SU1361587A1 - Time function generator - Google Patents

Abstract

The invention relates to automation and computing. The purpose of the invention is to simplify the time function generator. Gene 5ator contains integrator group 1 ,,, control block 2, bus 3 Start, weight algebraic summation block 4, pulse generator 5, analog storage element 6, counter 7, persistent storage 8 and digital-analog converter 9. Time function generator based on the use of corrective negative feedback, acting in the nodes of the reproduced function and allowing to simplify the device by eliminating the second channel of the functional transformation while maintaining such properties, such as the absence of accumulation of integration error in the transition to the new nodes of interpolation. 1 il. from $ with

Description

The invention relates to analog and hybrid computing and can be used in analog and hybrid computers, in graphic information display devices, as well as in specialized computing devices.

The aim of the invention is to simplify the time function generator.

The drawing shows a block diagram of the generator functions of time.

The generator contains a group of integrators 1 ,, ... / If, control block 2, bus 3 Start, block 4 weight algebraic summations, generator 5 pulses, analog, storage element 6, counter 7, read-only memory 8 and a digital-to-analog converter 9. Block 4 performs the weighted summation of the individual components of the input signals with the corresponding signs.

connected with the output of the integrator 1 "n with the output of the converter 9, are set equal to - gk a at the input,

associated with the output of an arbitrary.

P

integrator 1

where k

ten

 (n-k)

 1, n-1.

Thus, in the initial state, at the output of block 4, there is a voltage

15 and

Z (to) n

& t, 4t

 (to) n

Z (t ") n

, ("-)

(to) n

(nk) dt

(n-1) t

(3)

20 The moment of the device start-up is determined by the leading edge of the pulse supplied to bus 3. Simultaneously, a first pulse is generated at the output of the generator 5 pulses, the other Time Function Generator operates 25 and is formed through equal intervals as follows. Pulse length

In the initial state, in the memory at the output of the generator 5 pulses) —the device 8 is recorded in a sequence — it must be minimal, but the ordinate codes of the nodes are sufficiently formed to correspond to the recording element of the storage element 6.

at remote values of the argument at interval t, at the output of counter 7 -; the address code of the ordinate of the first node y, in the output register of the memory device 8 is the ordinate code of the node y ,. The integrators 1, 1, ..., 1, ..., 1 are applied respectively to the voltage of the initial conditions of integration, corresponding to the zero node:

-

,) (to) (n-1) an.,; (n-2) a „.2, ...;

Z (to) (n-k) fa,. ,, ... iZ (t,) a

Then, in the interval of changing the time argument t ~ - 4t, the output of the integrator 1 should produce an output signal described by the equation

Z (t) ao + a, (t) + a, (t) +. .. + an.t

. b - torus 1..

+ ... + (2)

input voltage integration- gear ratios

the inputs of block 4 (without the sign),

connected with the output of the integrator 1 "n with the output of the converter 9, are set equal to - gk a at the input,

associated with the output of an arbitrary.

P

integrator 1

where k

 (n-k)

 1, n-1.

Thus, in the initial state, at the output of block 4, there is a voltage

5 and

Z (to) n

& t, 4t

 (to) n

Z (t ") n

, ("-)

(to) n

(nk) dt

(n-1) t

(3)

the action of the input start pulse control unit 2; switches integ;

rators 1 ,, 1

 X

at the exit

1 p to pe35

12

The integration GEM, a voltage U is set at the output of the storage element 6. At the end of the output pulse of the pulse generator 5, the counter 7 is incremented, under the action of which the ordinate code of the second function node y is entered into the output register of the 4Q memory 8.

Ignore the accumulation of error over the time interval It, then at the moment

 dt exit in45

Tegrator 1 have

Z (t,) Z (to) + Z (... +

) /) t

(n-k)

{n-1)

+ ... +

(to) -dt

h-1

(n-1)

and- / it

n

(four)

Substituting the value of U from (3) to (4), find

z (t;) y ,.

This means that at the specified time t, the value of the output

The signal of the generator of functions of time coincides with the nodal value. At the same time, under the action of the next pulse from the output of the generator 5 of the pulses at the output of the storage element 6, a voltage equal to

Z (tjn Z (t,) n

at

.Jn (n-1) dt

(five)

In the output register of the storage device 8 is entered the code of the next ordinate. If for the current time interval / jt the accumulation of error can be neglected, then at the time t t, + d, t the output signal coincides with the node value

ZCt) y.

Further, the above steps are repeated.

Thus, despite the exclusion of the second channel, the dependence formed has the following properties: the function is represented by a power polynomial in each segment, the continuity of the function and its derivatives is up to (n-1) - and inclusive, the coincidence of the function with the given node values, the lack of accumulation of integration error .

Compiled by S.Kazinov Editor I.Nikolaychuk Tehred A.Kravchuk Proofreader N.Korol

Order 6293/50 Circulation 671 Subscription

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Invention Formula A time function generator containing a group of integrators, each of which, starting from the second, is connected to a signal input to the output of a previous group integrator, a counter whose output is connected to the address 0 of the permanent memory connected to the input of a digital-analog converter, pulse generator, the start input of which is connected to the bus Start 5 of the time function generator and the start input of the control unit connected by the output to the inputs of the control of the operation of the integrators of the group, in Setting the initial conditions of each of which is connected to the corresponding input of the initial conditions of the time functions generator. In order to simplify the time functions generator, it contains an analog storage element and a weight algebraic sum block j connected by inputs to the outputs of the integrators of the group and the output of the digital-analog converter, and the output to the signal input of the analog storage element connected by the recording control input to the output of the pulse generator and the counting input ohm of the counter, and the output with the signal input of the first of the group integrators, the output of the last group integrator being the output of the time functions generator. 0 five 0 five