A field of test methods, and more particularly to a method for testing a device, the method including one operating stage corresponding to a stable value of one operating setpoint for the device and/or for a test bench for testing the device. The operating stage is finalized before a maximum duration threshold if a criterion associated with a set of physical parameters picked up during the operating stage is satisfied and if a confidence level associated with the set of physical parameters reaches at least a predetermined threshold.

A method and a device for detection of initiating failures in a mechanical system. The device includes an acquisition circuit to acquire packets of endogenic and exogenic time signals corresponding to measurements of endogenic and exogenic parameters specific to the mechanical system respectively, at successive instants, and a chopping circuit to chop a passband of the endogenic signal packets into a determined set of frequency sub-bands, at each instant in the successive instants. The device further includes a calculation circuit to determine a corresponding estimating signal for each frequency sub-band at each instant in the successive instants; and a detection circuit to receive each estimating signal and the corresponding exogenic signal packets during the successive instants, and to detect any deviation in each estimating signal representing initiating failures of the machine in iso-context.

A method and a device for detection of initiating failures in a mechanical system. The device includes an acquisition circuit to acquire packets of endogenic and exogenic time signals corresponding to measurements of endogenic and exogenic parameters specific to the mechanical system respectively, at successive instants, and a chopping circuit to chop a passband of the endogenic signal packets into a determined set of frequency sub-bands, at each instant in the successive instants. The device further includes a calculation circuit to determine a corresponding estimating signal for each frequency sub-band at each instant in the successive instants; and a detection circuit to receive each estimating signal and the corresponding exogenic signal packets during the successive instants, and to detect any deviation in each estimating signal representing initiating failures of the machine in iso-context.

A system for health monitoring of a prime mover coupled to a doubly-fed induction generator is disclosed. The DFIG includes a generator having a rotor winding and a stator winding. The system includes first sensors coupled to the stator winding to generate three-phase stator current signals, and second sensors coupled to the rotor winding to generate three-phase rotor current signals. Furthermore, the system includes a signal processor operably coupled to the first sensors and the second sensors and configured to determine a torque profile of the prime mover based on the three-phase stator current signals and the three-phase rotor current signals. Moreover, the signal processor is configured to detect an anomaly associated with the prime mover if the determined torque profile is abnormal.

Method for gauging the autonomy of a system for storing and delivering gaseous ammonia to a consumer unit (3), the system comprising: a gaseous-ammonia storage cell (8) comprising a dedicated heating means (9), and at least one sensor (61, 64) of at least one parameter of the system, the method comprising steps consisting in: controlling the system on the basis of an intrusive reference datum independent of an ammonia demand from the consumer unit (3), during the control step, taking an intrusive measurement of at least one parameter of the system using the sensor (61, 64), and comparing the intrusive measurement against a threshold value of at least one parameter under the control conditions in order to estimate the autonomy of the system with respect to a filling threshold of the cell (8) that corresponds to the threshold value of the parameter.

The disclosure relates to a dual-criterion diagram for designing and assessing the life and strength of high-temperature rotating components and its establishment. In addition, the disclosure relates to a method for designing and assessing the life and strength of high-temperature rotating components based on the dual-criterion diagram for designing and assessing the life and strength of high-temperature rotating components. The advantages of the disclosure include a simple design and assessment process, high operability, and reliable assessment results. The invention is expected to be applied finally to assessment and evaluation of high-cycle fatigue life of rotating components at high temperatures.

A vehicle trailer for attaching to a vehicle and analyzing operating characteristics of the vehicle is provided. The trailer includes a frame having a tongue configured to attach to a vehicle. The trailer has its own designated powertrain configured to propel and brake the trailer independent from the vehicle. A connecting member is configured to attach to an exhaust pipe of the vehicle and includes an emissions sensor configured to detect emissions from the exhaust pipe. At least one controller is coupled to the emissions sensor and is configured to analyze the emissions. The trailer can also be attached to the vehicle via an attachment member and configured to propel the vehicle across a range of increasing speeds while a powertrain of the vehicle is in neutral, and measure forces required to propel the vehicle across the range of speeds utilizing a force gauge on the attachment member.

In order to easily and accurately measure the cogging torque of an electric motor, the present invention includes a dynamometer connected to an electric motor, a torque sensor adapted to measure the torque of the electric motor, and a cogging torque measurement motor for measuring the cogging torque of the electric motor, and is configured such that when measuring the cogging torque of the electric motor, the electric motor, the dynamometer, and the cogging torque measurement motor are connected.

In order to easily and accurately measure the cogging torque of an electric motor, the present invention includes a dynamometer connected to an electric motor, a torque sensor adapted to measure the torque of the electric motor, and a cogging torque measurement motor for measuring the cogging torque of the electric motor, and is configured such that when measuring the cogging torque of the electric motor, the electric motor, the dynamometer, and the cogging torque measurement motor are connected.

Method and apparatus are disclosed for detecting and mitigating vehicle battery gas emission into the vehicle cabin. An example vehicle includes a battery, a vent tube coupled to the battery for venting gas outside a vehicle cabin, a gas flow sensor for determining a measured flow rate at an end of the vent tube opposite the battery, and a processor. The processor is configured for determining an expected flow rate range based on a battery characteristic, and responsive to determining that the measured flow rate is outside the expected flow rate range, initiating a protective action.