SU572799A1 - Device for converting rectangular coordinates into spherical ones - Google Patents

Description

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The invention relates to the field of analog computing and can be used in navigation computing devices.

Known devices of similar designation. One of them, based on the summation of quadrature harmonic voltages modulated by the signals of the sources of rectangular coordinates, converts them into n-polar ones 1. Its disadvantage is limited functionality (only the plane coordinate transformation problem is solved).

The closest in technical essence to the present invention is a device for converting rectangular coordinates into spherical, containing a quadrature harmonic voltage generator, the outputs of which are connected to the first inputs of the first and second modulators. The second inputs of the modulators are connected to the sources of the first and second the rectangular coordinates, and the outputs of the modulators are connected to the first adder, as well as the third modulator. One of the inputs of the latter is connected to the source of the third rectangular coordinate, and the output is connected to one of the inputs of the second adder, the other input of which is connected to the output of the First adder. The output of the second adder is connected to the input of the block

definitions of a vector module. In addition, the device contains blocks for determining longitude and polar distance 2. The disadvantage of this device is the relative complexity of the functional circuit.

The purpose of the invention is to simplify the functional scheme of the device and to improve the accuracy-achieved by the fact that another input

the third modulator is connected via the additionally inserted phase shifter to the output of the first adder, the output of the phase shifter is connected to one of the inputs of the polar distance determination unit, the other input of the polar distance determination unit is connected to the output of the second adder, one of the inputs of the longitude determination unit is connected with the first output of a quadrature harmonic voltage generator, another input block

determination of longitude - with the release of the first adder. The longitude determining unit and the polar distance determining unit each comprise two square pulse drivers connected to the block inputs,

and the outputs of the drivers are connected to the corresponding inputs of the trigger, to the output of which a smoothing filter is connected. The block diagram of the device shown in the drawing.

The device comprises a quadrature harmonic voltage generator 1, modulators 2, 3, 4, adders 5, 6, a phase shifter 7, a block 8 for determining a vector module, a block 9 for determining longitude, a block 10 for determining the polar distance.

The longitude determination unit contains shapers 11, 12 rectangular pulses, trigger 13 and a smoothing filter 14, a block for determining the polar distance — shapers 15, 16 rectangular pulses, trigger 17 and a smoothing filter 18.

The device works as follows.

With the help of modulators 2 and 3 and adder 5, a harmonic voltage is generated, which is a projection of the vector on the XY plane. In block 9, the phase of the specified harmonic voltage is determined, which is the longitude f in the spherical coordinate system. At the output of the modulator 4, a harmonic voltage is generated corresponding to the third rectangular coordinate Z of the vector. Block 8 fixes the amplitude of the total voltage, which corresponds to the modulus R of the vector. The phase difference between the total oscillation coming from the output of the adder 6 and the voltage taken from the output of the phase shifter 7 (shifting by 90 °), determined in block 10, is the value of the polar distance 6.

The angles φ and δ, determined in blocks 9 and 10, are proportional to the average values of the voltages allocated by the filters 14 and 18.

Claims (2)

1. A device for converting rectangular coordinates into spherical, comprising a quadrature harmonic voltage generator, the outputs of which are connected to the first inputs of the first and second modulators, the second inputs of the modulators being connected to the sources of the first and second rectangular coordinates respectively, and the outputs of the module tori are connected to the first adder, the third modulator, one of the inputs of which is connected to the source of the third rectangular coordinate, and the output connected to one of the inputs of the second adder, the other input which is connected with the output of the first adder, while the output of the second adder is connected to the input of the module determining module of the vector, as well as blocks for determining the longitude and polar distance, characterized in that, in order to simplify the circuit and increase its accuracy, another input of the third the modulator is connected through the additionally introduced phase shifter to the output of the first adder, the output of the phase shifter is connected to one of the inputs of the polar distance determination unit, the other input of the polar distance determination unit is connected to the output second summer house, one of the inputs of determining longitude unit connected to the first output of the generator of quadrature harmonic voltages, determining other input longitude block - with output of the first adder. 2. A device according to claim 1, characterized in that the longitude determining unit and the unit the polar distance determinations contain two rectangular pulse drivers connected to the block inputs, the outputs of the drivers are connected to the corresponding trigger inputs, to the output of which A smoothing filter is connected. Sources of information taken into account during the examination 1. USSR author's certificate No. 437093, cl. G 06G 7/22, 1973. 2. For France of France No. 2180577, cl. G 06G 7/00, published 1974.