SU732837A1 - Digital hyperbolic function generator - Google Patents

Description

one

The invention relates to the field of computer technology and can be used in digital control and monitoring systems as a specialized computer, in computer-controlled machine tools, in digital modeling machines, etc.

A device for modeling hyperbolic functions is known by the piecewise linped method. approximations. A CS containing a controlled frequency divider, a memory unit for storing the slope of the approximating segments, and a control unit. The disadvantage of this device is a significant amount of memory in the case of increased accuracy, reproduction with a large number of approximation segments.

The closest technical solution to the invention is a digital generator of hyperbolic functions comprising a clock pulse generator, a prohibition element, a frequency divider of the approximation sections, a zerder element, an approximation sections counter, a result counter and a permanent memory unit (ROM). The output of the clock pulse generator through the prohibition element is connected to the input of the frequency divider of the argument and the frequency divider of the approximation sections. The output of the frequency divider of the argument is connected to the output of the argument counter, the output of which is connected to the prohibition of the prohibition element, whose control input is the control output of the generator of hyperbolic functions. The output of the divider part of the approximation sections through the delay element is connected to the input account

15 tick approximation plots.

The disadvantage of such a generator is its complexity, which increases with an increase in the accuracy of the approximation due to

large amount of memory.

Claims (1)

The aim of the invention is to improve the digital generator of hyperbolic functions. Psytavleina dkhl-ryaetsya chain in that preshyuzhenny generator contains a register, the first and second controlled frequency dividers, the subtraction unit and the marsch block. The control and information inputs of the register are connected respectively to the code of the frequency divider of the approximation sections and the output of the counter of the approximation sections, the control inputs of the first and second frequency dividers are connected to the register output and the output of the approximation sections counter, respectively. The output of the prohibition element through the first and second controlled frequency dividers is connected to the inputs of the subtractor, the output of which is connected to the input of the result counter via a scaler. The functional diagram of the digital generator of hyperbolic functions is shown in the drawing. It contains a clock pulse generator 1, prohibition element 2, frequency divider of argument 3, counter argument 4, frequency divider of approximation sections 5, delay element 6, counter of approximation sections 7, register 8, first 9 and second 10 controlled frequency dividers, subtractor 11, the mapping unit 12, a result counter 13, enabling 14 and prohibiting 15 inputs of the trigger unit. The generator implements the principle of piecewise linear approximation with a constant quantization step equal to uX rnoix / where m 2 (for the implementation). Argument X is taken as 6 in the form of a function of the number кв of the quantization step and the conditional variable t, taking the value O 41 $ 1 in step D. (. The function specified for reproducing will be written as n -tt m-tn-V i) the increment V dl (n -1) and n approximations are presented in the form - V - al1 pn mCn-4l «hh / 14 P n- () (m-pm) and the piecewise-linear approximating function is recorded as (Un-4n b., - -Arc D ((Expression: eeniey, t / (nn-G1) (gn-n-1} is a function of the angular coefficients of the approximating segments, depending only on the variable n. For its realization yi and im For the implementation of the standard (gp-p) (mnt / 1) jB, the generator composition includes two controllable divide frequencies 9 and 10, the load factors of which vary, respectively, as (PL-p) and (m-ri +), and the outputs are connected to the pulse subtraction unit 11. Their total transfer coefficient is equal to LA4 (mn) (mn 1) (m-nXf -nt O) The difference in the transfer coefficients by one is provided by the inclusion of register 8 in the device. At the same time, the current number the subtraction of counter 7 is equal to (mn), and at the outputs of register 8 - (mn +1). Obviously, in the initial state, the number m is written to the counter 7, and the number (GP +1) to the register 8. The generator of hyperbolic functions works as follows. When the enable signal is applied to the bus 14, the block 2 is opened to pass the pulses to the inputs of dividers 3, 5, 9 and 1 O. . Divisor 5 counts Uta’s approximation step; g. YES. where K y is the division factor of divider 3 necessary to obtain the required discreteness of the output variable. -SO- scale k, the coefficient for the argument K. At the time of the end of the next step A, the pulse from the output of the divider 5 controls the write-to-register 8 numbers (PL-p) from counter 7 and enter through the delay element 6 into the counter 7j subtracting from the number in it. The pulses entering the subtractor 11 are pulsed to the required scale by block 12, whose multiplication factor is Oim. -z. 0 y where the scale factor for the output variable. -O is a variable multiplier. If the value of K turns out to be slightly larger than one, then the value of Vs should be increased. The number m of approximation plots is determined from the condition where Q, is the approximation error associated with the number m dependence: - (wavic N In MOMetrr arrivals counter 4 of the specified chiolo-ig.1pulse equivalent of the argument X 1O he rewinds and closes the start block 2, and the result counter 13 records the value of the function that passed all intermediate values from O to v In case of a change in the O multiplier, only the value Kv Technical and economic efficiency of the proposed device is due to the exception of the block of permanent memory, which provides a simple preparation and change of reproducible dependence, increase accuracy without significant condition of the device. Invention Digital hyperbolic function generator containing a clock generator, a prohibition element, argument frequency divider, argument counter, approximation plot frequency divider, delay element, approximation plot counter, cut counter An output of the clock generator pulse through the prohibition element is connected to the 7 7 7 argument frequency divider and the frequency divider of the approximation sections, the output of the frequency argument divider is connected to the argument counter, which is connected to the prohibition input of the prohibition element, the control input of which is the control input of the digital generator of hyperbolic functions; the output of the frequency divider of the approximation sections through the elements-delays is connected to the gate of the counter of the approximation sections, characterized in that, in order to simplify the digital generator of hyperbolic functions, it contains a register, first and second controlled frequency dividers, a subtraction unit and a scaling unit, and the control and information inputs of the register are connected respectively to the frequency divider of the approximation sections The simulations, the control inputs of the first and second controlled frequency dividers are connected respectively to the register output and the output of the counter of the approximation sections, the output of the prohibition element through the first and second controllable frequency dividers connected to respective inputs of a subtractor whose output is connected through a scaling block to the input of the counter result. Sources of information taken into account during the examination 1. USSR author's certificate No. 376778, cl. q 06 F 7/38, 2, USSR Copyright Certificate No. 415666, cl. G About F 7/38 (prototype). four 12 //