نتایج جستجو برای: tracking differentiator
تعداد نتایج: 115093 فیلتر نتایج به سال:
In this paper design of non-recursive higher order low pass digital differentiators satisfying given specifications is investigated. The concept of low pass differentiation is further generalized to higher order differentiators. A formula is derived using Fourier integral to compute impulse response coefficients of the differentiator. The equation is then used to design first order differentiat...
We propose and experimentally demonstrate the flexibility and versatility of photonic differentiators using a silicon-based Mach-Zehnder Interferometer (MZI) structure. Two differentiation schemes are investigated. In the first scheme, we demonstrate high-order photonic field differentiators using on-chip cascaded MZIs, including first-, second-, and third-order differentiators. For single Gaus...
Different evolutionary algorithms (EAs), namely, particle swarm optimization (PSO), genetic algorithm (GA), and PSO-GA hybrid optimization, have been used to optimize digital differential operators so that these can be better fitted to exemplify their new improved fractional order differentiator counterparts. First, the paper aims to provide efficient 2nd and 3rd order operators in connection w...
In this paper, an active disturbance rejection control is designed to improve the position tracking performance of electro-hydraulic actuation system in presence parametric uncertainties, non-parametric and external disturbances as well. The observers (Dos) are proposed estimate not only matched lumped uncertainties but also mismatched disturbance. Without velocity measurement, unmeasurable ang...
In order to improve the performance of voltage source converter-high voltage direct current (VSC-HVDC) system, we propose an improved auto-disturbance rejection control (ADRC) method based on least squares support vector machines (LSSVM) in the rectifier side. Firstly, we deduce the high frequency transient mathematical model of VSC-HVDC system. Then we investigate the ADRC and LSSVM principles...
Directing at the problem of torsional vibration occurred in the start-up procedures of long shaft drive transmission existed in printing equipment, we raised a variable structure control method based on Variable parameters fuzzy. The method not only displays feature of traditional non-linear variable structure control like nondeference derivation, planning the dynamic process and good capacity ...
Compared to alternating current (AC) grids, direct (DC) grids are becoming more and popular. A power distribution approach is suggested in order solve the issue of uneven distributed generation (DG) a ship DC microgrid. Power control carried out using tracking differentiator (TD), while output change rate not greater than maximum ramp permitted by battery, state-of-charge balance attained quick...
This paper proposed a data-driven adaptive optimal control approach for CVCF (constant voltage, constant frequency) inverter based on reinforcement learning and dynamic programming (ADP). Different from existing literature, the load is treated as uncertainty robust state-feedback controller proposed. The stability of inverter-load system has been strictly analyzed. In order to obtain accurate o...
This paper proposes an image-based visual servoing control method for a moving target of quadrotor UAV (QUAV). Firstly, the dynamic image model with parameters is established based on moment features in virtual camera plane. For unpredictability space, we use high-order differentiator to estimate state target. In order solve problem depth information caused by monocular camera, derive nonlinear...
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