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INTELLIGENT CONTROL SYSTEM OF PULSED MAG WELDING INVERTER BASED ON DIGITAL SIGNAL PROCESSOR

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Chinese Journal of Mechanical Engineering 2008年第6期21卷 86-90页

作者： WU Kaiyuan huang shisheng WU Shuifeng LI Xinglin School of Mechanical Engineering South China University of Technology Guangzhou 510640 China

A fuzzy logic intelligent control system of pulsed MAG welding inverter based on digital signal processor （DSP） is proposed to obtain the consistency of arc length in pulsed MAG welding. The proposed control system combines the merits of intelligent control with DSP digital control. The fuzzy logic intelligent control system designed is a typical two-input-single-output structure, and regards the error and the change in error of peak arc voltage as two inputs and the background time as single output. The fuzzy logic intelligent control system is realized in a look-up table （LUT） method by using MATLAB based fuzzy logic toolbox, and the implement of LUT method based on DSP is also discussed. The pulsed MAG welding experimental results demonstrate that the developed fuzzy logic intelligent control system based on DSP has strong arc length controlling ability to accomplish the stable pulsed MAG welding process and controls pulsed MAG welding inverter digitally and intelligently.

关键词： Pulsed MAG welding inverter Arc length control Fuzzy logic intelligent control Digital signal processor (DSP)

Site-directed RNA editing(SDRE):Off-target effects and their countermeasures

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Journal of Genetics and Genomics 2019年第11期46卷 531-535页

作者： Shaoshuai Mao Yajing Liu shisheng huang Xingxu huang Tian Chi School of Life Sciences and Technology ShanghaiTech UniversityShanghai201210China CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesShanghai200031China University of Chinese Academy of Sciences Beijing100049China Department of Immunobiology Yale University School of MedicineNew HavenCT 06520USA

Site-directed RNA editing(SDRE)is invaluable to basic research and clinical applications and has emerged as a new frontier in genome *** past few years have witnessed a surge of interest in SDRE,with SDRE tools emerging at a breathtaking ***,off-target effects of SDRE remain a tough problem,which constitutes a major hurdle to their clinical *** we discuss the diverse strategies for combating off-target editing,drawing lessons from the published studies as well as our ongoing ***,SDRE is still at its infancy,with significant challenges and exciting opportunities ahead.

关键词： Gene editing RNA editing Cas13 Off-target Specificity

ARTIFICIAL NEURAL NETWORK AND FUZZY LOGIC CONTROLLER FOR GTAW MODELING AND CONTROL

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Chinese Journal of Mechanical Engineering 2002年第1期15卷 53-56页

作者： Gao Xiangdong Faculty of Mechanical and Electrical Engineering，Guangdong University of Technology， Guangzhou 510090，China huang shisheng South China University of Technology Faculty of Mechanical and ELectrical Engineering Guangdong University of Technology Guangzhou 510090 South China University of Technology

An artificial neural network(ANN) and a self-adjusting fuzzy logiccontroller(FLC) for modeling and control of gas tungsten arc welding(GTAW) process are *** discussion is mainly focused on the modeling and control of the weld pool depth with ANN and theintelligent control for weld seam tracking with FLC. The proposed neural network can produce highlycomplex nonlinear multi-variable model of the GTAW process that offers the accurate prediction ofwelding penetration depth. A self-adjusting fuzzy controller used for seam tracking adjusts thecontrol parameters on-line automatically according to the tracking errors so that the torch positioncan be controlled accurately.

关键词： Artificial neural network Fuzzy logic control Weld pool depth Seamtracking

RESEARCH & DESIGN OF 60 kW SOFT-SWITCHING PLASMA CONVERTER

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Chinese Journal of Mechanical Engineering 2006年第1期19卷 28-31页

作者： DU Gulping huang shisheng WANG Zhenmin ZENG Min CHEN Lijun Research and Design Center Guangzhou Electric Apparatus Research Institute Guangzhou 510300 China College of Mechanical Engineering South China University of Technology Guangzhou 510640 China College of Electrical and Power South China University of Technology Guangzhou 510640 China

A novel 60 kW plasma converter with full range soft-switch by utilizing magnetizing inductance, leakage inductance and distributed inductance is introduced. The current injection phase-shifting technique is introduced into the research of soft-switching plasma converter successfully. The magnetic bias of transformer and the protection of switching parts are solved. The tests state that the power supply has excellent characteristics and higher efficiency and can meet the demand of large power plasma process well.

