SU760132A1 - DEVICE FOR REPRODUCTION OF FUNCTIONS - Google Patents

Description

one

Isobenie refers to the field of automation and computer technology, in particular, to hybrid devices for reproducing specified functional dependencies on. several * input arguments.

A functional converter is known that contains digital-analogue argument converters, adder,. and non-linear decoder block performed on managed ^and nenny functional keys and one variable converters'

The disadvantages of the device are the complexity of the constructive implementation of 15 in the case of reproducing the functions of b-. more than two variables, as well as the complexity of reproducing the code of functional dependencies.

It is also known a device for the multiplication of functions of several variables, containing input converters of the form of presentation of arguments, an addressing block, a coefficient memory block, and a Y data interpolation block.

The disadvantages of the device are

limited functionality to reproduce a number of functions of several variables. thirty

2

The closest to the invention is a device for reproducing functions, containing an increment analysis block, connected by an output to the first input of a sampling unit, the second input of which is connected to the output of a scale counter, and the third input is connected to the function code bus, and the output of the sampling block is connected to the first. the input of the inverter connected by the second input to the parity code bus, and with the first input of the function adder connected by the second input to the output of the inverter, the third input to the code bus of the initial values, and the output to the input of the output digital-to-analog converter; increments, the fourth input of the sampling unit, the fourth input of the function adder and the first input of the scale counter connected by the second input to the scale code bus are connected to the output of the control unit, and the argument input bus is connected to the first input om of the argument adder and through an analog-to-digital converter connected to the input of a digital-to-analog argument converter, the output of which is connected to the second input of the adder argument £ 3].

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³ 760132, · 4

The disadvantage of the device is a limited class of reproducible functions, namely, the device allows you to play various functions of only one argument.

The aim of the invention is expanded.

renier class reproducible functions ³

Ways to play functions from multiple arguments.

For this purpose, a device for reproducing functions, containing an increment _ -analyzer connected you- “About the move to the first input of the sampling unit, the second input of which is connected to the output of the scale counter, and the third input is connected to the function code bus, and the output of the block samples are connected to the first 15 input of the inverter, connecting ^{: the} second input to the parity code bus, and the first input of the adder of the function connected by the second input to the inverter output, the third input to the initial values code bus, and the output to the input output digital analog trunk converter, wherein · the first input block analysis priraschenyy fourth input sample block, the quarter ~, fifth input of the adder funkDii first ^Ζ3 input scale counter, - coupling the second input of the bus-scale code, connected to the output of the control unit, and an argument input bus boedinena with . The first is the input of the adder of the argument and .30 through an analog-to-digital transform- '· ;. The cable is connected to the input of the digital-analog converter of the ArcFum, the output of which is connected by the second input of the argument adder, the analog-to-digital conversion is additionally 35; drivers, digital-to-analog converters' argument, argument arguments,

I am the Maximum Pririkheniya selector, the connected output-40 house with the second input of the increment analysis block and the input connected to the outputs of the combining argument, with the first input of each Igo (1 έ 6 - 1, where ϋ. Number of friends) of the additional adder of the argument connected by the second input through the ί-th additional digital-to-argument argument converter with. out! -H, additional analogue-to-digital converter; five"

the input of the 1st encoder argument is connected to the input bus of the corresponding argument and to the input of the Ιth additional analog-to-digital converter, the output of the main digital converter is connected to the input of the C -th argument encoder, and the outputs of all the encoder arguments under '* Klyuchy to the appropriate. the inputs of the sampling unit connected by the output to the third input of the increment analysis unit.

The device contains analog-digital converters 1, an input of each. The first of which is connected to bus 2. input of the corresponding argument and to the first input of the corresponding adder 3 argument, the second input of which is connected through the corresponding digital-analog converter 4 arguments to the output of the corresponding converter 1. and the input of the corresponding encoder 5 argument. The total number of converters 1 and 4, adders 3 and encoders 5 is determined by the number of arguments of the functions being reproduced. The outputs of all ¹ adders 3 arguments connected to the inputs of the selector 6 maximum increment.

Sampling unit 7 is connected to the first input with the output of the incremental analysis unit 8, the second input to the output of the scale counter 9, the third input to the function code bus 10, the fourth input to the output of the control unit 11, and the remaining inputs to the encoder outputs 5 arguments. Block 8 analysis of increments connected by the first input to the output of the block. 11 control, the second input to the output of the selector 6 maximum increment, and the third input to the output of block 7 of the sample.

Sampling block 7 is also connected to the first input of the inverter 12 connected by the second input to the 13-bit bus, and to the first, the input of the adder 14 functions connected to the second input to the output of the inverter 12. The third and fourth inputs of the adder 14 functions respectively connected to the spring 1.5 the code of initial Values and with the output of the 1T control block. The output of the adder 14 is connected to the input of the output digital-to-analog converter 16. The scale counter 9 is connected with the first input to the Output of the control unit 11 and connected with the second input to the bus 17 of the Scale code. ;

The device forms piecewise linear functions P (x, γ,.,. Ζ), defined by the expression

± F (.. X, y ,. ζ) = Μ - Ρ (x _0, y _0, · ζ _ο..) ±

- Μ.Σ dr Gh; , y; , . . ζ;,

E ⁽ xb "

- (x (, y;, · ·

where x, y ,. . . ζ M

8 (ho »wo ···· ² ^

g8 [... 3

. .ζ- _m )> 33

- input arguments;

- scale factor;

- the initial value of the function;

- the value of the function increment upon the transition of the set of arguments from the nodal values (x;, y · ,, ..ζ;) to the nodal values

( ^χ ΐ-n "Υ-ί + <> · · ^g <+ ()>

- interpolation node number

The drawing shows a block diagram

devices (for the case of reproducing the function of three arguments).

