SU444229A1 - Code device for controlling the actuator - Google Patents

Description

one

The invention relates to the field of digital automation and can be used in secondary measuring devices, in information and measurement systems, in automated production control systems.

The known code devices for controlling the actuating mechanism, containing a drive motor, power amplifiers, a feedback sensor, a pulse counter and triggers, have low noise immunity and complex control of the operating mechanism.

The purpose of the invention is to improve the noise immunity of the device and simplify the control of the actuator.

This is achieved in that the device contains a second pulse counter, the first counting inputs of the first and second pulse counters are connected to the output of the pulse generator, the second counting inputs through the input unit to the output of the feedback sensor, the setup inputs to the corresponding outputs of the input unit, and outputs - respectively to the first and second inputs of the trigger.

The drawing shows a diagram of the proposed device.

The proposed code device contains master I, input block 2, sensor

feedback 3, drive motor 4, displacement transducer 5, power amplifiers 6, trigger 7, pulse counters 8 and 8, pulse generator 9.

The directional signal and the control code come from code setter 1 (for example, an operator’s console, a centralized control system, a controlling computer) to the inputs of the input unit 2. Depending on the direction sign ("Forward or" Back), the code passes to output 11 or 12 of block 2, and the feedback sensor pulses are respectively output 13 or 14. The drive motor 4 (electric, hydraulic, pneumatic) is connected to the actuator 10 via a displacement transducer 5 (for example, a gearbox, a crank, rail) .

Engine 4 is controlled

through power amplifiers 6 by trigger 7, to the inputs of which overflow pulses come from counters 8 and 8. In this case, the code signal is fed to the installation inputs of counters 8 or 8 through input block 2

depending on the sign of the direction ("Forward or" Back). The first counting inputs of counters 8 and the pulses from generator 9 arrive. The second counting inputs of counters 8 or 8 receive pulses from the sensor depending on the sign of the direction.

feedback 3 connected to the output shaft of the displacement transducer 5. Depending on the type of motor 4, amplifier 6 can be of various types, in particular, for an electric motor - transistor amplifiers of class D, thyristor circuits, magnetic amplifiers and others.

The operation of the code device for controlling the actuating mechanism is as follows.

In the initial state, between the pulses acting on the inputs of the trigger 7 is equal to half the time interval between the counters overflow pulses, i.e.

-

where t is the time interval between pulses acting on the inputs of the trigger 7;

L - the capacity of the counters 8 and 8;

2 / - the frequency of the pulse generator 9.

N 2 /

is provided

Time shift t

delay, which is set at the output of one of the counters (for example, counter 8). Elpja, the duty cycle of the pulses at both outputs of the trigger 7 are equal, and consequently, the torques “and the motor shaft 4 are also equal and opposite in direction. The resulting moment is missing and the output shaft of the actuator 10 is stationary.

Pr: and a non-zero code, simultaneously a direction signal appears on one of the TIRS of a sign, for example, "Forward, and output 11 of input block 2 contains a code that is written to counter 8. Since it is in the initial state counters 8 and 8 are in a consistent state, then the recorded code determines the mismatch Tx value. The pulses of the generator 9 arrive at the counting inputs of counters 8 and 8, where they are summed. When overflowing counters 8 and 8, overflow impulses 1 appear at their outputs, the additional shift of which relative to each other is determined by the code recorded in counter 8. As a result, the time interval between pulses at the inputs of trigger 7 changes relative to the original and accordingly the pulse duty cycle changes at its outputs, to which the power amplifiers 6 are connected. This leads to the formation of the resulting torque, under the action of which the actuator 10 moves. This feedback Occupancy 3 outputs a pulse each time the shaft is rotated to a certain goal Yes, which, via the input unit 2 enters and summed in the counter 8. dotizhenii time shift between them pulp

 - the wells are full and the values of t

2 /

on the outputs of the trigger 7, and thus the torques. On the motor shaft, the motor 4 becomes the same and the motor 4 stops. The inoBopOTA angle of the engine 4 is uniquely determined by the price of each feedback pulse (YES) and the number of these pulses, which, in turn, is determined by the amount of code recorded in counter 8.

When the control code decreases on another tire, the sign Io is a signal corresponding to the direction of movement of the Pazad code through input unit 2 enters counter 8. This changes the time interval τ and, correspondingly, the duty ratio at the outputs of the trigger 7, and causes reverse movement of the actuator shaft 10. In this case, the feedback pulses are summed up in the counter 8. The engine 3 is shifted until the time interval between the pulses at the trigger inputs reaches again the good

L

17 Thus, in the proposed device, the duty ratio of the trigger 7 from the fixed

0 value corresponding to the stationary state of the output shaft of the actuator. In this case, the supply of the control signal in the forward code and its sign and the adaptive mechanism responds by moving the output shaft (without intermediate stops) in the required direction by a specified amount.

Subject invention

The code device for controlling the actuating mechanism, containing a drive motor, the shaft of which is mechanically

connected through a displacement transducer with the shafts of the actuator and feedback sensor, the first and second control inputs of the drive motor are connected respectively through the first and second power amplifiers to the first and second outputs of the trigger, a pulse generator, an input unit, the inputs of which are connected to the outputs of the code unit , and our impulse counter, characterized by

that, in order to improve noise immunity and simplify control of the actuator, it contains a second pulse counter, the first counting inputs of the first and second pulse counters are connected to

the output of the pulse generator, the second counting inputs through the input unit to the output of the feedback sensor, the setup inputs to the corresponding outputs of the input unit, and the outputs respectively to the first

and the second trigger inputs.

11 t / ji

ff i,

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