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The output performance of residence times difference (RTD) fluxgate may vary under different driving conditions (driving currents and frequencies) and core materials. To optimize the RTD fluxgate and simplify its design process, an analytical model is employed to select the parameters and identify the effective factors that dominate the performance. The dynamic permeability parameters (Pi), which...
The method of three-phase PV inverter has the deficiency such as wave distortion and long adjustment time. Aimed at this situation, we propose a modified fuzzy PID control strategy. According to the characteristics of the running, we devise a modified fuzzy PID controller parameter setting principle, which add the power coefficient to Fuzzy Inference Engine with the error and error rate, to make the...
This paper proposes a lower limbs gait rehabilitation machine which is used to help the patients to recover walking ability of lower limbs. The machine includes left leg gait training mechanism and right leg gait training mechanism, and each mechanism consists of a four-bar mechanism with one degrees of freedom and a foot plate. Since the crank of the four-bar mechanism on the both sides is driven...
Synthetic aperture radar has been used widely since it can provide high-resolution images. Many imaging methods have been proposed based on Fresnel approximation. These imaging methods are not applicable when synthetic aperture radar works at near field because the Fresnel approximation is completely wrong. Time domain correlation is a kind of digital reconstruction in spatial domain via Fourier transform...
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