关键词： Soft-switching Current injection technique Plasma converter

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60kW级软开关等离子喷涂高效电源研究

电工技术学报 2005年第4期20卷 94-97页

作者：杜贵平黄石生佛山科学技术学院自动化系佛山528000 华南理工大学机电系广州510640

介绍了一种基于零电压软开关技术和双闭环控制模式的大功率等离子喷涂高频开关电源。实验表明该电源具有优良的性能和较高的效率,可以实现全范围软开关,具有良好的限流和抗偏磁能力,能够很好满足等离子喷涂的工艺需求。

关键词：软开关高效电源等离子喷涂

Weld quality control by neural network

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China Welding 1994年第1期3卷 53-59页

作者： huang shisheng Li Di and Song Yonglun (South China University of Technology)

Artificial neural network (ANN) is used for establishment of the models in GTAW conditions. The effectiveness of the static model is tested from both the weld quality and quantity aspects, and the dynamic model successfully takes the intelligent control of the weld quality. It is found that the ANN control strategy has a strong fault tolerance property and owes the good generality in welding quality control.

关键词： welding quality control neural network

Enhancing prime editing efficiency by modified pegRNA with RNA G-quadruplexes

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Journal of Molecular Cell Biology 2022年第4期14卷 65-68页

作者： Xiangyang Li Xin Wang Wenjun Sun hisheng huang Mingtian Zhong Yuan Yao Quanjiang Ji Xingxu huang Gene Editing Center School of Life Science and TechnologyShanghai Tech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China Institute for Brain Research and Rehabilitation Guangdong Key Laboratory of Mental Health and Cognitive ScienceCenter forStudies of Psychological ApplicationSouth China Normal UniversityGuangzhou 510631China HangzhouGlobal Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China Schoolof Physical Science and Technology.ShanghaiTech University Shanghai 201210China Guangzhou Laboratory Guangzhou International Bio IslandGuangzhou 510005China

Dear Editor,Recent study shows that the prime editing system fusing the Cas9 nickase and reverse transcriptase could perform all types ofgene modifications,including basesubstitutions(transitionsand transversions),small insertions,and deletions,without requiringdonor DNA or double-strand breaks(DSBs)(Anzalone et al.,2019).Despite the accuracy and versatility,the efficiencyof the prime editor(PE)is often insufficient,which limits its broadapplications.

关键词： prime donor transitions

基于DSP的软开关逆变式双丝高速脉冲焊装备

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焊接学报 2010年第5期31卷 1-4页

作者：李远波黄石生广东工业大学机电工程学院广州510006 华南理工大学机械与汽车工程学院广州510640

将脉冲焊、软开关逆变、嵌入式控制及现场总线通信技术等有机地结合,研制了协同控制的Tandem型双丝高速焊装备.脉冲电源主电路采用饱和电感并充分利用励磁能量拓宽软开关范围,针对双丝脉冲焊电弧形态、熔滴过渡及电源外特性和动特性的要... 详细信息

将脉冲焊、软开关逆变、嵌入式控制及现场总线通信技术等有机地结合,研制了协同控制的Tandem型双丝高速焊装备.脉冲电源主电路采用饱和电感并充分利用励磁能量拓宽软开关范围,针对双丝脉冲焊电弧形态、熔滴过渡及电源外特性和动特性的要求,提出基于电流峰值模式的双闭环控制模式,设计了基于DSP与μC/OS-II的占先式嵌入式控制系统;利用CAN现场总线通信技术解决了双丝脉冲焊两路输出同相、反相与随机三种形式的协同控制问题.结果表明,电源性能满足设计要求,双丝高速脉冲焊接过程稳定、焊缝成形好、飞溅小、变形小.

关键词：双丝高速脉冲焊协同控制软开关双闭环控制嵌入式控制系统

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自动埋弧焊接过程的电弧控制方程与热学分析

焊接学报 2007年第11期28卷 22-24页

作者：刘超英黄石生肇庆学院电子信息与机电工程学院广东肇庆526061 华南理工大学机械工程学院广州510640

埋弧焊系统由恒流特性逆变焊接电源、送丝机、行走小车和控制器组成。控制器的输入是电弧电压Uarc和设置电压Uset,控制器的输出是PWM方式调节DC电源,驱动并调节送丝速度。用一阶微分方程建立了埋弧焊接过程中焊丝送进速度与焊接电弧之... 详细信息

埋弧焊系统由恒流特性逆变焊接电源、送丝机、行走小车和控制器组成。控制器的输入是电弧电压Uarc和设置电压Uset,控制器的输出是PWM方式调节DC电源,驱动并调节送丝速度。用一阶微分方程建立了埋弧焊接过程中焊丝送进速度与焊接电弧之间的数学模型,模型描述了埋弧焊接过程中焊丝一边在电弧中燃烧,一边由送丝机不断送到燃弧区的平衡关系。通过电源、熔池、焊丝的热平衡分析,得到焊接系统的焊丝选取方法,该方法是焊丝直径与焊接电流的平方根成正比,文中还给出了焊丝直径与焊接电流的定量选取公式。

关键词：埋弧焊动力学模型热学分析焊丝直径