摘要：
When the unstable complex system employs PID to control, as the manual regulation of parameters, it does not only time-consuming but also cannot guarantee the best performance; as a result it is hard to achieve good controlling effect. Basing on the advantages of particle swarm algorithm, this paper puts forward the controlling strategy of utilizing particle swarm algorithm to optimize PID parameters. It provides the controlling model and principle of particle swarm optimizing PID parameters, as well as doing simulation analysis on several unstable complex systems. When input provides a unit step signal, it can get the corresponding response curve quickly, which has good controlling effect on the controlled object and has certain application value in practice.
作者：
Li Jia-Sheng;Wang Jia-Jia;Tian Wang-Lan;Hu Sai-Chun;Xiao Wei-Chu
期刊：
Information Technology Journal,2013年12(5):1004-1010 ISSN：1812-5638
通讯作者：
Li, J.-S.
作者机构：
[Hu Sai-Chun; Li Jia-Sheng; Wang Jia-Jia; Tian Wang-Lan; Xiao Wei-Chu] College of Communication and Electronic Engineering, Hunan City University, Hunan Yiyang, 413000, China
通讯机构：
[Li, J.-S.] C;College of Communication and Electronic Engineering, Hunan City University, China
关键词：
Add-window interpolation;Harmonic and inter-harmonic;Small hydro
期刊：
Information Technology Journal,2013年12(11):2201-2206 ISSN：1812-5638
通讯作者：
Li, J.-S.
作者机构：
[Li Jia-Sheng; Tian Wang-Lan] College of Communication and Electronic Engineering, Hunan City University, Hunan Yiyang, 413000, China;[Wang Ying-De] Department of Electronics and Communication Engineering, Changsha University, Hunan Changsha, 410003, China
通讯机构：
[Li, J.-S.] C;College of Communication and Electronic Engineering, Hunan City University, China
关键词：
Distributed generation;Genetic algorithm;RBF neural network;Singular value
会议名称：
International Conference on Applied Physics and Industrial Engineering (ICAPIE)
会议时间：
MAR 01-02, 2012
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Li Jia-sheng;Yang Wu-mei] Yiyang Profess Technol Inst, Yiyang 413049, Peoples R China.^[Jiang Lian-jun;Qiu Biao] Hunan City Univ, Dept Phys & Elect Engn, Yiyang 413000, Peoples R China.
会议论文集名称：
Physics Procedia
关键词：
Matrix;Frequency Transformer;SPWM;Electronic shore power station
摘要：
The current port power supply to foreign ships, there are two ways power-type for owned diesel-powered and frequency conversion unit,In this paper,Proposed electronic shore power station, put forward electronic shore power station's concepts, and gives a whole building program of electronic shore power station based on matrix conversion algorithm, It will change 10kV/50Hz (35Kv/50Hz) input voltage into 440V/60Hz low-voltage, not only eliminating intermediate links, but also simplify the hardware circuit and reduce the production cost and improve the competitiveness of enterprises. Simulation and experimental results show that this program has a built shore power station of high power factor, sinusoidal effective, low distortion, environmental pollution and the advantages,It will be very definite practical significance. (C) 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of ICAPIE Organization Committee.
作者：
Li Jiasheng;Xiao Weichu;Zhang Xuejun;Li Wenguo;Hu Saichun
期刊：
Information Technology Journal,2012年11(11):1632-1637 ISSN：1812-5638
通讯作者：
Jiasheng, L.
作者机构：
[Jiasheng L.; Weichu X.; Xuejun Z.; Saichun H.; Wenguo L.] College of Communication and Electronic Engineering, Hunan City University, Yiyang, Hunan, 413000, China
通讯机构：
[Jiasheng, L.] C;College of Communication and Electronic Engineering, Hunan City University, China
期刊：
Information Technology Journal,2012年11(3):354-358 ISSN：1812-5638
通讯作者：
Li, J.
作者机构：
[Li Jiasheng; Xiao Weichu; Hu Saichun; Qiu Biao] College of Communication and Electronic Ensaneering, Hunan City University, Yiyang, Hunan, 413000, China
通讯机构：
[Li, J.] C;College of Communication and Electronic Ensaneering, Hunan City University, China
作者机构：
[肖卫初; 李加升] College of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China;[杨金辉] Chinese Institute of Electronics, Beijing 100036, China;[肖卫初; 杨金辉] College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
通讯机构：
[Li, J.] C;College of Communication and Electronic Engineering, Hunan City University, China
期刊：
Applied Mechanics and Materials,2012年130-134:3280-3283 ISSN：1660-9336
通讯作者：
Xiao Wei-chu
作者机构：
[Xiao Wei-chu; Jiang Li-jun; Li Jia-sheng] Hunan City Univ, Dept Phys & Elect Engn, Yiyang 413002, Hunan, Peoples R China.
通讯机构：
[Xiao Wei-chu] H;Hunan City Univ, Dept Phys & Elect Engn, Yiyang 413002, Hunan, Peoples R China.
会议名称：
2011 3nd International Conference on Mechanical and Electronics Engineering(2011年第三届机械与电子工程国际会议 ICMEE2011)
会议时间：
2011-09-23
会议地点：
合肥
会议主办单位：
[Xiao Wei-chu;Li Jia-sheng;Jiang Li-jun] Hunan City Univ, Dept Phys & Elect Engn, Yiyang 413002, Hunan, Peoples R China.
会议论文集名称：
2011 3nd International Conference on Mechanical and Electronics Engineering(2011年第三届机械与电子工程国际会议 ICMEE2011)论文集
关键词：
Fourier series;SPWM;harmonic wave;analyze
摘要：
A mathematical model for the output waveform of SPWM VSI (voltage source inverter) is created specific to the harmonic problem of SPWM voltage source inverter. Through theoretical analysis and calculation, we can get the distribution regularity of the output harmonic wave in the process of frequency conversion and voltage transformation. Utilizing the matlab to verify the simulation, we can get such results like "frequency conversion will lead to the shift of the harmonic wave's distribution center", "voltage transformation will cause the valuable change of the harmonic wave and the valuable change direction of harmonic wave is opposite to that of the fundamental wave". All of these will have significant guide meaning to the application of SPWM.
