Vectorsyn Force Generators for Three Axes Acceleration Measurement

This paper discusses the design and test results of a proposed electromagnetic component, to be named the Vectorsyn, which provides an improved means of mass element restraint and support for a three axes acceleration measurement system. The principle of operation of the Vectorsyn and a functional block diagram for a three axes acceleration measurement system are given. An expression is derived for the first-order perturbation in the output force of the Vectorsyn, which becomes zero under an ideal operating point. However, realizability of the desired operating point is determined by the relative magnitude of various physical parameters, such as the ratio of coil inductive reactance to effective resistance. The relationship between various parameters gives a bounded region. For physical realizability of the desired operating point, certain parameters must fall within this region. The experimental procedure is briefly explained and typical test results are given. The data indicate that the perturbation forces are less than the order of 1 part per 106 per microinch of displacement of the mass element. The test data support the conclusion that Vectorsyn force generators potentially are suitable for providing the means of mass element restraint and support for a three axes acceleration measurement system.