84results about How to "Avoid catastrophic failure" patented technology

In various embodiments, a device is provided comprising a balloon configured to expand to an expanded state in response to introduction of a fluid at a first pressure, wherein the fluid perfuses through the balloon above a second pressure, the second pressure being the same or greater than the first pressure. In various embodiments, a method comprising fabricating a balloon configured to expand to an expanded state in response to introduction of a fluid at a first pressure, wherein the fluid perfuses through the balloon above a second pressure, the second pressure being at or greater than the first pressure, disposing the balloon on an elongate member having a lumen, placing the lumen in fluid communication with an interior volume of the balloon.

A method and apparatus are disclosed for predicting the service life of a metallic structure subjected to cyclic loading. Such structures experience fatigue, which can lead to failure after a number of loading cycles. The disclosed invention allows for an accurate prediction of the number of cycles to failure for a metallic structure by observing the slope of the rise in surface temperature of the structure after the cyclic loading has begun. The method of this invention provides early and accurate predictions of service life and does not require destructive testing. The method and apparatus of the present invention may be installed on working equipment, thus providing service life predictions for materials in real world use. The invention uses an empirically derived relationship that was confirmed using analytical relationships and material properties. The derived formula uses two constants that may be determined empirically using a disclosed process. The constants also may be estimated mathematically. The apparatus may include a wireless temperature sensor mounted on the metallic structure of interest and a data analysis unit to perform the needed calculations.

Methods and apparatus are described to detect, measure, and determine the presence of unknown Groundloop currents flowing through unidentified circuit pathways within the wiring system distributed within a portion of a fuselage of an airplane substantially made from fiber-reinforced composite materials to avoid catastrophic failures of the electrical system within such an airplane.

The invention relates to a fault identification method for inter-turn short circuit of stator windings in doubly-fed motor at sea. The method comprises the following steps of: obtaining three-phase voltage and three-phase current of the stator of the doubly-fed motor whose fault has yet to be recognized; calculating the three-phase voltage and three-phase current of the stator through a modified Park's vector method to obtain the 2 times fundamental frequency component amplitude I2p caused by the inter-turn short circuit fault of the stator windings; and determining whether the 2 times fundamental frequency component amplitude I2p caused by the inter-turn short circuit fault of the stator windings reaches the fault pre-warning value or not. If so, the doubly-fed motor whose fault has yet to be recognized at sea is confirmed to have an inter-turn short circuit fault. Compared with the prior art, the identification method of the invention has robustness to the motor stator voltage imbalance and load variation, and the discrimination is both accurate and strong.

A circuit is disclosed for determining which of a multiplicity of LED strings in an illumination system has a fault. A group of circuits determines the maximum, minimum, midpoint between maximum and minimum, and average voltage of the group of LED string voltages in use, and examines the statistical properties of the LED string voltages. Comparators are used to find the strings which have the highest and lowest operating voltages, and to compare the midpoint and average voltages to determine whether the highest or lowest voltage string is responsible for causing a fault in the illumination system operation. Memory means are used to keep the said determined string turned off to prevent faulty operation.

An apparatus may be configured to provide electrical power while incorporated in an armored garment. The apparatus may include a plate having a footprint that corresponds to a plate of body armor, a plurality of energy storage cells carried by the power plate, and a port carried by the plate. The port may be configured to output power stored in the plurality of energy storage cells from the apparatus. The apparatus may also include one or more processors configured to enhance functionalities of the apparatus.

A pump system for movement of fluids having a reciprocating piston power pump having at least three reciprocating pistons operable to displace fluid from a housing having a pumping chamber, an integrally forged crankshaft operably connected to the pistons, at least one sensor operable to sense ambient conditions on the pump, and a computer control for processing data from the sensor to regulate the operation of the pump in response to the data. The system also utilizes protective infused treatments for lubricity and enhanced lubrication sprayers and a reset relief valve and pressure sensors operably connected to the computer system for control and monitoring of the pump.

The invention relates to an ocean platform multi-stage task system reliability estimation method based on data drive. The estimation method mainly includes the steps that a multi-stage task process model is established, and a probability density function of task time is estimated; a system degenerative process model is established, and the residual life is estimated; according to the reliability definition of the multi-stage task process model and the system degenerative model, system reliability parameter values are obtained through real-time calculation through the task time estimated value and the system service life estimated value. Through measured sensor data, the relation between historical data of an individual multi-stage task system and current real-time data information is established, reliability parameters of the multi-stage task system under the dynamic condition are accurately estimated in real time, and the problem that an existing method is only suitable for static hypothesis and a specific system is solved. The reliability parameters of the ocean platform multi-stage task system are accurately estimated in real time, the system is effectively maintained in real time, the maintenance cost of the system is reduced, and catastrophic faults are effectively avoided.

A safety cable system for a fitness device including a resistance load and a user interface device. A redundant cable apparatus connects the resistance load to the user interface device for lifting the resistance load by a force applied to the user interface device. The redundant cable apparatus comprises two cables extending in redundant cable paths between the resistance load and the user interface device. The two cables can share the resistance load or one of the cables can be dormant until failure of the other cable.

The invention discloses an underwater towed vehicle automatic detaching apparatus comprising a towing hawser, a bearing joint, a joint pin, an universal connector, a protecting cable, a shackle pin, a shackle body, and a fracture pin. The towing hawser is connected to the underwater towed vehicle through the bearing joint. The bearing joint is connected to an ear plate I of the universal connector through the joint pin and a nut. One end of the protecting cable is connected to an ear plate II of the universal connector, and the other end of the protecting cable is arranged on the shackle body. The shackle pin sequentially penetrates through an aperture on the right side of the shackle body, a through hole used for protecting a cable pedestal, and a threaded hole on the left side of the shackle body. A top boss of the shackle pin is arranged in a shackle body recess. Bottom screw thread of the shackle pin is connected with the threaded hole of the shackle body. The fracture pin penetrates through a spherical hinge opening of the universal connector and a towing hole of a towing support of the underwater towed vehicle, and is fixed by using a fracture pin nut. The apparatus is arranged on a towed vehicle. When the load on the towing hawser exceeds a preset value, the automatic detaching apparatus can be reliably fractured, such that the underwater towed vehicle can be safely detached, and a disastrous failure can be prevented from occurring.

The invention relates to an internal pressure compensation device for an oil-impregnated paper insulating sleeve, which is particularly suitable for internal pressure compensation for oil-SF6 or oil-oil sleeve which is hardly observed by using an oil meter. The internal pressure compensation device comprises a substrate, a compensation device shell and an oil cavity formed in the compensation device shell, and is characterized in that: a freely telescopic corrugated expansion tube bank of which the tubes are arranged in parallel is arranged in the compensation device; and the oil cavity is positioned outside the corrugated expansion tube bank, and is communicated with insulating oil in the insulating sleeve through an oil-way connecting tube. The internal pressure compensation device has the advantages that: a pressure indicating gauge communicated with an alarm system is arranged, so when the oil level or oil pressure exceeds a set limit under the condition that the oil level of the sleeve cannot be observed, the device can indicate to alarm to prevent a phenomenon that the oil level in the insulting sleeve is too low and the pressure is abnormal to cause failure; and by arranging the freely telescopic expansion tube bank, the insulating oil in the insulating sleeve is subjected to volume compensation, the insulating oil is not contacted with the air, and the performance of the insulation oil is prevented from being reduced due to the air.