Didymella bryoniae in cucumber: an integrated control strategy

In order to eliminate the effect on the grid current caused by the background harmonic voltage and the reference signal on the grid connected multi-inverter, this paper adopts the double closed-loop feed-forward control strategy. This strategy is based on the inductor voltage and the grid-connected current, and the integrated control strategy of quasi-proportional resonance loop parallel to a specific harmonic compensation loop. Based on the closed-loop model of multiple inverters, the change curves of the transfer function of the two control strategies are compared with the feed-forward control and the composite proportional resonance. The two corresponding control methods are used to analyze the current quality of the multi-inverter impact. Finally, the MATLAB/Simulink simulation model is set up to verify the proposed control strategies. The simulation results show that the proposed method can achieve better tracking of the sinusoidal command signal at the fundamental frequency, and enhance the anti-interference ability of the system at the 3rd, 5th, and 7th harmonic frequency.

Download Full-text

Integrated Control Strategy for Inductive Power Transfer Systems with Primary-Side LCC Network for Load-Average Efficiency Improvement

Energies ◽

10.3390/en12020312 ◽

2019 ◽

Vol 12 (2) ◽

pp. 312 ◽

Cited By ~ 4

Author(s):

Sangjoon Ann ◽

Woo-Young Lee ◽

Gyu-Yeong Choe ◽

Byoung Kuk Lee

Keyword(s):

Output Power ◽

Control Strategy ◽

Integrated Control ◽

Control Mode ◽

Power Transfer ◽

Additional Advantage ◽

Inductive Power Transfer ◽

Average Efficiency ◽

Load Average ◽

Inductive Power

An inductive power transfer (IPT) system has lower peak efficiency and significantly lower load-average efficiency over the entire range of output power than typical power conversion systems because it transmits power wirelessly through magnetically coupled coils. In order to improve the load-average efficiency of the IPT system, this paper proposes an integrated control strategy consisting of full-bridge, phase-shift, and half-bridge control modes. The coupling coefficient and output power conditions for each control mode are theoretically analyzed, and the proposed control algorithm is established. In order to verify the analysis results, a 3.3 kW IPT system prototype is constructed, and it is experimentally verified that the load-average efficiency is improved by up to 3.75% with respect to the output power when using the proposed control scheme. In addition, the proposed control has the additional advantage that it can be directly applied to the existing IPT system without changing or adding hardware.

Download Full-text

Integrated control strategy of tractor hydromechanical continuously variable transmission

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/0954407020951148 ◽

2020 ◽

pp. 095440702095114

Author(s):

Guang Xia ◽

Huayu Zong ◽

Xiwen Tang ◽

Linfeng Zhao ◽

Baoqun Sun

Keyword(s):

Control Strategy ◽

Integrated Control ◽

Continuous Variable ◽

Transmission Efficiency ◽

Variable Speed ◽

Speed Regulation ◽

Continuous Variable Transmission ◽

Variable Transmission ◽

Working Resistance ◽

Transmission Speed

Given the transmission efficiency fluctuation and response lag problem of hydromechanical continuous variable transmission combined with the complex and variable working environment of a tractor, an integrated control strategy of engine throttle compensation–hydromechanical continuous variable transmission speed regulation is adopted for dual-flow transmission control. On the basis of the estimation of working resistance, a fuzzy algorithm is used to design the throttle compensation law. Considering the maximum driving power of a tractor as the target of variable speed control, an hydromechanical continuous variable transmission efficiency model is established, and the control law of an hydromechanical continuous variable transmission displacement ratio with the maximum driving power of the tractor under any working condition is determined. On the basis of the wavelet neural network proportional–integral–derivative algorithm, the control law of the hydromechanical continuous variable transmission speed regulation is designed, and the parameters of proportional–integral–derivative control are corrected in real time during the control process. Based on MATLAB/Simulink modelling and simulation and the real vehicle verification test, results showed that the influence of hydromechanical continuous variable transmission efficiency fluctuation on the driving power of the entire vehicle, the response lag of the pump-controlled motor system, and the effect of the leakage on the variable speed control and the fluctuation of the working resistance are solved by studying the hydromechanical continuous variable transmission variable speed transmission control strategy. This strategy improves the stability of the tractor speed and ensured the quality of the work, thereby improving the ability of the tractor to adapt to complex working environments.

Download Full-text

An Integrated Control Strategy for the Fermentation of the Marine-Derived Fungus Aspergillus glaucus for the Production of Anti-cancer Polyketide

Marine Biotechnology ◽

10.1007/s10126-012-9435-6 ◽

2012 ◽

Vol 14 (6) ◽

pp. 665-671 ◽

Cited By ~ 2

Author(s):

Menghao Cai ◽

Xiangshan Zhou ◽

Jian Lu ◽

Weimin Fan ◽

Jiushun Zhou ◽

...

Keyword(s):

Control Strategy ◽

Integrated Control ◽

Aspergillus Glaucus ◽

Anti Cancer

Download Full-text

Research on the Integrated Control Strategy for Splitting, Paralleling and Tie-line Power Flow of Power Grid Based on Back-to-back VSC-HVDC

2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA) ◽

10.1109/iciea.2019.8833770 ◽

2019 ◽

Author(s):

Qiang Sun ◽

Ying Wang ◽

Jiajun Liu ◽

Kun Wang

Keyword(s):

Control Strategy ◽

Power Flow ◽

Integrated Control ◽

Power Grid ◽

Tie Line ◽

Grid Based

Download Full-text

An integrated control strategy of path following and lateral motion stabilization for autonomous distributed drive electric vehicles

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/0954407019884168 ◽

2019 ◽

pp. 095440701988416

Author(s):

Yuan Zou ◽

Ningyuan Guo ◽

Xudong Zhang

Keyword(s):

Model Predictive Control ◽

Predictive Control ◽

Electric Vehicles ◽

Control Strategy ◽

Integrated Control ◽

Path Following ◽

Control Technique ◽

Programming Algorithm ◽

Linear Quadratic ◽

And Control

This article proposes an integrated control strategy of autonomous distributed drive electric vehicles. First, to handle the multi-constraints and integrated problem of path following and the yaw motion control, a model predictive control technique is applied to determine optimal front wheels’ steering angle and external yaw moment synthetically and synchronously. For ensuring the desired path-tracking performance and vehicle lateral stability, a series of imperative state constraints and control references are transferred in the form of a matrix and imposed into the rolling optimization mechanism of model predictive control, where the detailed derivation is also illustrated and analyzed. Then, the quadratic programming algorithm is employed to optimize and distribute each in-wheel motor’s torque output. Finally, numerical simulation validations are carried out and analyzed in depth by comparing with a linear quadratic regulator–based strategy, proving the effectiveness and control efficacy of the proposed strategy.

Download Full-text