Hamilton Sundstrand Corporation

Goodrich Corporation

Gordon Elliott Winer

Shihab T A Muhammed

Shardul Shrinivas Bapat

Shihab TA Muhammed

Apparatus and associated methods relate to sequentially opening and/or closing a plurality of switches. A rotational securing assembly sequentially secures and releases a plurality of indexing members evenly distributed along a circular path centered on an axis of rotation of the rotatable disk, thereby sequentially securing and releasing the rotatable disk to and from a sequence of rotational positions. A ratcheting assembly sequentially engages a plurality of advancing members of the rotatable disk, thereby sequentially rotating the rotatable disk to a next one of the sequence of rotatable positions. A cam coupled to the rotatable disk sequentially either opens or closes a plurality of switches attached to an annular frame and distributed along a second circular path centered on the axis of rotation. Operations of the rotational securing assembly are coordinated with those of the ratcheting assembly so as to advance rotation of the rotatable disk in a stepwise fashion.

Vibration-tolerant multi-position, multi-pole continuous-rotation stepper relay

A system can include an inductance module configured to operatively connect to a solenoid. The inductance module can be configured to input an AC excitation signal to the solenoid, determine and/or compare a current-voltage (CV) phase shift between a solenoid current and solenoid voltage, and output an output signal indicative of solenoid inductance based on the CV phase shift.

Solenoid position estimation systems

A system for compensating for photodiode errors includes a live photodiode configured to be exposed to a light source and to output a live signal. The system further includes a reference photodiode located proximate to the live photodiode and configured to be isolated from the light source and to output a reference signal. The system further includes a controller configured to generate a compensated output signal by subtracting the reference signal from the live signal.

Offset compensated photodiode amplifier

Systems for power factor correction are provided. Aspects include a voltage source connected to a first node, wherein the voltage source is configured to provide a first voltage, a sense resistor connected between the first node and a second node, a load connected to the second node, a power factor correction capacitor connected in parallel with the load, and a controlled voltage source configured to provide a second voltage to the power factor correction capacitor based on a control signal, wherein the control signal is received from a power factor correction circuit configured to determine a time difference between a zero-crossing of a voltage signal and a zero-crossing of a current signal from the voltage source.

Automatic power factor correction

In accordance with at least one aspect of this disclosure, a system can include a primary coil wound around a moveable magnetic core, at least one secondary coil wound in one continuous direction and magnetically coupled with the primary coil, and a controller operatively connected to determine a position of the moveable magnetic core and configured to detect a fault across the secondary coil.

Systems and methods for fault detection in variable differential transformers

Provided are embodiments for circuit for detecting an open-wire condition for a differential input. Embodiments include a sensor, and a line replaceable unit (LRU) coupled to the sensor, wherein the LRU comprises a differential amplifier to provide a sensor output. Embodiments can also include a synchronous demodulator coupled to an output of the differential amplifier through an alternating current (AC) coupling network, wherein the synchronous demodulator is configured to receive the differential amplifier output and a reference signal at the synchronous demodulator signal input and reference input, and provide a synchronous demodulator output voltage to indicate an open-wire condition. Also provided are embodiments of a method for detecting an open-wire condition for a differential input.

Open-wire detection for analog differential inputs using an alternating current (AC) bias

A shaft monitoring system includes a rotatable shaft having a target element coupled thereto that rotates along with the shaft. A proximity sensor is located adjacent to the target element. The proximity sensor measures an inductance of the target element based on one or both of a volume of the target element and a distance between the target element and the proximity sensor, and generates a proximity sensor output signal based on the measured inductance. A signal processing system determines at least one of a position of the shaft, a rotational speed of the shaft, and a rotational direction of the shaft based on the proximity sensor output signal.

Proximity sensor to sense rotating shaft position and velocity

A voltage differential testing circuit can include a first positive line configured to connect to a positive voltage source, and a first negative line configured to connect to a negative voltage source. The circuit can include a plurality of components arranged and configured to output an output voltage when a voltage differential between a positive voltage line and a negative voltage line is within a voltage range.

Voltage differential sensing circuits

Apparatus and associated methods relate to detection of an overcurrent condition by determining if a voltage across a current-sense resistor exceeds a predetermined voltage threshold. The voltage at each side of the current-sense resistor is sensed indirectly, through a diode network. The diode networks through which the voltages on each side of the current-sense resistor are biased differently from one another. Such differently-biased diode networks translate the voltages at each side of the current-sense resistor by different amounts, the biasing of these diode networks is such that a voltage difference between the second terminals of the first and second diode networks is of a first polarity during normal current conditions, and the voltage difference between the second terminals of the first and second diode networks is of a second polarity during overcurrent conditions.

Overcurrent detection using dissimilar biasing of diode networks

Embodiments herein relate to a sensor fault measurement system. The system includes a sensor having a primary winding, a first secondary winding and a second secondary winding and a wiring harness operably connected to the primary winding, first secondary winding and second secondary winding of the sensor. The system also includes a controller operably connected to the wiring harness. The controller includes a bias network configured to apply a common mode DC voltage bias of opposite sign to the first sensor output and the second sensor output respectively, and a fault sense circuit configured to monitor the DC voltage bias on first sensor output and the DC voltage bias on second sensor output, and identify a sensor fault if at least one of the DC voltage bias on first sensor output and the DC voltage bias second sensor output is impacted beyond a selected threshold.

Growing community of inventors

Prescott, AZ, United States of America

Gordon Elliott Winer