SU706819A1 - Position control device - Google Patents

Description

one

The invention relates to the field of automatic control, in particular, to positional control devices.

Positional control devices are known that can be used in high-frequency two-position automatic control systems comprising two pulse generators, a logic unit, two amplifiers, an executive element, a regulator, and a feedback sensor 1.

The disadvantage of these devices is that they require a large amount of equipment (two pulse generators, two amplifiers), as well as a complex sensor for the entire range of motion.

Positional control devices containing sensors are also known — to the outputs through the first commutator connected. To the control signal generator, the output of which is connected through the second comparator. with appropriate actuators G2, Z.

Of the known devices, according to the tachnic essence, the positional

a regulating device containing the first and second sensors, the outputs of which through the corresponding switches are connected to the inputs of the control signal generator, the output connected via an amplifier to the actuator 4.

The purpose of the invention is to improve the accuracy of the device,

The goal is achieved by the fact that serially connected pulse generator and logic unit are installed in the device, the outputs of which are connected to the second

COOT keys are disabled.

The block diagram of the device is shown in FIG. 1; The output characteristics of the sensors, taking into account their relative position on the object of regulation, is shown in FIG. 2

The device contains a generator of 1 pulses, a logical block 2, the first 3 and second 4 keys, the first 5 and second 6 sensors, driver 7

control signal, amplifier 8, actuator, 9, control object 10.

FIG. 2 the following notation is accepted: H - vykhrdna coordinate,

such as angle; U ,, is the output signal of the sensors — P2 — the first and second positions to which the object must be moved is regulated: Ne.

The positioning device operates in the mode of transferring from one position to another. The sensors of the device are mounted on the object; those adjustments are mounted so that the zero sensor 5 corresponds, for example, to the first position of the object to be regulated, and the zero of the sensor to the second position of the object to be controlled.

From the pulse generator 1 to the logic unit 2, command pulses are received with a frequency determining the jog frequency. Logic block 2; during one period of the following command pulses; Lautes the signal to the control input of the key 3 installed in the output circuit of the amp amp 5;

When a device is turned on, one of the sensors is working on the signal of this sensor, setting the object to be controlled to one of these positions, corresponding to zero of this sensor.

In the proposed device eliminated the need to form and transmit a setting effect, proportional to a given position of the object of regulation; The BWedTO of the driver action on the device receives a sequence of command pulses whose parameters do not affect the accuracy. Thus, in the total error of the device, there is no power due to the misalignment of the transmissions and the transmission of the driving force.

Another advantage of this device is that the device sets the object of regulation to both given positions at the zero point, when you get from the sensor. Term linearity and accuracy are required in the area of zero, which significantly simplifies the instrumental implementation of the sensor. As an example in phi, g. 2 dotted line shows one of the possible options for the output characteristics of the sensor.

invention formula

A control device containing the first and second sensors, and the outputs of which are connected to the inputs of the control signaling device through the respective keys, the output connected through an amplifier to the actuator, ..-;.;. characterized in that, in order to increase the accuracy of the device, there are installed in series a pulse generator and a logic unit, which are connected to the second inputs of the corresponding keys.

Information sources, ; taken into account in the examination

1. USSR author's certificate

No. 408271, cl. G 05 B 11/78, 1971,

2. Anisimov I.V., Fundamentals of Automation of Technological Processes, of the Petrochemical and Oil Refining Industry, L., Khimi, 1967, p. 359-363.

3. KRUG E.K. and others; Digital controllers. M.-L., Energy 1966,

with. 425-428.

4, Modern Methods for Designing Autotonic Control Systems. Ed. B.I. Petrova, M., Mechanical Engineering, 1967, p. 330-333.

JO