457 results about "Test article" patented technology
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A test article is a version of space craft or related vehicle or equipment, built as a platform to perform testing. Test articles are built to the same specifications to replicate conditions and behaviors of flight ready versions. Test article version are also built without the certification and quality control steps taken with the versions intended for flight. Test articles are more complete than a boilerplate. Test articles can sometimes be upgraded to flight ready status. Of the 136 Space Shuttle external fuel tanks produced, one was retained as a test article. The contractor producing the tanks commented that that tank could be refurbished for flight use if necessary. The static test article for the Dream Chaser lifting-body spaceplane "will become the atmospheric flight test vehicle in 2012 for drop tests." Test articles are often displayed in museums because of their accuracy. Museums may refurbish test articles to match more modern configurations.
A monitoring system for monitoring a test article includes a scanning system and a computer system. The test article may be positioned within a fluid tunnel. The scanning system may be configured to scan the test article and record positional data of at least one point on an article surface of the test article. The computer system is in communication with the scanning system for receiving the positional data and being operative to determine at least one of the following: a position of the test article, an attitude of the test article, and deformation of the article surface.
A thermoplastic composition is disclosed, comprising: a polymer component comprising a polyestercarbonate copolymer comprising ester units and carbonate units; a polycarbonatecopolymer comprising branched carbonate units and carbonate units; and 0.01 to 10 wt. %, based on the total weight of the polymer component, of a polymeric compound comprising at least two epoxy groups, wherein the polymeric compound has a weight average molecular weight of 1,500 to 18,000; wherein a test article having a thickness of 3.2 mm and molded from the thermoplastic composition retains more ductility after aging at 134° C. and 100% humidity for 48 hours than an article having a thickness of 3.2 mm and molded from the same thermoplastic composition without the polymeric compound comprising at least two epoxy groups, each measured in accordance with ASTM D3763-02.
A stereoscopic three-dimensional optical metrologysystem and method accurately measure the location of physical features on a test article in a manner that is fast and robust to surface contour discontinuities. Disclosed embodiments may image a test article from two or more perspectives through a substantially transparent fiducial plate bearing a fiducial marking; camera viewing angles and apparent relative distances between a feature on a test article and one or more fiducials may enable accurate calculation of feature position.
The invention discloses a fiber reinforced polyurethane modified polyisocyanuratecomposite material and a preparation method thereof. It is characterized in that it is composed of a fiber mat and a polyisocyanate-containing polyurethane composition poured on the fiber mat, foamed and cured. Among the components of the polyurethane composition, The weight of the polyurethane composite material includes 75%-96% of combined polyalcohol and 1%-3% of foaming agent. The invention adopts polyol as the main raw material and water as the foaming agent, so that the composite material has good fluidity while having excellent characteristics, and can be demolded quickly; the molecular hydroxyl number is between 2 and 4, Polyols with a hydroxyl value between 300 and 700 can reduce the viscosity of the composite material and improve fluidity. The use of small molecular polyols can reduce the viscosity of the composite material, improve fluidity, and increase the initial strength of the product, which can be quickly released from the mold. .
The invention relates to a method for measuring the electric capacity and the dielectric loss of a capacitance type voltagetransformer, comprising the following steps of: disassembling primary and secondary lead wires of a tested article, and connecting a secondary winding of the tested article to the ground in a short circuit way by a fuse wire; disassembling a lower-voltage terminal X point ofa compensation reactor of the tested article and an end shield to connect to the ground, wherein the end shield and the X point are both suspended in midair; connecting a measuring ground point of a full-automatic digital electrical bridge AI-6000 E to the ground; connecting a high-voltage line and a measuring line to the full-automatic digital electrical bridge AI-6000 E; switching on a main power switch, then switching on an inner high-voltage permitting switch, selecting positive connection wire, inner standard, frequency conversion and testing voltage 10 kV, and finally pressing a starting / pausing key to carry out measurement for more than 1 second; and after the measurement is finished, pressing an up arrow key and a down arrow key to look up data. The invention can effectively reduce measurement errors and is beneficial to objectively and accurately analyzing and evaluating the insulating conditions of equipment.