A marine propulsor comprises: a stationary part and a movable part which is movable relative to the stationary part; and a wireless communication system, comprising at least one transmitter which is disposed in the movable part and is configured to transmit an electromagnetic data signal and at least one receiver which is disposed in the stationary part and is configured to receive the electromagnetic data signal. The wireless communication system includes a diversity scheme for mitigating multipath distortion of the electromagnetic data signal between the at least one transmitter and the at least one receiver.

A method of validating a compressive axial preload on adjacent rotatable elements serially arranged around a shaft, created through application of a progressively increasing axial tension to a tensioning member configured to compress the elements when the axial tension is applied. The method includes monitoring a load in the tensioning member and/or in one or more of the elements, and an elongation of the tensioning member, during application of the axial tension, determining at least one validation parameter from the load and the elongation, comparing each validation parameter with a respective predetermined range therefor; and if at least one of the at least one validation parameter is out of the respective predetermined range, correcting the preload on the elements, and repeating the method. A method of applying the compressive preload and a system for validating the compressive preload are also described.

An embodiment of a method of performing an energy industry operation includes: collecting historical data relating to one or more previously performed operations having a characteristic common to both the one or more previously performed operations and a proposed operation; planning the proposed operation based on the historical data, the proposed operation associated with one or more operational parameters; performing the proposed operation; measuring a condition during performance of the proposed operation and comparing the measured condition to the historical data; and automatically adjusting the one or more operational parameters based on the comparison.

A system and method of detecting fueling imbalance(s) in an internal combustion engine is provided. The method includes receiving data regarding an oxygen content of engine exhaust for the engine operating at a cycle rate. Frequency component analysis is performed comprising a filtering operation on the received oxygen content data. The filtering is done at the cycle rate of the engine or harmonics thereof to obtain filtered oxygen content data. Then, the method/system determines at least one of: 1) one or more angles of the engine at which the filtered oxygen content data exhibits a first amplitude value characteristic relative to amplitude values at other angles; and 2) a shape of the filtered oxygen content data obtained by sampling at pre-defined engine angles. The method/system then identifies a cylinder experiencing a fueling imbalance responsive to the determined at least one of one or more angle(s) and shape of the data.

A system and method of detecting fueling imbalance(s) in an internal combustion engine is provided. The method includes receiving data regarding an oxygen content of engine exhaust for the engine operating at a cycle rate. Frequency component analysis is performed comprising a filtering operation on the received oxygen content data. The filtering is done at the cycle rate of the engine or harmonics thereof to obtain filtered oxygen content data. Then, the method/system determines at least one of: 1) one or more angles of the engine at which the filtered oxygen content data exhibits a first amplitude value characteristic relative to amplitude values at other angles; and 2) a shape of the filtered oxygen content data obtained by sampling at pre-defined engine angles. The method/system then identifies a cylinder experiencing a fueling imbalance responsive to the determined at least one of one or more angle(s) and shape of the data.

A method for testing a hybrid power plant equipping a rotary-wing aircraft comprising at least one lift rotor, the hybrid power plant being configured to rotate the at least one lift rotor, the hybrid power plant comprising at least one heat engine configured to rotate the at least one lift rotor; and at least one electric motor supplied with electrical energy by at least one electrical power source, the at least one electric motor being configured to rotate the at least one lift rotor at least when at least one of the at least one heat engine fails.

In one aspect, a method for detecting and diagnosing a coolant leak of an engine may include diagnosing a coolant leak of the engine based on a low frequency pressure response of a measured engine coolant pressure. In another aspect, an engine system (e.g., for a vehicle) includes an engine and a coolant system operatively connected to the engine. The coolant system includes a coolant reserve and a coolant pump between the engine and the coolant reserve. The engine system also includes a coolant pressure sensor to measure coolant pressure, and a controller configured to measure an engine coolant pressure and diagnose a coolant leak of the coolant system based on a low frequency pressure response of the measured engine coolant pressure.

An adjustable tool configured to facilitate mounting an electromechanical device relative to a tester is contemplated. The adjustable tool may be operable to facilitate adjustably mounting a belt tensioner, pulley or other rotating element of the electromechanical device relative to a belt drive or other rotatable testing element included on the tester in a manner sufficient to enable adjusting tensioning and/or positioning therebetween.

A method and device for monitoring a fault of a wind power generator set. The method includes the following steps: performing (101) fault identification on a component in a wind power generator set; and presenting (102) an identified fault using a three-dimensional model of the component. The device includes corresponding identifying module (61) and presenting module (62). By using the method and device, the fault monitor can intuitively observe the fault existed in the component, which not only is beneficial for taking effective fault processing measures before a minor fault evolves into a serious fault and thus reduces the harm of the fault, but also reduces the experience requirements for the fault monitor and avoids the process that the fault monitor in the prior art analyzes a two-dimensional curve to identify whether there is a fault in the component according to his experience.

In a process for testing the powertrain of vehicles that are at least in part electrically driven, the voltage supplied to the powertrain is controlled by a controller coupled with a simulation system for the energy storage system in a way that the voltage acts dynamically as for a real energy storage system. The controller is designed with a model based controller design method, with a load model of the powertrain being used in the model of the controlled system.