For a narrow-beam radar working in a down-looking view, the antenna pattern modulates the ground clutter apparently in the delay/range dimension, causing amplitude/intensity distortion of radar echoes and performance ...
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In this paper, a single-phase inverter parallel operation system is designed. the system is composed of drive module, control module, single-phase inverter module and filter module. the system uses STM32f103ZET6 as th...
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the virtual synchronous machine (VSG) control is to embed the rotational inertia and damping coefficient of the synchronous generator into the inverter control, which enhances the system's anti-interference capabi...
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Compared withthe electric excitation motor, the magnetism and flux linkage of the permanent magnet of the excitation device cannot be changed after magnetization. As the motor speed increases, the back electromotive ...
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Compared withthe electric excitation motor, the magnetism and flux linkage of the permanent magnet of the excitation device cannot be changed after magnetization. As the motor speed increases, the back electromotive force of the permanent magnet synchronous motor will gradually increase. When the voltage increases When the output voltage of the inverter reaches the limit, the speed cannot continue to rise. In traditional control strategies, the magnetism of permanent magnet synchronous motors is usually kept at a high level to ensure efficient operation and good control performance of the motor. But in some cases, such as applications such as fast acceleration and variable speed, the motor needs higher acceleration and faster response speed. At this time, it is an effective means to use the flux-weakening speed expansion control strategy. In this paper, the negative direct axis compensation and Maximum Torque-per-Voltage (MTPV) flux-weakening control methods are used to realize the high-speed operation of the permanent magnet synchronous motor, and the corresponding control algorithm is verified by the hardware-in-the-loop test method.
One of the most popular methods in nonlinear control systems is sliding mode control. Despite its simplicity, speed and robustness, there is a high frequency dynamics caused by delay switching of control law, which is...
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the low-frequency oscillation phenomenon (LFO) of high-speed railway seriously affects the stability and reliability of electric multiple units (EMUs) operation. Taking CRH5 EMU as an example, this paper proposes a ne...
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Solid oxide fuel cells have great potential as a clean and efficient energy conversion method, especially for multi-stack systems in high-power scenarios. However, for a multi-stack system, the gas path connection str...
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In order to improve the robustness and power generation efficiency of photovoltaic(PV) system, a perturbation and observation(P&O) cascade Recursive Non-singular Fast Terminal Sliding Mode control(RNFTSMC) scheme ...
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the speech disordered persons will be in the position to produce hoarse speech. In this paper we focused to convert and reconstruct the hoarse speech to a normal speech by using mel frequency cepstral coefficients (MF...
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In this paper, an adaptive sliding mode control method based on immersion and invariance (ASMCI&I) is proposed for the problem of unknown internal parameters and uncertain external perturbations of the heliostat s...
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