LITTON SYSTEMS INC WOODLAND HILLS CA GUIDANCE AND CONTROL SYSTEMS DIV
A miniature, pancake-style resolver was developed which employs the principle of measuring the capacitance between a plane parallel electrode structure. One-half contains a pattern structure electrically excited by a 100 KHz voltage the other consists of a pickup structure whose output signals are sine and cosine functions of the angular displacement of the two elements. This entire assembly, and its signal processing electronics, is 0.9 inch in diameter and 0.13 inches thick. Its accuracy is at least arc-minutes. Theoretical discussion includes pattern and pickup element design. Experimental discussion includes the computer-generation of patterns and pickup geometries, the fabrication of the elements using the thin-film techniques of the semiconductor industry, and construction of an electronics package using hybrid miscrocircuits. A special mechanical test fixture was developed which allowed the deliberate introduction of positional errors to evaluate their effects on accuracy. Preliminary work on a 1.5 inch diameter model is also given.