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电液伺服加载系统的神经网络逆控制 被引量:3
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作者 沈毅力 王宏贵 李天石 《系统仿真学报》 CAS CSCD 2002年第12期1663-1665,共3页
针对液压加载系统及试件的特殊要求,采用基于径向基函数网络(RBFN)的逆控制器,给出了系统NARMA模型及逆模型存在的条件。该方法使用实际系统的输入输出信号以及径向基函数网络实现系统建模,并利用系统神经网络模型离线训练系统的逆动态... 针对液压加载系统及试件的特殊要求,采用基于径向基函数网络(RBFN)的逆控制器,给出了系统NARMA模型及逆模型存在的条件。该方法使用实际系统的输入输出信号以及径向基函数网络实现系统建模,并利用系统神经网络模型离线训练系统的逆动态作为控制器,以克服由于实际系统所受的扰动而可能引起的控制器(逆模型)不收敛。实际控制表明该系统对期望加载轨线具有良好的跟踪能力,同时对系统干扰和不确定性具有较强的鲁棒性。 展开更多
关键词 电流伺服系统 视经网络 逆控制 航天器
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船舶防腐蚀阴极保护法系统稳定性设计 被引量:6
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作者 菅恒康 赵俊 +1 位作者 张文喆 郑卫刚 《环境研究与监测》 2012年第3期45-48,共4页
通过对船舶腐蚀的基本原理分析以及传统防腐蚀方法的阐述,在此基础上提出了船舶腐蚀防护方法中外加电流建立反馈系统,对船舶腐蚀防护进行更好的监测和处理。对于外加电流船舶腐蚀防护法实施技术性监控,建立反馈系统。提高外加电流系统... 通过对船舶腐蚀的基本原理分析以及传统防腐蚀方法的阐述,在此基础上提出了船舶腐蚀防护方法中外加电流建立反馈系统,对船舶腐蚀防护进行更好的监测和处理。对于外加电流船舶腐蚀防护法实施技术性监控,建立反馈系统。提高外加电流系统的可靠性。为当今船舶腐蚀防护方法提出一个明确的发展方向。 展开更多
关键词 船舶防腐蚀 阴极保护法外 加电流系统 恒电位
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Excess Heat Triggered by Different Current in a D/Pd Gas-Loading System 被引量:3
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作者 Xin Lu Bingjun Shen +3 位作者 Lihong Jin Xinle Zhao Hongyu Wang Jian Tian 《Journal of Energy and Power Engineering》 2013年第7期1299-1303,共5页
In order to study the relationship between the triggering current, deuterium pressure and the excess heat, a series of experiments were made in a D/Pd gas-loading system. By comparing the system constants (k = AT//kP... In order to study the relationship between the triggering current, deuterium pressure and the excess heat, a series of experiments were made in a D/Pd gas-loading system. By comparing the system constants (k = AT//kP) in both nitrogen and deuterium atmosphere we found an optimum current (8 A) and a deuterium pressure (9 x 104 Pa) in which the system could release a maximum excess power (more than 80 W). The reproducibility was 16/16 and the excess energy released in the longest experiment was about 300 MJ within 40 days, which was corresponding to 104 eV for each palladium atom. Analysis of the palladium surface with a SEM (scanning electron microscopy) and an EDS (energy dispersive spectrometer) revealed that some new surface topographical feature with concentrations of unexpected elements (such as Ag, Sn, Pb and Ca) appeared after the current triggering. The results implied that the excess heat might come from a nuclear transmutation. 展开更多
关键词 Current triggering deuterium pressure D/Pd gas-loading system excess heat.
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Potential Solution of Power Flow Constraints of Bangladesh Power System
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作者 Nahid-Al-Masood Samsuzzaman Rupu Shaikh Mostafa Fahad Khalid Imtiaz Saad Md. Quamrul Ahsan 《Journal of Energy and Power Engineering》 2012年第8期1315-1319,共5页
This paper presents a potential solution of power flow constraints of BPS (Bangladesh power system) using VAR (volt ampere reactive) compensation. VAR compensation is defined as the management of reactive power to... This paper presents a potential solution of power flow constraints of BPS (Bangladesh power system) using VAR (volt ampere reactive) compensation. VAR compensation is defined as the management of reactive power to improve the performance ofac power systems. The concept of VAR compensation embraces a wide and diverse field of both system and customer problems, especially related with power quality issues, since most of power quality problems can be attenuated or solved with an adequate control of reactive power. VAR compensation in transmission systems also improves the stability of the ac system by increasing the maximum active power that can be transmitted. It also helps to maintain a substantially fiat voltage profile at all levels of power transmission. BPS is currently facing problems in few 132 grid points where the thermal limits of transmission are often exceeded. BPS is also foreseeing problem in transmitting additional power from the new generating units in Sylhet to Dhaka zone. This paper investigates the potential solution to these transmission problems. 展开更多
关键词 FACTS devices thermal limit VAR compensation power transfer overloading problem.
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