Edward J Costello

US Patent:

39768694, Aug 24, 1976

Filed:

Sep 27, 1974

Appl. No.:

5/509776

Inventors:

Carl Stella - Stockholm NJ
Edward Costello - Paterson NJ

Assignee:

The Singer Company - Little Falls NJ

International Classification:

G06F 738

US Classification:

235189

Abstract:

A computing system for performing digital sequential coordinate transformations on n dimensional vector input data referenced to a sensor system and ultimate outputting of the n dimensional vector data having basis in an alternate reference system in a form compatible with utilization equipment. The system adopts the basic "Cordic Algorithm" but eliminates the need for interim storage elements by the provision in a digital computing resolver of n registers, one for each of the n orthogonal axes plus a register for the rotation angle wherein the orthogonal registers are selected sequentially by the program in pairs to develop the terminal vector solutions. Additionally, the system provides a means of cross-addition between registers which reduces register capacity and eliminates the need for circuitry to perform trigonometric subroutines.