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Variable pump driving variable motor (VPDVM) is an essentially nonlinear system with dual-input single-output and coupling. Regular control algorithms are difficult to achieve approving control effects on this kind of system. In this paper, the sliding mode genetic control algorithm is proposed for VPDVM. The algorithm mainly aims at solving problems of nonlinearity and unable-decoupling of VPDVM...
It has been discovered that laminate composites of longitudinally magnetized magnetostrictive and transversely poled piezoelectric layers have a giant magneto-electric effect under a low bias magnetic field. The maximum induced magnetoelectric coupling coefficient at resonance is 3.66 V/(cm×Oe), which is over 11 times higher than magnetoelectric coupling coefficient at sub-resonance frequency. The...
A “capacitive-piezo” transducer that separates a piezoelectric resonator from its electrodes via small gaps to eliminate resonator-to-electrode loss while maintaining strong electromechanical coupling, has enabled demonstration of a 50-MHz wine-glass disk (WGD) resonator array with Q=12,748. This is higher than exhibited by any sputtered thin-film AlN resonator measured to date at any frequency and...
Quality factors (Q's) greater than 10,000 and higher than reported for any other sputtered AlN d31-piezoelectric micromechanical resonator have been demonstrated for the first time using an energy sharing mechanical circuit that mechanically couples two electrode-equipped AlN resonators with several electrode-less ones. The key enablers behind the described Q increase are 1) removal of metal electrodes...
This paper presents an ontology for emergency event model based on decision support (DSE2M). The model is recommended as a means to solve problems of how to describe basic characteristics of each phase in an emergency, and decide to take corresponding actions to deal with it according to the characteristics. To obtain satisfactory solutions and detailed actions, DSE2M is stratified into five levels:...
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