Abstract: An inertial measurement unit which provides three axis acceleration and angular turning rate detection with a cubical magnetically suspended sensor mass disposed within a cubical outer assembly. The sensor mass is free to move mechanically independent from the outer assembly. The sensor mass has a plurality of sensing and suspension elements of particular orientation on a selected plane for each axis of detection which face a corresponding set of sensing and suspension elements respectively on interior surfaces of said outer assembly. The sensing elements are advantageously cross-coupled to minimize cross-axis sensitivity. The invention utilizes several servo-control loops of conventional design to process outputs from the pickoffs and maintain the sensor mass in proper orientation.

Abstract: The plane of the leads of a field effect transistor are spaced from a transistor housing surface a distance which may have any value in a given range. The leads are soldered or welded to respective planar conductors of a microwave circuit and the housing is soldered to a heat sink pedestal on a base. The microwave circuit is fixedly secured to the base at one end and adjustably secured to the pedestal at the other end to compensate for the variations in the spacing between the plane of the leads and the housing at that other end.