SU758072A1 - Programme-control device - Google Patents

Description

The invention relates to the field of automation and computing and can be used in software systems control strength tests. five

A digital software device is known that contains a master oscillator, counters, logic elements, AND, OR, a switch, a code converter and a trigger £ 1]. The disadvantage of this device is its low reliability.

The closest to the technical essence of this invention is a device for software control, containing serially connected load sensor, scaling unit and registration unit, serially connected load setter 20, comparator unit, actuator control unit and synchronization unit, output which is connected to the input of the load master, the second input of the comparator is connected to the output of the load sensor, and one of the outputs is connected to the second input of the scaling unit [2]. A disadvantage of the known device is low accuracy. thirty

2

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

This goal is achieved by the fact that the device is connected in series with an encoder, a binary multiplier and a frequency divider, the output of which is connected to another input of the control unit of the actuating mechanism, the inputs of the encoder are connected to the outputs of the synchronization unit, and the outputs are connected to the control inputs of the scaling unit, pulse binary input the multiplier is connected to another output of the comparison unit.

The drawing shows a block diagram of the device.

The device contains a load sensor 1, a scaling unit 2, a registration unit 3, a load setter 4, a comparison unit 5, an actuator control unit 6, a synchronization unit Ί, an encoder 8, a binary multiplier 9, a frequency divider 10.

The device works as follows.

in a way.

Signals from block 7 synchronization =

arriving at the input of the setter 4,

sets the reference frequency, respectively 3

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leading to the first specified load value. This frequency is fed to the input of the unit, comparison 5, “and the other input of which receives the frequency from the output of sensor 1.

At the outputs of block 5, potential signals are formed that control the operation of the control unit b of the actuating mechanism. When the ratio of frequencies ί _α and Gd at the inputs of the block 5 ί _α > (, the signals at its outputs are 0 and 1, which indicates the need to increase the load. With increasing load, the frequency Γς increases · and with equality 1% = ί _α signals become equal, respectively, 1 and 0, and further loading stops. There is a registration of this load value in block 3 of registration.

Then, using the synchronization unit 7 and the setting unit 4, the reference frequency is set, which corresponds to the next load value, and this value is also processed. Similarly, the operation of the device and with decreasing loads.

The loading rate is controlled as follows.

The input of the actuator control unit (the drive of which is made, for example, on a stepper motor) receives the frequency from the output of the frequency divider 10, the input of which receives the frequency signal of the binary multiplier 9. The frequency value at the input of block 6 is determined as follows:

where K 5 - the multiplication factor of the binary multiplier ·,

η - the number of 'bits of the binary multiplier 9

Κ _χ is the division factor of the frequency divider 10.

At the initial moment ί _ь = 0 and therefore has a maximum value> due to which the loading rate is greatest.

Further, as it grows at the output of sensor 1, frequency 6 _e begins to decrease, therefore, the loading rate decreases. When approaching a predetermined load value control frequency T _e becomes minimum, thereby eliminating the influence of the inertia of the actuator, which results in increased error when mining high loading rate.

In case of equality of frequencies and G & frequency Ga = G "* Gd = 0" becomes

equal to zero and frequency ί _β at the input of the actuator control block b and at the same time signals at the outputs of block 5 stop loading.

The coefficient K5 is set by the signals of the synchronization unit 7, coming through the encoder 8 to the control inputs of the binary multiplier 9, the coefficient K ₂ is set on the basis of the requirements to ensure a uniform output frequency of the binary multiplier 9.

At the same time, the output signals of the encoder 8 are fed to the inputs of block 2, by setting the scale factors on each of the sections of the sensor characteristic, which is non-linear, i.e. there is a correction of scale factors and an increase in the accuracy of recording load values.

This device provides an increase in the accuracy of processing and registration of the specified values of loads.

Claims (1)

Claim A device for programmed control, containing a load sensor connected in series, a scaling unit and a registration unit, a load control unit connected in series, a comparison unit, an actuator control unit and a synchronization unit whose output is connected to the load master input, the second input of the comparison unit is connected to the load sensor output , and one of the outputs with the second input of the scaling unit, characterized in that, in order to improve the accuracy of the device, Encoders, a binary multiplier and a frequency divider, the output of which is connected to another input of the actuator control unit, the inputs of the encoder are connected to the outputs of the synchronization unit, and the outputs to the control inputs of the scaling unit, the pulse input of the binary multiplier is connected to another output of the comparison unit.