An investigation was conducted to evaluate the effectiveness of a passive gust alleviation device (PGAD) installed in flying-wing aircraft 62.3 m wing span at large swept back angle. It performed by numerical analysis and validated wind-tunnel test 1:25 reduced scale physical model dynamic similarity full-scale aircraft. The 1- cosine with range parameters specified airworthiness regulation CS-...

We present a method for calculating the envelope surface of a parametric solid object swept along a path in three-dimensional space. The boundary surface of the solid is the combination of parametric surfaces and an implicit surface where the Jacobian of the defining function has a rank-deficiency condition. Using the rank deficiency condition, we determine a set of square sub-Jacobian determin...

We present a method for calculating the envelope of the swept surface of a solid along a path in three-dimensional space. The generator of the swept surface is a trivariate tensorproduct Bèzier solid and the path is a non-uniform rational B-spline curve. The boundary surface of the solid is the combination of parametric surfaces and an implicit surface where the determinant of the Jacobian of t...

We have explored the design and development of magnetically-resonant tag readers for application to tangible computer interfaces. To this end, we constructed a ringdown tag reader and a swept-frequency tag reader, both capable of real-time continuous interaction with multiple tagged objects. Although the ringdown reader worked well for smaller numbers of tags, the swept-frequency tag reader pro...

We present efficient and robust algorithms for intersecting a rational parametric freeform surface with a general swept surface. A swept surface is given as a one-parameter family of cross-sectional curves. By computing the intersection between a freeform surface and each cross-sectional curve in the family, we can solve the intersection problem. We propose two approaches, which are closely rel...

Terahertz radiation (THz)-based electron acceleration has the potential as a technology for driving next-generation, compact ultrafast and ultrabright x-ray sources. Dephasing is one of key problems that prevent long THz–electron interaction lengths in sub- to few-MeV range, where velocities vary significantly during high-field acceleration. Here, we present phase-shifter design with double vac...

The structural fracture of the compressor blade is main cause fatigue failure. novelty this paper creative application bent swept-back modeling to turbocharger impeller. This based on a impeller satisfying k-ε turbulence model. A simulation model was established in ANSYS software, fluid–structure interaction calculated three models before and after improvement, results were compared analyzed. o...