SU911457A1 - Follow-up system - Google Patents

Description

(5) FOLLOWING SYSTEM

I

The invention relates to automatic regulation and can be applied in the construction of tracking systems where good transient characteristics are required.

A known tracking system comprising a comparison element, the output of which is connected through a series-connected adder and amplifier to an input element of the actuating element, the key and memory element flj connected in series.

The disadvantage of this system is that in the transitional mode of operation, the system has insufficient speed, which depends on the final value of the constant charge time of the storage element, and the high quality factor causes auto-oscillations.

The closest in technical essence to the present invention is a tracking system comprising a serially connected input signal sensor, a comparison unit, an amplifier, an adder, a drive and a feedback sensor, the output of which is connected to the second input of the comparison unit, and a serially connected three-position relay element and voltage divider, the output of which is connected to the second input of the C2 adder.

The disadvantage of the known system -

10 low quality regulation.

The purpose of the invention is to improve the quality of the transition process of the system.

To achieve this goal

15, the system contains the first element I, the first inverter and the second inverter connected in series, the second element K, the OR element and the key whose output is connected to the input of a three-position relay element, and the second input to the output of the comparison unit, through the first element I to the second input element OR and through

39

The first inverter is with the second input of the second element AND, and the input of the comparison unit is connected to the second inputs of the first element AND of the second inverter.

The drawing shows a structural electrical circuit of the tracking system.

The following system contains an input signal sensor 1 in series, a unit for comparing wuxi: a generator 3, an accumulator C, a drive 5 and a feedback sensor 6, the output of which is connected to another input of the block: ka 2 comparisons, a three-position relay element 7 with a hysteresis loop, the output of which through voltage divider 8 is connected to another input of adder A, key 9, element OR 10 two inverters 11 and 12, the first and second elements AND 13 and 1, whose outputs through the element OR 10 are connected to the control input of the key 9 "output which is connected to the entrance of the three positions Ion relay element 7, and the controlled input with the output of comparator unit 2, while the outputs of sensor 1 of the input signal and comparator unit 2 are connected to the inputs of the first element And 13 and through the inverters 1 1 and 1 2 to the inputs of the second element And 14.

The following system works as follows.

From the sensor 1 of the input signal, an external influence U is applied to the input of the tracking system.

Vl.,

Compares the input action U.gx, with the signal (. Of the feedback sensor 6, the difference between these signals g (t) UQX. (T) - and gbiy. (T) is amplified by amplifier 3 and through the adder k, to another input from the three-position Relay element 7 under certain conditions, through the voltage divider 8, a frequency response correction signal is applied, controls the drive 5.

 At small input voltages x, from the output of sensor 1 of the input signal, when g. (t) less dead band & the relays, the elements of And 13 and I do not work, since their own trip thresholds L p are chosen greater than (t) L relay. In this case, the key 9 passes the signal (t) to the input of the relay element 7. But this relay is in standby mode, since

.four

6 (t) L relay, the middle contact of the relay element 7 is in the neutral position, the correction signal is not fed to the input of the adder C, and the tracking system operates without the participation of the elements

When input signals UB). corresponding values, (t) D of relay element 7, is passed

correction signal frequency characteristics to the input of the adder k, eliminating auto-oscillations of the system. In this case, the thresholds of operation, ele .. T °. i.e. such that

 ol ,, where the amplitude of damped oscillations of the system when exposed to the compensation signal, and the elements And 13 and 1 do not work.

When input signals are Ugy, the corresponding pore values are col. . (t) 7 Stop and count. triggered one and

And 1 or D elements. With positive signals Ueo (.and (t), element And 13 triggers, with negative signals Ug), nf (t), because of the presence of inverters, element And 14 turns out. At the same time, element OR 10 switches and gives to the control input of the key 9 is a signal that switches the key to a position where the correction signal does not pass to the input of the adder 4. Such signal phasing (t) corresponds to the moments when the tracking system begins to work on the input signal. As the input signal is processed, the value (t) decreases as it reaches 6 (t) Unop. AND 13 (14) is turned off, does not give a signal to the input of the element OR 10, which removes the signal from the controlled input of the key 9, and the key 9 starts to give a signal (t) through the relay element 7 and the divider 8 to the input of the adder 4. When this €. (t) 7D relay element. As it approaches the steady-state value, & (t) tends to zero, and the relay element 7 goes into standby mode when its middle contact is in the neutral position and stops feeding the correction signal to the input of the adder 4. When the signals at the inputs of the And 13 elements ( 14) have different polarity, the elements And 14 and 13 do not participate in the work. The proposed system compares favorably with that

591

saves the transition process in a transient mode, without changing the system parameters in the steady state.

Claims (2)

1. USSR author's certificate №, cl. G 05 B 11/01, 1978. 2. USSR Author's Certificate No. 283355.C.S 05V 11/06, 1970 (prototype).