SU1221650A1 - Device for determining function extrema - Google Patents

Abstract

The invention relates to the field of automation and computer technology, can be used in process control systems and allows the determination of local extremums of a function. The purpose of the invention is to expand the scope by determining the sign of the extremum. The device contains a register, a combinational adder, a shift register and two elements I. The extremum sign is formed by a shift register and two entered elements I. The code of the function being analyzed goes to the first group of inputs of the adder, the second group of inputs of which is written in the previous one tact In the event of an accumulator overflow, the overflow signal is stored in the lower order of the de-shift register. As a result of shifts when writing subsequent function codes, the overflow value of the adder in the current cycle is recorded in the second register shift register, and the overflow value in the previous cycle is recorded in the third discharge, the analysis of which makes it possible to judge the extremum of the function. 1 ill., 1 tab. with S ate od sp

Description

The invention relates to automation and computing and can be used in process control systems.

The purpose of the invention is to expand the field of application of the device by determining the sign of the extremum.

The drawing shows a diagram of a device for determining the extrema of a function.

The device contains a register 1, a combinational adder 2, a three-bit shift register 3, two elements AND 4 and 5, information inputs 6, clock input 7, information inputs 8 and outputs maximum 9 and minimum 10 devices.

The device works as follows.

The initial state of the device is determined by the order of the preparatory operation.

Register bits 3 are set to zero. There is a number in register 1. The value of the function enters the inputs 6 to the first group of inputs of the adder 2. The second group of inputs of the adder receives in the inverse code the number recorded in register 1. The input of the transfer of the lower digit of the adder receives a signal from the direct output of the second discharge of the shift register 3. V in the case of addition of the adder 2 when added, the overflow signal (transfer from the senior order of the adder) is stored in the first (lower order of the shift register 3.) After adding, the control input 7 receives a signal from which register 1 The number code is divided into a group of device outputs 8. The same signal shifts the information in shift register 3 by one bit towards the higher bits. As a result of the shift in the second bit of shift register 3, the overflow value of adder 2 is written, and in the third discharge the overflow value in the previous cycle. The analysis of these values is given in the table and allows you to judge the extremum of the function.

Table continuation

ten

spread

The inputs of cell 4 are supplied with signals from the direct output of the second discharge and from the inverse output of the third discharge of the shift register 3. Signals from the inverted output of the second discharge and from the direct output of the third discharge of the shift register 2 are fed to the inputs of the cell I 5.

Thus, after passing the control signal over bus 7 at the output 9 of the device, a signal appears in the case of a minimum and at output 10 in the case of a maximum function, and an extremum value is applied to the group of outputs 8 of the device.

Claims (1)

Invention Formula A device for determining extremums of functions containing a register and a combinational adder, the information inputs of the device connected to the first group of inputs of the combinational adder and the corresponding information inputs of the register, the inverse outputs of the bits of which are connected to the second group of inputs of the combinational adder, and the direct outputs of the register bits information outputs of the device, characterized in that, in order to expand the scope of application by determining the sign of the extremum, A shift register and two I elements are provided, the device clock input is connected to the register recording control input and the shift register shift input, the first bit information input of which is connected to the overflow output of the combinational adder, the lower order transfer input of which is connected to the first input of the first element Both and the direct output of the second bit of the shift register, the inverse output of the second bit of which is plugged into the first input of the second element I, the output of which is the output of the maximum ma devices, and a second input connected to the output of the forward third of the discharge shift register inv The third output of which the third bit is connected to the second input of the first element AND, the output of which is the output of the device minimum. about Lm ten -about