Coordinate converter

Details Coordinate converter Coordinate converter

1976-04-02

1977-09-06

Ruggiero, Joseph F.

Registers

Transfer mechanism

Traveling pawl

89 41EA, 235 615S, 235 615E, G06G 722, G06G 780

Patent

active

040470148

ABSTRACT:
An electronically controlled coordinate converter for transforming vectors from a first coordinate system to a second coordinate system through an input angle is provided using a harmonic oscillator which is responsive to an oscillation angle control signal having a discontinuity or transition point wherein an incremental change in the input angle at a predetermined value causes a step function in the duration of said oscillation angle control signal. The discontinuity in the oscillation angle control signal is eliminated by control circuits within a selected range of input angles where the error effects due to transformations on either side of the discontinuity are avoided. Another feature of the invention is that the discontinuity in the oscillation angle control signal may be shifted away from or in response to a previous vector transformation having an input angle close to the discontinuity to avoid recurrent vector transformations on either side of the oscillation angle control signal discontinuity due to slight incremental fluctuations in the input angle.

REFERENCES:
patent: 2995302 (1961-08-01), Ingwerson et al.
patent: 3371199 (1968-02-01), Schwartzenberg et al.
patent: 3415157 (1968-12-01), Marchisio et al.
patent: 3803387 (1974-04-01), Lackowski
patent: 3829659 (1974-08-01), Margolis

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