SU868700A1 - Digital follow-up system - Google Patents

Description

one

The invention relates to automation and computing, and is intended for use, for example, in the construction of two coordinate recorders.

The known digital tracking system 1 does not have sufficient reliability and hardware simplicity, since for its operation it uses auxiliary control signals, for the generation of which a number of additional units are used, carrying out a number of mathematical converters to it.

Closest to the present invention is a digital tracking system comprising a pulse generator, first and second triggers, and a serially connected execution unit and a motor kinematically connected to the input of the Angle-code converter 2.

The drawbacks of this system are the considerable complexity of the circuit, the presence in which a DC amplifier and an electromechanical tachogenerator imply low system reliability, as well as the fact that the coupling of the movable inverter is displacement-code

with a bitwise comparison device is carried out by flexible conductors, the number of which is equal to the size of the inverter and, in the case of high precision systems, is a significant value.

The purpose of the invention is to increase the reliability and simplify the system.

The goal is achieved by the fact that in a digital tracking system containing a pulse generator, the first and second triggers and an actuator connected in series and the engine are kinematically connected

15 with the Angle-code converter input, multiplexers, summation chl, the third trigger and the address block connected by the outputs to the first inputs of the multiplexers, the first input to the output of the pulse generator, and the second input to the first inputs of the second and third triggers and the output of the young bit converter Angle-code connected to the outputs of the second inputs of the first multiplexer, the output of which is connected to the first inputs of the first adder and the first trigger connected by the second inputs to the output of the second multiplexer, first second inputs to outputs

register, and the third input of the first trigger is connected to the output of the first adder and the second input of the second trigger connected by the output to the second input of the third trigger, the output of which and the output of the first trigger are connected through the second adder to the input of the execution unit.

The drawing shows a functional diagram. digital tracking system (CSF ;,

The system contains the If multiplexer If converter 2 Angle-code, motor 3, generator of 4 pulses, address block. (Shaper address of my choice of lenses) 5, adder b modulo two, control trigger 7, D TpHrrep 8, execution unit (motor control unit) 9 , register 10, multiplexer II, trigger 12 dig, aka, adder 13 modulo two.

The system works as follows.

The code to be processed comes from the input register 10 to the information input of the multiplexer 11. The carriage overlay code from the converter 2 Angle-code is fed to the information input of the multiplexer 1. The bits are compared by the first modulo-two adder to the inputs of which are signals from the outputs multiplexers. The trigger 12 characters on the basis of the signals from the outputs of multiplexers 1 and 11 and the adder 6, modulo two forms the signal .Haji of the difference sign are compared; Aah code bits.

The order and time points of the Nogler changes of the bits to be compared are determined by the address shaper 5, the multiplexers triggered by the generator of 4 pulses, and the low-bit signal of the lower bit of the Converter 2 Angle Code (CCP) synchronized by cycles. The output of the imaging unit 5 of the address of the multiplexers (FAM) is connected to the address inputs of the multiplexers 1 and 11. The code comparison cycle starts from the highest bits. At the same time, the change in the number of the bits being compared is formed. 5 J occurs at intervals of time corresponding to the speed of the carriage of the DSS carriage, at which from given J its position by deceleration, it is possible to bring the system into the RENOIED state (end of processing) with zero speed.

The control trigger 7, to the setup inputs of which signals are sent from the outputs of the first adder 6 modulo two and the lower bit of the SLK 2, produces a pulse with a duration — defined by F / iM 5 and the current position of the DSS carriage.

D-trigger 8 compares the pulse durations from control trigger 7 and time interval.

changes in M5: the next bit of the code for the BUNCH 2, which determines the actual instantaneous speed of the carriage of the DSS. In that case, if the speed of the carriage is higher than the required one at the given mismatch (the difference between the codes of the input register in the LCP), i.e. the time interval of change is less than the duration of the pulse from the control trigger 7

The Q D-flip-flop 8 occurs at the moment of the presence of a single level of the control flip-flop, and a logical one is detected at the output of the D-flip-flop 8. Similarly, when the speed of movement of the carriage is less than the trigger 8 at the output D, a logical zero is written. Obviously, the signal from the output of D-flip-flop 8 unambiguously determines the need for further braking or acceleration of the carriage of the DSS.

0 The second adder 13 modulo two, the inputs of which are connected to the outputs of the D-flip-flop 8 and flip-flop 12 characters, and the output is fed to the input of the engine control unit 9 3

5 the invariance of the control law of the CSS for the direction of movement of the carriage, since braking when the carriage moves in one direction is completely equivalent to acceleration in the opposite direction.

Q The proposed construction of the system allows us to simplify the circuit, eliminate unreliable tachogenerator and DC amplifier. In addition to the construction, the construction of a bitwise comparison

, devices in the form of two multiplexers 1 and 11 and modifier 1 modulo two allow, in the case of placing multiplexer 1 together with a CAM 2, to reduce the number of flexible conductors;

With direct conversion channel

DSS from 2 to N + 1, where N is the addressing depth of multiplexers, depending on the accuracy.

Formula formula

a digital tracking system comprising a pulse generator, the first and

second triggers and an actuating unit connected in series and a motor kinematically connected to the input of the Angle-code converter, characterized in that, in order to improve reliability and simplify the system, it contains a multiplex, summAto, third trigger and address block connected by outputs to the first the multiplexer inputs, the first input - to the generator output

pulses, and the second input to the first inputs of the second and third flip-flops and the output of the second-bit Angle-code converter connected by the outputs to the second inputs of the first multiplexer, the output of which

connected to the first inputs of the first adder and the first trigger connected by the second inputs to the output of the second multiplexer connected by the second inputs to the register outputs, and the third input of the first trigger is connected to the output of the first adder and the second input to the second trigger, connected by the south output to the second input of the third trigger, the output of which and the output of the first trigger are connected through the second adder to the input of the execution unit.

Sources of information taken into account in the examination

1. Authors certificate of the USSR 172510, cl. G 05 B 11/26.

2. USSR author's certificate

 541143, cl. G 05 V 11/26 (prototype)

ABOUT

Claims (1)

Claim A digital tracking system containing a pulse generator, first and second triggers and an executive unit and a motor connected in series with the kinematically connected to the input of the converter * 'Angle-code, characterized in that, in order to increase reliability and simplify the system, it contains multiplexers, adders, the third trigger and the address block connected by the outputs to the first inputs of the multiplexers, the first input to the output of the pulse generator, and the second input to the first inputs of the second and third triggers and the low-level output yes converter * 'Angle-code *' connected to the outputs of the second inputs of the first multiplexer, the output of which is connected to the first inputs of the first adder and the first trigger, connected by the second inputs to the output of the second multiplexer connected by the second inputs to the outputs of the register, and the third input of the first trigger connected to the output of the first adder and the second input of the second trigger, connected by the output to the second input of the third trigger, the output of which and the output of the first trigger are connected through the second adder to the input tionary unit.