to the first input of switch 8 and to the first input of block 3 of the artificial extremum, from the output of which to the fourth input of switch 8, the number of pulses reduced . The factor "k can take on various discrete values set with switch 7. Trigger 5 of block 3 allows pulses to pass through an AND 6 circuit before a pulse arrives from one of the cells of counter 10. In this case trigger 5 is thrown and the next input pulse is not passes through the "AND 6" circuit. Through the delay time determined by the delay element 4, the trigger 5 returns to its initial state, etc. The pulses through the switch 8 are passed to the inputs of counters 9, 10. The first input of the switch 8 is connected to his first output, and the fourth input - with the second output, if the first output of the reverse trigger 13 is a single signal; the first input is connected to the second output, and the fourth input is connected to the first output, if there is a single signal at the second output of the flip-flop 13.

Let the first release of the trigger of the reverse 13 receives a single signal. The output of the counter 9 receives the total number of pulses in this measurement (coding), and the input of the counter 10 receives a reduced amount of k-Ni. In counter 9, the addition of the Ni code with the reverse k-Ni-i code of the previous coding is performed.

If Ni ik-Ni-i, then the trigger 13 remains as before. From the generator 17, a polling pulse is applied to the circuits And 14 and 15, which passes through the circuit And 14 to the actuating element 16. The control unit increases the control parameter by one step. At the same time, a pulse is applied to the block 11 of rewriting the k-Ni code from counter 10 to counter 9, and the rewriting is performed in the reverse code kNi. After the polling pulse, generator 17 from the second output sends a reset pulse to counter 10 and to sign trigger 12 of counter 9. This pulse does not pass to the input of trigger 13, since decoupling element 18 is turned on in the blocking direction. As a result, the device is prepared for a new cycle of operation. The cycle time of the generator 17 is selected depending on the inertia of the object 1.

If during the subsequent measurement the counter 9 overflows, then from the output of the sign trigger 12 a signal is sent to transfer the trigger of the reverse 13, to an extraordinary start of the converter 2 and to reset the counter 10 and the trigger 12. In this case, the first input of the switch 8 is connected to its second output, and the fourth entrance - with the first exit.

From converter 2, the same number of pulses as in the previous cycle arrives at the first input of switch 8, since commands to change the mode of operation of the object have not yet been received. After the end of the extraordinary coding of the input value by the converter 2 from the command generator

17, pulses arrive at the And block, the And 14 and 15 circuits, and the reset of the counter 10 and the trigger 12.

In the next cycle, the previous Ni + i code is compared with a reduced

the value of the subsequent code k-Ni + z- The subsequent reversal will be carried out in the case when Ni + m.kNi + rn i, which usually takes place at the second turn after the first reverse.

In the case of finding the maximum of the function, a slight rearrangement of the controller is required, for example, by replacing the linear converter 2 with an inversely proportional one.

Subject invention

Device to form a fictitious

extremum in schagovye extreme regulators, containing an analog-to-digital converter, the first input of which is connected to the output of the control object, the second input - to the first output of the generator, the third input

the analog-digital converter is connected to the input of the isolating element, and the output is connected to the first input of the switch, the first and second outputs of which are connected respectively to the first inputs of the first and

the second counters, the second inputs of which are connected to the output of the decoupling element and to the second output of the generator, the first output of the second counter is connected to the first input of the rewriter of the code, the output of which

connected to the third input of the first counter, the output of which is connected to the input of the reverse trigger, the first output of which is connected to the second input of the switch and the first input of the first “I” circuit, the second output of the trigger is

with the third input of the switch and the first input of the second circuit “And, the second inputs of the circuits“ And connected to the second input of the census block and the third output of the generator, the outputs of the first and second circuits “And connected respectively to the first and second inputs of the final element, the output of which is connected with the input of the control object, and a switch, characterized in that, in order to increase the operating accuracy, it contains a block for setting an artificial extremum, the first input of which is connected to the first input of the switch, the second input through yuchatel connected to the second output of the second digital counter, and an output - to

the fourth input of the switch