Abstract: A non-contact linear position center has juxtaposed transmit and receive sections with a coupler or slider section interposed therebetween carrying a symmetrical attenuating conductive pattern. The inductive coupling of coils on the transmitter and receive sections is attenuated in accordance with the linear position of the pattern on the coupler. A unique sinusoidal signal is generated whose phase is indicative of the linear position of the coupler.

Abstract: A closed loop sensor that utilizes a piezoelectric structure. In one embodiment, drive/non-control electrodes apply drive voltages to the piezoelectric structure and drive/control electrodes apply drive/control voltages to the piezoelectric structure to cause drive mode displacement of the piezoelectric structure and cancel motion induced pickup mode and quadrature displacements of the piezoelectric structure. In another embodiment, pickup/control electrodes detect a pickup signal from the piezoelectric structure corresponding to the motion induced pickup mode and quadrature displacements and apply a control signal to the piezoelectric structure so as to cancel these displacements. In still another embodiment of the invention, an optical sensing device optically senses the motion induced pickup mode and quadrature displacements and control electrodes apply a control signal to the piezoelectric structure so as to cancel them.

Abstract: An adaptive fuzzy logic based control system for rifle stabilization uses a rifle where the barrel is freely pivoted on the stock which is held by the human being firing the rifle who may be shooting from a moving vehicle or helicopter; alternatively, the firing person may have erratic hand or body motion. During a tracking mode, when the target is being sighted in, undesired motion is sensed by position sensors to effectively lock the rifle barrel in alignment with the stock. During a stabilizing mode just before actuation of the trigger to fire the rifle, the barrel is unlocked, inertial rate sensors make the barrel relatively immune to movement of the stock to facilitate the barrel remaining sighted on the tracked target. The fire control system includes a fuzzy logic controller which by a set of inference rules provides for both alignment of the barrel with the stock during tracking and also for stabilization of the barrel just prior to firing.

Abstract: A fuzzy logic controller for a endometrium ablator heat a liquid to 85.degree. C. which is continuously circulated into the uterus to ablate the endometrium. The fluid temperature is maintained by the fuzzy logic controller which has as its inputs the temperature of the fluid and its rate of change of temperature. Associated membership functions, cold, cool, warm, hot for temperature, and negative and zero and positive for rate are respectively provided. Appropriate rules are then provided and defuzzification with the use of a singleton output function yields an output signal which controls temperature by pulse width modulation.

Abstract: A closed loop sensor that utilizes a piezoelectric structure. In one embodiment, drive/non-control electrodes apply drive voltages to the piezoelectric structure and drive/control electrodes apply drive/control voltages to the piezoelectric structure to cause drive mode displacement of the piezoelectric structure and cancel motion induced pickup mode and quadrature displacements of the piezoelectric structure. In another embodiment, pickup/control electrodes detect a pickup signal from the piezoelectric structure corresponding to the motion induced pickup mode and quadrature displacements and apply a control signal to the piezoelectric structure so as to cancel these displacements. In still another embodiment of the invention, an optical sensing device optically senses the motion induced pickup mode and quadrature displacements and control electrodes apply a control signal to the piezoelectric structure so as to cancel them.

Abstract: A mobile tracking antenna for microwave signals from a satellite or distant transmitter includes a micro- electromechanical system produced by semiconductor processing. Specifically several micro faceted reflector segments have their facets selectively controlled by a feedback control system and reflects the signal onto a four sector horn which then by error signals actuates electrostatic positioning means on the micro facets to center the signal on the optimum receiving portion of the horn. Each segment covers a portion of the 360.degree. receiving spectrum. The particular segment is selected by a maximum signal being received.

Abstract: A fuzzy logic controller for a cryogenic system in which, for example, a cold tip cooling an infrared detector uses a Stirling cycle cooler-compressor with the helium coolant maintained at typically 78.degree. K. This temperature is maintained by a fuzzy logic controller which has as its inputs the temperature differential between the desired temperature and actual cold tip temperature, rate of change of such temperature, and especially for startup the difference between a maximum voltage which can be applied to the Stirling type cooler-compressor and the actual control voltage which is applied. Appropriate membership functions for all of the inputs are provided of the triangular type. And appropriate rules related to the operation of a Stirling cycle cooler provide for fuzzy outputs which with an output membership function are defuzzified to provide a control output signal which controls the final cooling power of the cooler-compressor.