SU684584A1 - Multichannel code-to-shaftangular position converter - Google Patents

Description

(54) MULTICHANNEL CODE CONVERTER IN ANGULAR MOVEMENT OF SHAFTS

the protection is connected to the first input of the pulse sequencer, to the output of the decoder, and to the first input of the element I, to the second input of which the second output of the number-pulse converter is connected. The output of the protection unit is connected to the second input of the control signal generator, the third input of which is connected to the output of the control unit and to the fifth input of the memory unit. The first output of the driver of the control signals is connected to the second input of the driver of the pulse train, and its second output is connected to the driver of the failure signal. The first input of the control unit is connected to the trigger output, the second to the output of the AND element, and the third to the second input of the number-pulse converter and to the input of the feedback signal generator.

FIG. 1 shows a structural electrical circuit of a multichannel code converter in the angular displacement of shafts; in fig. 2 shows a temporary diagram of the operation of the device.

The converter contains a clock pulse generator 1, connected to the first inputs of protection block 2 and control signal generator 3, the second input of which is connected to the output of protection block 2, and the third to the output of control unit 4 and to the first input of memory block 5 respectively the second, third and fourth inputs with the outputs of a serially connected pulse generator 6 of a pulse sequence, trigger 7 and a channel address driver 8, the output of which is also connected to the input of the decryptor 9. Fifth input and output of memory block 5 These are respectively connected to the potential output and input of the pulse-to-digital converter 10, the pulse output of which through the switch has 11 channels, the phase switches 12 and the amplifiers 13 are connected to the phase windings of the stepping motors 14. The output of the descriptor 9 is connected to the second input of the unit 2 protection and to the first input of the generator 6 of the pulse sequence, the second input of which is connected to the first output of the generator 3 of the control signals connected by the second output to the input of the forms irovatel 15 failure signals.

The output of the trigger 7 is connected to the first input of the control unit 4, the second input of which is connected to the output of the element 16, which is connected by inputs to the output of the descrambler 9 and to the pulse output of the number-pulse converter 10, and the third input to the output of the feedback generator 17 connected to the outputs of the amplifiers 13, and the output of the feedback signal shaper 17 is also connected to the second input of a number-pulse converter 10. The corresponding outputs and inputs of the fault signal shaper 15 and the control unit 4 are connected us to the control system (CS).

FIG. 2 marked:

a - signals at the output of the generator 1 clock pulses; b - signals at the output of the driver 3 control signals; in - signals at the output of block 2 protection; g - signals at the output of the imager 6

pulse sequences; d - signals on a single output of the trigger 7; e - signals at the pulse output of the number-pulse converter 10; W - signals at the output of the control unit 4; h - signals at the output of the feedback signal generator 16; and - signals on the first output of the switch 11 channels; k - signals at the second output of the switch 11 channels; l - signals on the i-th output of the switch 11 channels; m - signals on p-1

switch output 11 channels; n - signals at the output of the element And 16 (n-th control channel).

The Converter operates as follows.

Under the influence of the clock pulses generated by the generator 1 with a frequency equal to the maximum allowable frequency of the control pulses of the pitch motors 14, the driver 3 of the control signals is triggered. At its first output, in the presence of permitting potentials, a control signal is generated at the second and third inputs, which triggers the pulse trainer 6. The signal of the clock pulse generator 1 also triggers a glare 2 of protection, the output of which produces a inhibitory potential blocking the restart of the driver 3 control signals.

When starting the imager 6, a sequence is generated at its output.

pulses. The number of pulses in each sequence is 2p, where n is the number of output channels of the converter, of which n-I channels are serviced by executive jog motors; 14, and the n-th channel

is a control.

The impulses of the imager 6 arrive at the memory block 5 and the trigger 7, alternately setting it in the position corresponding to the operation modes of the block 5 -

“Reading or“ writing. Each odd sequence pulse sets the trigger to the position that sets the operation mode of the 5 “read, each even number to the position that sets the“ write.

The signal from the trigger 7, when set to the read position, triggers the control unit 4, on which the potential is generated at its input which blocks the re-formation of the control signal at the first output of the driver 3.

In the "read from memory block 5" mode, the magnitude of the rotation angle increment is read at the address whose code enters block 5 from the driver 8 channel addresses. The binary code of the angle increment value, read from block 5, is fed to the number-pulse converter 10, which analyzes the value of this increment value and, if it is not zero, generates a single increment pulse at its pulse output. The output channel address code generated by the channel address generator 8 is deciphered by the decoder 9, which controls the outputs of the channel switch 11 with its outputs.

