SU970318A1 - Extremal regulator - Google Patents

Description

The invention relates to automatic control systems and can be used in self-tuning radio engineering and radio metering systems, in particular, for tuning a band-pass filter with electronic frequency tuning.

An extremal regulator, a torus 1, containing a differentiated amplifier and an amplitude detector, a differentiator, a key and a control voltage generation unit, the output of which is connected to the input of the control object at the second key input, is connected to the output of the pulse generator, and the output of the control object is connected to the input amplifier with amplitude detector.

The disadvantage of this controller is a relatively low reliability. The setting is set to an extremum due to the presence of a mandatory setting error equal to 0.5-1.5 setting steps.

The closest in technical essence to the present invention is an extreme regulator 2, comprising a series-connected amplifier with an amplitude detector, a differentiator, a first key, and a control voltage shaping unit.

The output of which is connected to the first input of the adder, the second input of which through the second switch is connected to the output of the constant voltage transmitter, and the output is connected to the input of the control object, the output of which is connected to the input of the amplifier with an amplitude detector, and the output of the differentiator is connected to the second input 10 the house of the second prickly. This extreme regulator, in comparison with the above, has a high reliability, since it provides a higher accuracy of tuning to an extremum, which admits a tuning error of no more than 0.5 tuning step.

The disadvantage of the known regulator is the impossibility of changing

20 initial settings, ie the impossibility of auto-tuning. To change the settings, it is necessary to bring the controller back to its original position and carry out a new setting, which is often unacceptable for real objects. Therefore, the reliability of the adjustment to the extremum when adjusting an object with varying parameters for such 30 controllers is low.

The purpose of the invention is to increase the reliability of the controller.

The goal is achieved by the fact that the regulator, which contains the control voltage generation unit and the first key, are connected in series to an amplifier with an amplitude detector and differentiator, are connected in series to a pulse generator and the second switch, and the output of the control object is connected to the input of the amplifier with an amplitude detector, output control voltage shaping unit ;; inn with the input of the control object; additionally, the first and second valves, the first and second frequency dividers, The holders and the third key, the first and second outputs of which are connected respectively to the first and second inputs of the control voltage shaping unit, the output of the differentiator is connected to the first input of the third key and to the input of the first frequency divider through the first valve key, the second input of which is connected to the output of the first frequency divider, and the output of the first key is connected to the second input of the second key and through the delay unit to the third input of the first key, the second input of the third key connect n with the output of the second key, the third input of which via a second frequency divider connected to the output of the pulse generator.

.In FIG. Figure 1 shows the structural electrical circuit of the extreme controller; in fig. 2 - curve of dependence of voltage at the output of the amplifier with amplitude detector

Upj ,, y on voltage (at the control input of the control object.

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The regulator contains an object of regulation 1, an amplifier 2 with an amplitude detector, a differentiator 3,

control voltage generation unit 4, first and second valves 5 and 6, first and second frequency dividers 7 and 8, first, second and third keys 9, 10 and 11, delay unit 12, pulse generator 13. The voltage at the output of the control voltage formation unit 4 increases in steps when pulses are applied to its first input and decreases in steps when pulses are applied to its second input. The first valve 5 transmits negative pulses from the output of the differentiator, and the second valve 6 is positive. The first frequency divider 7 has a division factor of two, and the division factor of the second frequency divider 8 is selected from the condition K Tf, where T is the required periodicity of the auto-tuning mode; f is the frequency of the pulse generator 13

pulses. The delay unit 12 realizes the delay in the passage of a pulse for a time equal to the duration of the pulse from the output of differentiator 3. As the control object 1 we take a band-pass filter with electronic tuning in frequency.

Extreme controller works as follows.

In the initial position, the second key 10 is closed, the first key 9 is open, the third key 11 connects its second input with the first output. The voltage at the output of the control voltage shaping unit 4 is zero. When the pulse generator 13 is turned on, the pulses from its output through the second key 10 and the third key 11 are fed to the first input of the control voltage generation unit 4. The voltage at the control input of the control object 1 increases in steps to point c (Fig. 2). At the same time, the voltage at the output of the amplifier 2 with the amplitude detector increases to the value corresponding to the point from the extremal characteristic, and at the output of the differentiator 3 at each tuning step, positive pulses occur. In the next step (points d and d), a negative pulse is removed from the output of differentiator 3, which is fed through valve 5 to the first. the input of the third key 11, which switches its second input from the first to the second output. In the next two steps, the tuning returns to points c (c) and b (b). The output of the differentiator 3 occurs first positive, and then a negative pulse, which switches the third key 11 to its original position and closes the first key 9, arriving at its second input through the first frequency divider 7. In the next step, the setting goes to the point with (c). A positive pulse from the output of the differentiator 3 through the valve 6 and the first key 9 is supplied to the second input of the second key 10 and through the delay unit 12 to the third input of the first key 9. The second key 10 opens and the first key 9 turns off after a delay. point c (c).

Claims (2)

After time T, a pulse is output from the output of the second frequency divider 8 to the third input of the second key 10. The second key 10 closes and the auto-tuning cycle begins. The operation of the controller during the auto-tuning cycle does not differ from the operation during the initial setting, only the control voltage at the input of the control object is no longer changed from zero, but from the value set after the previous tuning or auto-tuning cycle. If the starting point on the extreme characteristic corresponds to the working point before the auto-tuning cycle, then the auto-tuning cycle will end in 4 steps, and the operating point will consistently occupy the position. If the starting point is point a, the auto-tuning cycle will end in 6 steps (b, d, c, bc). Thus, the proposed controller provides an extreme adjustment and periodic auto-tuning of the control object with a slowly varying position of the extremum relative to the control signal (for a band-pass filter such a pressure is possible with a changing frequently transmitted useful signal); (with a given periodicity, the deviation from the extreme settings due to changes in ambient conditions (deviation of the supply voltage, changes in the parameters of the controller due to changes in temperature, etc. .); provides tuning accuracy and self-tuning not less than 0.5 tuning step. Invention An extreme controller comprising a control voltage generating unit and a first key, a series-connected amplifier with an amplitude detector and a differentiator, a series-connected pulse generator and a second a switch, wherein the output of the control object is connected to the input of the amplifier with an amplitude detector, the output of the control voltage generating unit is connected to the input of the control object, characterized in that that, in order to increase reliability, it contains the first and second valves, the first and second frequency dividers, the delay unit and the third key, the first and second outputs of which are connected respectively to the first and second inputs of the voltage shaping unit, the output of the differentiator is connected through the first valve to the first input of the third key and the input of the first frequency divider, and through the second valve - with the first input of the first key, the second input of which is connected to the output of the first frequency divider, and the output of the first key is connected to the second input of the second of a key and through a delay unit - tretim.vhodom with the first key, the second input of the third switch is connected to the output of the second key, the third input of which via a second frequency divider connected to the output of the pulse generator. Sources of information taken into account during the examination 1. USSR author's certificate No. 631871, cl. G 05 13/02, 1977, 2. USSR author's certificate for application number 2902207 / 18-24, cl. G 05 13 / 02,1980 (prototype). FIG. one