This paper proposes an extended reference current calculation method for the PV based three-level neutral point clamped (NPC) shunt active power filter (SAPF). Shunt active power filter demands a source of energy for compensating the current based distortions, which utilizes the photovoltaic array with DC-DC boost converter as a source of DC power. The shunt connected inverter controls the DC l...

Abstract: Compared with the state estimation of quadruped robots based on external sensors such as camera and lidar, body can provide high-frequency stable odometer estimation. By analyzing methods legged robot sensor, invariant extended Kalman filter (IEKF) sensor is determined to conduct analysis robot. Through various path tracking experiments in simulation real environment, influence travel...

This paper proposed a polynomial representation-based method for orbit determination (OD) of spacecraft with the unknown maneuver. Different from conventional maneuvering OD approaches that rely on specific dynamic equation, needs no priori information model. The polynomials are used to represent A transformation is made improve convergence and robustness. Extended Kalman Filter (EKF) process i...

This article presents a predictive extended state observer-based repetitive controller (PESO-RC) to simultaneously track and reject periodic signals on systems with long input delay parameter uncertainties. First, novel observer (ESO) is proposed tackle processes delay. Then simple low pass filter incorporated tuned improve robustness against modelling errors. Moreover, the modified (MRC) integ...

This paper considers the reference signal generation problem for multi-functional operation of single-phase dynamic voltage restorers. For this purpose, a quasi type-1 phase-locked loop (QT1-PLL) is proposed. The pre-loop filter part PLL composed frequency-fixed delayed cancellation method and two-stage all-pass filter. Thanks to nature, easy implement can provide rejection any measurement offs...

in this article, vehicle cornering stability and brake stabilization via bifurcation analysis has been investigated. in order to extract the governing equations of motion, a nonlinear four-wheeled vehicle model with two degrees of freedom has been developed. using the continuation software package matcont a stability analysis based on phase plane analysis and bifurcation of equilibrium is perfo...

The term ‘power quality’ [1-2] refers to the purity of the voltage and current wave-form, and a power quality disturbance is a deviation from the pure sinusoidal form. Harmonics superimposed on the fundamental are one cause of such deviations. Power quality problems [1-2] like voltage harmonics, voltage flickers, voltage sags and voltage swells, current harmonics, current unbalance, reactive cu...

Current distortion degrades power quality and affects system performance, especially for sensitive loads that require pure sinusoidal waves. Owing to its excellent dynamic response, a well-designed active filter (APF) can achieve total harmonic (THD) within the acceptable limits defined by IEEE 3002 standards through compensating distortions. The APF consists of two main modules: reference sign...