Inerter is a novel type of mechanical element. As the important composition vibration control systems, inerters are widely used. Meanwhile, operation security issue inerter becoming increasingly prominent. Dynamic-breakdown (DBoI) means that inerter’s two terminals come into contact, which can cause huge impact force and destroy system. The ball-screw an essential protype inerters. existence dy...

This paper presents the modeling of Permanent Magnet Synchronous Motor and its application with Vector Control technique under different operating condition such shaping, cutting, grinding or shearing require constant torque, irrespective of speed. Other application in cranes and conveyors handling constant weight of material per unit time, in pumps, screw conveyors, compressors and ball mills,...

This paper introduces a mechatronic network and applies it to vehicle suspensions for performance optimization. The mechatronic network consists of a ball-screw and permanent magnet electric machinery (PMEM), such that the system impedance is a combination of mechanical and electrical impedances. We then apply the network to vehicle suspensions, and demonstrate the performance benefits and thei...

An internal kink instability is observed to grow and saturate in a line-tied screw pinch plasma. Detailed measurements show that an ideal, line-tied kink mode begins growing when the safety factor q = (4pi2r2B(z))/(mu0I(p)(r)L) drops below 1 inside the plasma; the saturated state corresponds to a rotating helical equilibrium. In addition to the ideal mode, reconnection events are observed to pe...

We consider the helical reduction of the wave equation with an arbitrary source on (n+1)-dimensional Minkowski space, n ≥ 2. The reduced equation is of mixed elliptic-hyperbolic type on Rn. We obtain a uniqueness theorem for solutions on a domain consisting of an n-dimensional ball B centered on the reduction of the axis of helical symmetry and satisfying ingoing or outgoing Sommerfeld conditio...

The structure of fibers of polyadenylic acid at acid pH has been studied by S-ray diffraction. A model is proposed consisting of two parallel intertwined helical chains, each having a screw of 3.8 .k and 45 " and related to each other by a +-ad asis parallel to the fiber axis. Coordinates, bond distances and angles and the calculated Fourier transform are given for this model. Reasons are given...

This paper presents a detailed manufacturing model that can be used for grinding a ball-end mill using 5-axis CNC (computer numerical controlled) grinding machine. The profile of the helical groove can be calculated exactly using the given wheel profile and relative movements between the workpiece and the grinding wheel. The proposed model is related to some analytical, differential geometry an...