共查询到20条相似文献,搜索用时 375 毫秒
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冶金轧机主传动系统中普遍存在的机电振荡现象不但影响产品质量,而且影响控制系统的稳定性.本文在保证控制系统动态性能的前提下,提出采用线性自抗扰(linear active disturbance rejection control,LADRC)技术中的线性扩张观测器(linear extended state observer,LESO)和线性反馈控制方法来抑制主传动系统机电振荡现象.基于简化的两惯性主传动系统机电模型,由扩张状态观测器估计系统状态变量,通过所设计的基于动态误差反馈控制率达到抑制振荡的目的.文中基于被控对象的微分方程,描述了线性自抗扰控制器的设计方法,并以仿真和实验进行验证.研究结果表明,与改进传统双闭环控制及全维观测器控制方法相比,线性自抗扰控制器在抑制负荷变化带来的扰动以及减小连接轴扭矩方面更有优势. 相似文献
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带传动系统的多体动力学建模与接触振动研究 总被引:1,自引:0,他引:1
结合刚性有限元法和多体动力学方法,提出带传动系统的多体接触的相对坐标递推动力学建模的新方法.以等效的柔性连接力来描述带的柔性变形,结合带体单元结点的相对坐标和面-面接触方法,建立了带传动系统的多体动态接触动力学模型.以平带传动系统为例,新方法综合考虑了柔性带的柔性效应,带体单元与传动轮之间的动态接触、转速、摩擦等因素,分析出带传动系统的横向振动位移、弯矩、动态接触力和张紧力等动力响应特性和接触振动特性.结果表明新方法能有效地计算带传动系统的柔性带的振动特性和接触动力响应等动力学响应特性,为带传动系统的动态设计与改进提供重要的参考数据和理论依据. 相似文献
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《系统工程理论与实践》2014,(5)
正August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists 相似文献
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《系统科学与系统工程学报(英文版)》2014,(2)
正AF:Any Field The School of Economics and Management at Tsinghua University(Tsinghua SEM)invites applications for faculty positions at all levels(Assistant Professor,Associate Professor and Full Professor)in any fields of business administration and management.Tsinghua SEM is the only school 相似文献
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《系统科学与系统工程学报(英文版)》2014,(4)
正June 22-24,2015Guangzhou,China http://iec.cnsba.com/index.htmlCo-Sponsored by:ffiEE SMC(pending)South China University of Technology The Chinese University of Hong Kong Tsinghua UniversityHosted bv:School of Business Administration,South China University of Technology,China Conference Co-Chairs: 相似文献
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The paper is about negotiating with issues that discourage innovation. The subject is environmental deterioration, with concern directed at the impediments that keep it from being innovatively resolved. The paper is organized around three issues. (1) The dominant model of environmental concern, called environmental protection, is managed predominantly via command and control approaches. (2) Command and control, by relying on analytical segmentation to subdivide the problem into digestible bits and using formal legislation to direct it, are not up to emerging challenges in the area. (3) More robust models are available but difficult to experiment with due to impediments that discourage change. These impediments are seen in ideals associated with protection, prevention, recycling, and sustainability that tend to do more to sustain harmful practices than to seek beneficial alternatives. Being able to appreciate the underlying restrictions of entropy could help stimulate a more innovative agenda. These issues are tested via a project funded by the EPA entitled ENERGY STAR Homes. 相似文献