760132

The device for reproducing functions works as follows.

At the initial moment of time, determined by the “start” signal on the input bus 18 of the control unit 11, analog-digital converters 1 begin to convert 5 to the voltage codes of the arguments x, y,. ..ζ; coming to the input bus 2 devices. The resulting codes are fed to the inputs of the corresponding analog-to-analog converters 4 arguments and encoders 5 ar-. gumentum. With the help of converters 1 and 4, which are low-bit (4 + 6 binary digits), the interpolation points are detected. With the help of adders 3 arguments, the current values of the increments of the corresponding arguments are determined. By forming the differences between the current values of the arguments from busses 2 and their nearest node values from the output of the converters 4.

In the simplest case, the selector 6 selects the maximum value of the argument increment from all the argument increment values arriving at its 25 inputs from the outputs of the adders 3. In the case of increased demands on the fidelity of the selector. 6 can form the maximum increment as a square root · from the sum of 30 squares of the increment values of the arguments. The increment analysis block 8 generates an increment code depending on the increment value from the output of the selector 6 and the type of playback of the functions defined by the code of the function type on the bus 10. The argument encoders 5 by the code on their inputs form the resulting value sampling address;. and the increment sign of the function. By this other address code, as well as by the increment code from the output of block 8 and the code of the type of functions from the bus 10 in block 7, the sample is selected and read to the output for a fixed period of time for all functions. Storing the increment codes in block 7 instead of the full function codes can significantly reduce the amount of information written to this; block .. __

The number of samples increments dE varies depending on the curvature of the reproduced functions, increasing, With increasing curvature. The algebraic sum of value codes for increments DR accumulates in the adder 14 55

functions. On bus 15, the adder 14 also feeds the initial value of the function code P (x ₀ , y _o , ... ζ ₀ ). The increment sign of the DR to the adder 14 through the inverter 12 comes in a direct or reverse code depending on the parity code of the function on the bus 13. This simplifies the reproduction of symmetric functions, the conversion function code formed in the adder 14 65

transducer 16 into the voltage supplied to the output 19 of the device.

The inter-synchronization of all the blocks, the device, the formation and counting of time intervals is carried out by the control block 11.

Scaling the transformed functions performed by the scale counter 9 according to the scale code ^- 17. bus. )

The sequence of clock pulses from the output of the control block 11 directly for gating and through the counter 9 enters the block 7

'sampling. If the function does not scale (1: 1 scale), then during the time intervals when information from block 7 is read, one read pulse is generated at the same address and

/ only one DE value is formed.

'If the reproduced function is scaled, then by the same

address is the repeated reading of information from block 7 of the sample, and the reading ratio is equal to! scale. To ensure multiple readings for one and the same address, the frequency of the clock pulses is chosen such that during multiple read times none of the arguments x ".,. . .ϊ formulas did not have time to change in a noticeable way.

The unit 8 for the analysis of increments depending on the maximum value of the increment of the argument generates a code for the number of subintervals for each fixed time interval. The number of subintervals of the partition of the function is formed by block 8 so that the absolute error of approximation does not exceed a specified value. In this case, the corresponding coding of the function is performed in block 7 of the sample. If the function being split into 'sub-intervals is scaled, then at the corresponding moments of time the counter 9 of the scales generates additional read pulses from the sampling block at the address of the spins as in the above.

In implementations of sampling block 7, it is advisable to use multiple addressing, cascade connection, the method of equivalent algorithm, programmable logic arrays and other techniques that allow reproducing complex functions of several arguments when using commercially available BIS ROMs in conditions of acceptable hardware costs.

The introduction of the device in comparison with the prototype of new nodes and links allows you to significantly expand the scope of the device, by reproducing functions from several input arguments.

7

760132

Claims (1)

A device for reproducing functions, containing an increment analysis unit, connected by an output to the first input of a sampling unit, the second input of which is connected to the output of a scale counter, and the third input is connected to the bus of the function code, the output of the sampling unit being connected to the first input of the inverter connected by the second input to the parity code bus, with the first input of the adder function connected by the second input to the output of the inverter, the third input to the code bus of the initial values, and the output to the input of the output digital channel the first input of the increment analysis block, the fourth input of the sampling block, the fourth input of the function adder and the first input of the scale counter connected by the second input to the scale code bus are connected to the output of the control unit, and the input argument bus is connected to the first input of the total number The mouth of the argument and through an analog-to-digital converter is connected to the input of a digital-to-analog trans. argument maker, the output of which is connected to the second input of the argument adder, from it with the fact that, in order to expand the class of reproduced functions by reproducing functions from several arguments, the device additionally 'introduced analog-to-digital converters, digital-analogue converters of the argument, adders of the argument. eight the argument encoders and the maximum increment selector connected by the output to the second input of the increment analysis block and connected by inputs to the outputs of the argument adders, the first input of each ϊth (1έ έ В - 1 where 8 is the number of arguments of the reproduced function) of the additional argument adder connected the second input through the ΐth additional digit • β is the analogue analogue converter 't converter with the output of the ΐth additional' analog-digital converter and the input of the ϊth argument coder, connected to the input bus corresponding The input of the main analog-to-digital converter is connected to the input of the E-th encoder of the argument, and the outputs of all encoders of the argument are connected 20 to the corresponding inputs of the sample block connected by the output of the third input of the analysis increments. .