SU696476A1 - Trigonometric function computing device - Google Patents

Description

one

The invention relates to the field of computer technology and can be used in the construction of digital computers, as well as as an independent device, for example, in solving navigation problems.

The known device for calculating trongometric functions has a low calculation speed, which makes it inapplicable when solving navigation problems in real time 1.

The closest in technical essence to the proposed invention is a device containing two coordinate registers, two shifters, a control unit, two coordinate adders and an adder of the argument, a memory block whose output is connected to the first input of the adder of the argument, to the first inputs of the adders of the coordinates corresponding coordinate registers, the output of the first shifter is connected to the second input of the first adder of coordinates, and the output of the second offset is connected to the second input of the second adder of coordinates , The outputs of the first and second registers are connected to the coordinate

the first inputs of the second and first shifters, respectively 2. This device provides a faster calculation speed, but its performance is still insufficient. Firstly, the number of iterations does not depend on the value of the argument. In many cases, in particular, with small increments of the argument, not all

0 iterations are necessary. With efs, the independence of the number of iterations on the magnitude of the increment leads to a loss of speed. Secondly, after the iterations are completed, the vector module will increase, as a result of which a corresponding correction of the calculation results is required.

The purpose of the invention is to increase speed.

0

The goal of the device is achieved by the fact that a descrambler and an extrapolation unit are entered into it, to the first input of which the first output of the argument adder is connected, and

Claims (2)

5 the second input is the output of the first adder of coordinates and the first input of the first coordinate register, to the third input is the output of the second coordinate adder and the first input of the second coordinate register, to the fourth input the first output of the control unit, to the first output the second input of the first coordinate register the second output is the second input of the second coordinate register, and the third output is closed by the input of the argument adder, the third input of which is connected to the second output of the control unit, and the third inputs of the coordinate adders, the second output is from the input control unit, and the third output - to the input of the decoder, the output of which is connected to the house WMOs block memory and the second inputs of shifter. The drawing is a block diagram. ma device. The device for calculating the trigonometric functions contains a register of coordinates 1, 2, shifters 3, 4, adders of coordinates 5.6, an argument adder 7, a memory block 8, an extraction unit 9, a decoder 10, a control block 11. The device works as follows. The extrapolation block 9 stores the coordinates and the angle corresponding to a number of previous positions of the vector. The block calculates the extrapolated values of the coordinates and the angle vector that are entered in registers 1,2 and the adder 7, and the totalizer is written to with inversion of the sign. Next, the code of the new value of the argument arrives at the input of adder 7, and in the adder the difference between the real and extrapolated values of the argument is formed. The decoder 10 determines the number of the largest angular constant in this difference and outputs the corresponding signal to the shifters 3 and 4 and to the memory block 8. The signals from block 11 transfer the contents of registers 1 and 2 to the first inputs of adders 5 and 6. At the same time, the contents of registers 1, 2 are transferred to inputs of shifters 3, 4, whose outputs are connected to second inputs of summers 6 and 7. The magnitude of the shift is determined by the output busbars of the decoder 10. On the adders 5, 6, the codes are added or subtracted depending on the state of the sign bit of the adder 7, which is analyzed by block 11. The values obtained are transferred from the adders 5 and 6 to registers 1 and 2. Simultaneously those manufactured sample corner you constants from block 8 to the adder 7 where new is calculated difference value. Then, the decoder 10 determines the ns lehr angle followed by a constant, and the new coordinates and angle values are calculated. After the required number of iterations has been completed, the results of calculations from Registers 1, 2 and adder 7 are transferred to the output ycTpofljTBa and to the crapolation unit, where they participate in the calculation of the following extrapolated coordinates and angle. The use of new elements, the decoder of the extrapolation unit, allows eliminating unnecessary iterations in the processing of specified arguments, eliminating the correction of the result correction and, as a result, increasing the speed of the device. The invention is a device for calculating a trio. non-metric functions containing two coordinate registers, two shifters, a control unit, two coordinate adders and an adder of the argument, a memory block whose output is connected to the first input of the adder of the argument, the outputs of the corresponding coordinate registers are connected to the first inputs of the coordinate adders to the second input of the first the adder coordinates connected the output of the first shifter, and the second input of the second shifter is connected to the second input of the second adder coordinates, the outputs of the first and second coordinate registers are connected to the first input The second and first shifts are, respectively, about the same, so that, in order to increase it, speed, a decoder and an extrapolation unit are introduced, to the first input of which the first output of the argument adder is connected, and to the second input - the output of the first adder of coordinates and the first input of the first coordinate register; to the third input - the output of the second coordinate adder and the first input of the second coordinate register; to the fourth input - the first output of the control unit; to the first output - the second input of the first coordinate register, to the second output ode is the second input of the second coordinate register, and to the third output the second input of the argument adder, the third input of which is connected to the second output of the control unit, and the third inputs of the adders of coordinates, the second output to the input of the control unit, and the third output - to the decoder input, the output of which connected to the input of the memory unit and the second inputs of the shifters. Sources of information taken into account in the examination. 1. Mala is a universal Nairi-K computer. Technical specification ПЫ 1. 700,000. ТО, part 1У, 1970. 2. Orange A.M. High-speed device for calculating sine-cosine functions. Bulletin of BSU, Minsk, 1969, middle. 1, 3 (prototype).