SU378810A1 - POSITIONAL SYSTEM FOR SOFTWARE CONTROL BY TURNING MECHANISMS - Google Patents

Description

one

The invention relates to the field of computer technology and can be used in systems for the automatic control of objects containing rotary mechanisms, for example, a turret of a punching press.

Systems for software control of rotary mechanisms are known, containing registers of the desired and actual position, the outputs of which are connected to the corresponding inputs of an adder connected via a serially connected zero-detection unit and a command generation unit to the drive.

The purpose of the invention is to increase the speed of the system.

The proposed system differs from the known one in that the two other outputs of the adder are connected to the corresponding two inputs of the additional adder, the output of which is connected to another input of the command generation unit.

The drawing shows a block diagram of the proposed system.

It contains the register 1 of the desired position and the register 2 of the actual position, the adder 3, the second adder 4, the zero-detection unit 5, the command generation unit 6 for control — the actuator 7 of the turning mechanism.

The system works as follows. The forward / right position is entered into the register / required position, and the reverse binary-decimal code 8421 is entered into the actual position register 2. As a result of adding two numbers, the output of the adder 3 produces an error value in code 8421 with an excess of 3 and its sign. By breaking the circumference of the turning mechanism into 1000 parts, for example, length

the circumference of the turret punch press, half the circumference is 500 parts. In code 8421 with an excess of 3, a number less than 500, for example 499, is recorded; 0111 1100 1100; equal or more

500, for example 500: 1000 OOP OOP. Therefore, the presence of a unit or zero in the fourth bit of the highest tetrad can determine whether the mismatch of half the circle is less than or greater than (equal to), i.e., 500.

The signals "the sign of the adder and" the presence or absence of a unit in the fourth category of the highest tetrade of the adder 3 for the corresponding buses arrive at the second adder 4,

modulo-2 addition. At the output of the adder, a signal is generated that determines the sign of the turret rotation in the shortest direction. When the value of the mismatch is zero

the value of the block; to 5, the detection of zeros generates a signal that goes to block 6, from which follows the command to stop the drive 7.

Subject matter

A positional system for software control of the rotary mechanisms, containing registers of the required and actual position, the outputs of which are connected to the corresponding inputs of an adder connected via a serially connected zero-sensing unit and a command generation unit to the actuator, characterized in that the other two outputs of the adder are connected to the corresponding two inputs of the additional adder, the output of which is connected to another input of the command generation unit.