– One of the important applications of robots is in material handling and transport of various shaped objects. In cases where an object cannot be directly grasped by the robot gripper, and must be carried by a hook, it may be subject to undesirable swings during transport. This paper presents an analytical method for minimizing the oscillation of a suspended object during transport. This method...

Aims. We discuss whether the process of winding-up the magnetic field by differential rotation in a newborn quark-star can cause an energy emission rate high enough and lasting sufficiently long to explain long gamma ray bursts. Methods. Within the magneto-hydrodynamics, we study the torsional oscillations and the extraction of energy from a newborn , hot, differentially rotating quark-star. Re...

We experimentally study the phase-space distribution (PSD) of a mechanical resonator that is simultaneously coupled to two electromagnetic cavities. The first one, operating in the microwave band, is employed for inducing either cooling or self-excited oscillation (SEO), whereas the second one, operating in the optical band, is used for displacement detection. A tomography technique is employed...

The wideband oscillation of the hybrid modular multilevel converter (MMC)induced by excessive power infeed under weak ac system integration is analyzed in this article. A closed-loop state-space-based time-domain small-signal model firstly established to investigate instability problem. Different from findings two-level voltage-source-converters (VSCs) or half-bridge MMCs, root locus analysis a...

Standing wave field distributions in three classic types of graded-index antireflection coatings are studied. These graded-index antireflection coatings are designed at wavelengths from 200 nm to 1200 nm, which is the working wavelength range of high energy laser system for inertial-fusion research. The standing wave field distributions in these coatings are obtained by the numerical calculatio...

A three-dimensional study of transverse mode evolution in a free-electron laser (FEL) oscillator is presented. The total electromagnetic field circulating in the resonator is represented as a superposition of transverse modes of the cavity. Coupled-mode theory is employed to derive a generalized 3-D steady-state oscillation criterion. from which the oscillator superrnode can be found analytical...

This paper presents three novel configurations of single-phase (SP) short-stroke (SS) tubular permanent magnet oscillating machines (TPMOMs) with partitioned stator (PS), termed PS-SPSS-TPMOMs. The machine structures are described and the influence pole alignment either slot or tooth is investigated. It found that PM poles should be aligned slots in order to ease oscillation. electromagnetic pe...

The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and the Super-Kamiokande detector. Special emphasis is placed on measuring the mixing angle θ13 by observing νe appearance via the sub-dominant νμ → νe oscillation and searching for CP violation in the lepton sector. The experiment includes a sophisticated, off-axis, near detector, t...