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This paper presents the design of double closed-loop security control structure. This structure is divided into two parts. First of all, sensor-controller-actuator loop completes the transmission of control signal output and measurement signal feedback. During the transmission process, the effects of uncertainties, perturbations, faults and attacks are coupled. Further, controller-detector loop is...
The scale factor of fiber-optic gyroscope (FOG) exhibits temperature-dependency to the ambient environment. It is essential to ensure the stability of scale factor especially for high precision FOG. In this study, the mathematical model of closed-loop FOG is established firstly and the scale factor, which is related to the temperature variation, is formulated based on the model. Then Fractional Tap-length...
In order to improve the regulation difficulty of magnetic field and voltage of permanent-magnet synchronous machine (PMSM), a novel brushless coordinate structure hybrid excitation synchronous generator (HESG) with AC excitation is proposed in this paper. The output voltage of the HESG can be regulated through the control of the amplitude and phase of the AC excitation current. The structure and operation...
This paper introduces a multi-level power quality assessment approach towards virtual testing of more electric aircraft. Three levels with increasing accuracies are rough, approximated and exact power quality assessment. The requirement to the accuracy of power quality assessment strongly depends on different analysis jobs. With the multi-level power quality assessment approach, both sufficient accuracy...
Numerical Simulation of the interaction between intracranial pressure (ICP) and cerebral blood flow (CBF) based on physiology and hemodynamics is presented. The circulation of the cerebral blood and the circulation of the cerebrospinal fluid are considered in this model. The model includes the main biomechanical factors assumed to affect intracranial pressure, particularly cerebrospinal fluid (CSF)...
The similar growth mechanism of equipment scale and single species scale was analyzed. Then, take the equipment expenditure scale as monetary measurement of equipment scale, the basic growth model of equipment expenditure scale was established on the base of Multhus model of single species growth. Next, take the equipment expenditure scale growth ratio as linear minus function, the basic model was...
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