The unit increment pulse from the number-pulse converter 10 through the switch 11 channels enters the phase switch 12 of that output channel, the address of which is set on the channel address generator 8. The phase switch 12, through amplifiers, switches the phase windings of the corresponding scapular motor 14, which begins with the development of a single increment of the angle of rotation.

At the same time, signals from amplifiers 13 are fed to shaper 17 of feedback signals.

The feedback signal, from the imaging device 17, arriving at the second input of the number-pulse converter 10, subtracts one from the current value of the increment value of the angle of the given channel. The same signal, entering the control unit 4, removes the blocking potential at its output.

The next even-numbered impulse from the driver 6 sets the trigger 7 to the “write and re-start” position of the block 5.

In this case, block 5 records the increment value of the angle received by the number output from the potential output of the pulse converter 10 by one, and one of the bits of the same memory cell indicates a healthy state of this output channel entering block 5 from block 4 control.

In the event of a malfunction or failure of any of the converter nodes in this channel (channel switch, phase switch, amplifiers), when outputting a single increment, there are no signals at the output of the corresponding amplifiers 13 and a feedback signal at the output of the driver 17 is not generated. At the same time, the unit is not subtracted from the increment value in the number-pulse converter 10, and the blocking potential is saved at the output of the current control unit 4. In this case, the value of the increment value recorded in memory block 5 at the address of this channel remains unchanged, and at the discharge of this cell, reserved for storing the status indicator of the output channel, a symptom of the channel is recorded in the current output increment cycle entering block 5 in the form of a blocking potential from block 4 of the current control.

If the absence of a signal at the output of the corresponding amplifiers 13 was due to a random failure at one of the nodes of this conversion and when outputting a single increment through this channel in the next output cycle, the failure did not repeat, when writing the modified increment value, the sign serviceable

CONDITION OF THE CHANNEL.

The next odd pulse by number from driver 6 starts block 5, sets trigger 7 to read from block 5, and in channel 8 driver, the output channel address is incremented by one. At the same time, the output of a single increment and control over its passage are repeated for the next output channel address in order.

Then, in the same way, a single increment is output to all n - 1

channels.

The last n-on pair of pulses of the sequence from the imaging unit 6 ensures the operation of the converter via the control channel, which corresponds to the address of the last cell in memory block 5. During the operation of the converter via the control channel, the converter's nodes common to all output channels are: block 5, driver 8, channel addresses, decoder 9, number-pulse converter 10.

The operation of the converter over the control channel occurs as described above, with the difference that the unit increment pulse does not pass through the channel II switch and the feedback signal at the output of the imaging unit 17 is not generated, and the blocking potential at the output of the control unit 4 is reset by the control pulse from the element And 16, which will form it with the correct operation of the converter nodes by a single increment pulse with the number-pulse converter 10 gated by the resolving potential from output g encoder 9 corresponding to the pilot channel address. The last pulse in the series from the imager 6, even in sequence number, starts block 5 to record the unmodified increment value at the address of the control channel. In this case, the signal from the decoder 9 corresponding to the address of the last channel is fed to the driver 6, blocking it, as well as to the protection unit 2, removing the inhibiting potential

from the driver 3. The next series of pulses at the output of the driver 6 is formed with the arrival of the control of the driver signal 3.

Thus, for each control of the signal of the driver 3, a single increment is output sequentially to all channels and the control of its passage to the phase windings of the stepper motors 14.

In the event of a malfunction of any converter node: memory block 5, channel address generator 8, decoder 9, number-pulse converter 10, the control pulse at the output of the AND 16 element is not generated when the control channel of the converter is operating, and the current 4 control, the blocking potential is maintained. In this case, with the arrival of the next clock pulse of the generator 1, the driver 6 does not start, and at the second output of the driver 3 of the control signals, a signal is generated that starts the driver 15 of the failure signal. At the same time, at the output of the imaging unit 15, a failure signal is generated, which enters the control system and signals a transducer malfunction. The reset of the former 15 and the unit 4 of the current control 4 occurs on signals from the control system.

Malfunctions in the operation of the converter can also occur as a result of an increase in the frequency of the clock pulses of the generator 1 or a decrease in the frequency of the pulses of the driver 6 beyond the permissible limits. In this case, the time required for outputting single increments to all output channels may exceed the pulse period of the clock generator 1. Protection against such failures is performed by block 2, which blocks the triggering of the generator 3 of control signals until it ends the cycle of outputting a single order to the last channel, and the signal from the decoder 9, corresponding to the address of the subsequent channel, does not remove the blocking potential at the output of the protection unit 2.

Claims (2)

1. USSR Author's Certificate No. 463134, G 08 C 19/28, 1973. 2. USSR Author's Certificate No. 574805, G 08 C 11/00, 1976.