SU706821A1 - Dc follow-up system - Google Patents

Description

This invention relates to systems for the automatic control of direct current electric motors and megapixels. It can not be used to correct servo systems, servo drives, etc. /

Automatic control systems are known / containing adaptive regulators as a corrective device with a variable structure 1. Their disadvantage is low speed.

The closest to the proposed invention of the existing systems is the system, with a two-channel correction filter 2, containing a series-connected comparator, a first adder, a first filter, a first amplifier and a rectifier, a wave and a series-connected second filter, a second amplifier, a relay, a multiplier , a pulse-phase control unit, a thyristor converter, a motor, and a speed sensor, the output of which is connected to the intruder input of the first adder. The engine output is connected via a position sensor to the second input of the comparator, the inputs of the first and second filters are combined.

The disadvantage of such systems is limited speed, and an increase in the gain in order to achieve a higher speed results in a self-oscillating mode in the system.

The purpose of the invention is to increase speed while

0 maintaining high accuracy and stability of the system.

The goal is achieved by the fact that the system is equipped with a constant voltage source and additional serially connected first signal limiter, functional converter, second signal limiter and second adder. The output of the rectifier is connected to the input of the first signal limiter, the output of the second adder is connected to the second input of the multiplication unit, and the output of the constant voltage source is connected to the second 5 input of the second adder.

The drawing shows a block diagram of a tracking system.

Claims (2)

The mismatch is detected by a comparator 1, the output of which is connected to the 0 by the first adder 2, at which a comparison between the mismatch and the signal of the speed sensor 3 is given. The output signal of the first adder 2Stakes the de-analogue device, in one channel of which the series-connected first filter 4, first amplifier 5, rectifier 6, first limiter (bottom) 7, functional-distant converter 8, forming in our case parabolic dependence between the input and the output, the second limiter (above) 9, the second adder 10 and the multiplication unit 11. An adjustable constant voltage is applied to the second input of the second adder 10 ps5 from a constant voltage source 12. The second channel of the correction device consists of the second filter 13, the second amplifier 14 and the three POSITIVE relay element - relay 15, the output of which is connected to the second input of the multiplication unit 11. The output signal from the multiplication unit 11 is supplied to the pulse-phase control unit 16 and then to the series-connected thyristor converter 17, the motor 18, the output of which is connected to the speed sensor 3 and the position sensor 19; ; ..., The scheme works as follows. The position matching is compared on the adder 2 with the signal of the speed sensor 3 and is fed to a two-channel correction device. In the first channel, the filtering filtering, amplification, with a small gain factor and the formation of a parabolic characteristic with adjustable limiting from the top and bottom. Configuring this kenagla determines system performance. In the second channel, filtering, amplification with a large amplification factor and the formation of a three-point relay characteristic are performed. Tuning this channel determines the accuracy of the tracking system. Such a division of the functions of the two channels makes it possible to increase the speed of the system and to allow the mass system between accuracy and stability; When multiplying signals with rel iS and adder 10 forms, with sig. The control, which is an odd function, is mismatched and goes to the impulse-phase control system, which causes a proportional shift of the impedance of the thyristor converter 1. the rotation of which is transmitted to the position sensor 19 (feedback in position) and the speed sensor 3 (speed feedback). The proposed solution allows to increase the speed of the system while at the same time achieving high positioning accuracy. The present invention makes it possible to use the electric motor in the control system in the optimal mode with the highest efficiency by ensuring the start and braking in the following mode with maximum acceleration and deceleration. This increases the system performance by about 20-3.0% and, as a result, the performance of the mechanism. The optimum mode of operation of the electric motor increases its service life. These differences allow us to obtain not only a technical, but also an economic effect. The claims The following DC system, comprising a series-connected comparator, a first adder, a first filter, a first amplifier and a rectifier and a series-connected second filter, a second amplifier, a relay, a multiplier, a pulse-phase control unit, a thyristor converter, a motor, and The speed sensor, the output of which is connected to the second input of the first adder, the engine output is connected through the position sensor to the second input of the comparator, and the inputs of the first ИBTdporo filter are combined, which means So that, in order to increase the speed of the system, it contains a constant voltage source and in series, connected to the first limiter. signal converter, the second signal limiter and the second adder, the output of the rectifier is connected to the input of the first signal limiter, and the output of the second adder is connected to the second input of the multiplication unit, the output of the constant voltage source is connected to the second input of the totalizer. ora . ; Sources of information taken into account in the examination 1. The author's certificate of the USSR № 467327, cl. G 05 B 15/02, 1974. 2. Nonlinear correction devices in automatic control systems. Under, ed. Yu.I.Tolcheeva, M., Mechanical Engineering, 1971, p.15 (prototype).