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People hope to use a small number of loudspeakers to get the experience of the film 3D sound at home. Considering that people use two ears to listen, this paper provides a method which reproduce the sound field within the region of two ears. We develop the fundamental performance limits for the truncated spherical harmonic function expansions of the sound field within the region of ears. Based on...
The advanced features of three-phase PWM voltage-source converter are not necessarily achieved under unbalanced input voltage conditions due to the generation of even-order harmonics at dc output and the odd-order harmonics in input currents. Both the 2nd harmonic voltage component onto the dc link and the negative sequence part of the input currents can disturb the performance of the attached inverter...
In this paper, we consider the tracking control problem under input constraints for robot manipulators which are affected by unmeasurable harmonic disturbances. A new control scheme is proposed for the problem, which composed of a parameter-dependent nonlinear observer and a tracking controller. The parameter-dependent nonlinear observer designed by the internal model principle, can achieve a estimation...
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