Abstract: A system for estimating percentage torque produced by a propulsor configured for use in an electric aircraft, the system including a propulsor, the propulsor configured to generate output torque. The system including a sensor, the sensor configured to detect the output torque and generate an output torque datum. The system including a flight controller including a computing device configured to receive an output torque datum, receive an ideal propulsor model, the ideal propulsor model including at least a performance parameter, generate a model torque datum, including a model torque datum threshold, as a function of the at least a performance parameter, generate a percentage datum as a function of the output torque datum and model torque datum, and determine, at least an obstruction datum correlated to the torque percentage datum, and display torque percentage datum and the at least an obstruction datum.

Abstract: The present disclosure provides methods and systems for operating a multi-engine rotorcraft. The method comprises driving a rotor of the rotorcraft with a first engine while a second engine is de-clutched from a transmission clutch system that couples the rotor and the second engine, instructing the second engine to accelerate to a re-clutching speed, and controlling an output shaft speed of the second engine during acceleration of the second engine to the re-clutching speed by applying a damping function to a speed control loop of the second engine.

Abstract: A method and apparatus for attenuating a shockwave propagating through a first medium. The method may include the steps of detecting a shockwave-producing event, determining a direction and distance of the shockwave relative to a defended target, and interposing a second medium between the shockwave and a defended object. The second medium is different from the first medium and the shockwave is attenuated in energy as it passes through the second medium prior to reaching the defended object.

Abstract: The present invention relates to an electric device, which comprises: a micro inertial sensing module, for detecting a motion of the electric device with respect to the degree of freedom of six axes and thus issuing a sensing signal basing on the detection; a sensing signal processor, for receiving and processing the sensing signal to form a system processing signal; and a display; wherein the displacements and rotations of the motion detection-enabled electric device is sensed and measured by the micro inertial sensing module for enabling the micro inertial sensing module to generate sensing signals corresponding thereto and thus sending the same to the sensing signal processor for processing, and then the result of the processing is adopted as the input of the motion detection-enabled electric device for causing the motion detection-enabled electric device to response in the display accordingly.

Abstract: An activity measuring device (1) is used for recording the activity of a test subject, where the device (1) is attachable so as to be carried on the body of the test subject. According to the invention it is planned that the activity measuring device is located on a buckle (2) of a belt (3) which can be fitted to the body of the test subject, and that it has acceleration sensors (10, 10?) for detection of acceleration in all three spatial directions at right angles to each other. Furthermore, the activity measuring device (1) telemeters the recorded measurement data via a radio link to a central server (7), by virtue of the fact that the measurement data recorded by the activity measuring device (1) can be transmitted by means of a connecting cable (5) to a mobile telephone (4) via a device interface of the mobile telephone (4), which is arranged so as to be carried on the belt, and can be sent from there to the external server (7) via a radio link.

Abstract: A system is disclosed for determining the total torque required at the main and tail rotors of a helicopter for use in feed-forward rotor torque anticipation which includes a polynomial neural network adapted and configured to predict the aerodynamic torque at the main and tail rotors with the helicopter in motion based upon a plurality of pilot inputs and airframe inputs, a main rotor load map for determining the torque at the main rotor in hover out of ground effects based upon main rotor speed and collective stick position, a tail rotor load map for determining the torque at the tail rotor with the helicopter stationary based upon main rotor speed and pedal position, and a processor for calculating the required total torque at the main and tail rotors by summing the outputs of the polynomial neural network, and the main and tail rotor load maps.

Abstract: A diagnostic system and method for rotating machinery having mechanical problems combine AI-based interpretive reasoning with rotordynamic-based modeling and numerical optimization. A vibration response in the machinery to be diagnosed is first measured by machine sensors, and this measured response is used in a rule-based expert system to determine a probable cause of the machinery's mechanical problem. An appropriate finite element analytical model of the machinery is generated based on the probable cause. An optimizer computes the predicted response from the analytical model and compares it with the measured response. The model is automatically refined, guided by the expert system and numerical optimization, to match the predicted response with the measured response. The modifications to the model necessary to duplicate the measured response of the defective machinery are then indicative of the defects.

Abstract: A speedometer drive worm gear has at one axial end thereof an inward flange of the thickness considerably smaller than the overall thickness of the worm gear. The speedometer drive worm gear is mounted on a differential case and held axially in place by abuttingly engaging the opposed side surfaces of the inward flange with a shoulder formed in the differential case and the inner race of a differential case bearing by way of a stopper.

Abstract: A conveyor chain motion measuring device is disclosed having a double take-off drive coupled with closed-loop drives and one-way clutches so as to produce accurate measurement of the actual chain speed and travel for the entire length thereof regardless of chain link pitch variations and also maintain such precise measurement when the chain is temporarily reversed and then resumes travel in a forward direction.

Abstract: A conveyor chain motion measuring device is disclosed using a double take-off drive from the conveyor chain to produce accurate measurement of the actual chain speed and travel for the entire length thereof regardless of chain link pitch variations.

Abstract: A driving wheel for a cycle speedometer which is adapted to engage a driving belt in communication with the cycle speedometer. The driving wheel is attached to the cycle wheel or wheel block by a plurality of radially located resilient hooks.

Abstract: (a) Cycle provided with a speedometer.(b) Cycle characterized in that it comprises a clamp provided with an opening for its fixing on the axle of the wheel hub.

Abstract: An apparatus for measuring frequency of rotation of a shaft, connectable to his shaft through a reducing gear having a solenoid clutch at the output thereof, has the output shaft of this solenoid clutch associated with a driver and a return spring. The driver is adapted to rotate a memory mechanism through an actuator fast with the shaft of this mechanism. The shaft of the memory mechanism carries an indicator of the frequency of rotation of the shaft and an overrunning clutch operatively connected with a solenoid brake controlled by a pulse generator. The pulse generator is successively connectable to the solenoid clutch to perform a measurement of the frequency of rotation of the main shaft, and to the outer cage of the overrunning clutch to register the frequency of rotation of the shaft, which is being measured.