SU1103248A1 - Device for calculating values of angles - Google Patents

Abstract

A device for calculating angles, containing sine and cosine angle sensors and an approximate angle calculation unit, distinguishing from the fact that, in order to improve accuracy, the device contains first and second, switches, adder and comparator, while the outputs of the sine and cosine angle sensors through The first switch is connected to the first and second inputs of an approximate angle calculation unit, the output of which is connected to the first al inputs of the second switch and adder, the second input of which is connected to the bus of the first reference voltage and the output is the second input of the second switch, whose output is the output device, the output angle datchika.sinusa connected to the first input of the comparator, the bus of the second reference voltage is connected to the second input of the comparator, the comparator output is connected to the gate g vho- rows of switches. (L

Description

This invention relates to computer analogs. . A computational device for determining angles, operating from sine and cosine of angle 13 sensors, is known. The device is based on calculating the sine of an angle four times smaller than the measured one. In the linear zone, when sinp J is inversely recalculated to the measured angle, it is performed using a scaling element. The drawback of the device is its low accuracy and complex structure. The error in determining the angle increases with an increase in the measured angle. second and third scaling elements; a multiplication unit and a cubic root extraction unit; the first input of the approximate angle calculation unit through the first scaling element. connected to the first input of the adder; the second input of the approximate angle calculator is connected to the first input of the multiplication unit, the output of which is connected to the second input of the adder, the output of which is connected via the second scaling element to the input of the cubic root extraction unit; to the second input of the multiplication unit, the input of the third scaling element, the output of which is connected to the third input of the adder.

Such a device is characterized by an increased accuracy in determining the angle while simplifying the structure. The accuracy in determining the angle is achieved by the structural realization of an approximate formula obtained by decomposing the sine and cosine functions in the Maclaurin series.

However, with an increase in the measured angle of 50, the error of the device increases.

The aim of the invention is to improve the accuracy.55

The goal is achieved by the fact that a device for calculating angles containing sine and cosine sensors of angle and block

Sinoi cos (, C05ot, 5in (- | --od |,

This achieves a reduction in the error of the approximate calculations.

Depending on the ratio of the sine of the measured angle and the threshold of operation of the comparator 6 set to equal, the switch 4 connects the sine sensors 1 and cosine 2 to the block 3 in forward or reverse order, and the switch 5 connects the output signal of the block 3 to the output or the signal from the output of the adder 7. approximate calculation of angles, contains the first and second switches, the adder and comparator, while the outputs of the sine and cosine sensors through the first switch are connected to the first and second inputs of the block for the approximate calculation of angles, the output first connected to the first inputs of the second switch and adder, the second input of which is connected to the bus of the first reference voltage, and the output to the second input of the second switch, the output of which is output by the device, the output of the sine sensor is connected to the first input of the comparator, the second reference voltage connected to the second input of the comparator, the output of the comparator is connected to the control inputs of the switches. The drawing shows a diagram of the device. The device contains sensors of sine 1 and cosine of angle .2, block 3 — approximate calculation of angles, switches 4 and 5, comparator 6, adder 7. The execution of block 3 may be different; Various technical solutions are known that make the transition from the sine and cosine functions of the angle to the angle. Block 3 contains scaling blocks 8-10, multiplication block 11, adder 12, and root collector 13. Positions 14 and 15 denote the device voltage buses. The device works as follows. The device implements the calculation of the angle of the first octant from the sine and cosine values of the calculated angle, and when switching from one to the second octant, the device operates with additional angles

3. 11032484

Purpose of the adder 7 - transition The proposed device possesses, from the calculated additional angle, the accuracy at a low direct. .1 instrumental costs.

Claims (1)

A DEVICE FOR CALCULATING ANGLES, containing sine and cosine angle sensors and an approximate angle calculation unit, which, in order to increase accuracy, contains first and second switches, an adder and a comparator, while the outputs of the sine and cosine of the angle through the first switch is connected to the first and second inputs of the block approximate calculation of angles, the output of which is connected to the first inputs of the second switch and the adder, the second input of which is connected to the bus of the first reference voltage, and the output to the second th input of the second switch, whose output is an output device datchika.sinusa angle output is connected to the first input of the comparator, the bus of the second reference voltage is connected to the second input of the comparator, comparator output is connected to the control switch rows. >