共查询到20条相似文献,搜索用时 492 毫秒
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采用PMBLDC的AUV对转螺旋桨推进系统建模与仿真 总被引:1,自引:0,他引:1
对转稀土永磁无刷直流电机驱动对转螺旋桨,广泛应用于水下无人自主航行器(AUV),分析了对转稀土永磁无刷直流电机的结构、总结了定转子相对位置、电机运行状态与逆变器功率开关管驱动信号的关系,设计了一种采用12个位置传感器的定转子相对位置检测方法,给出了位置传感器与逆变器驱动信号的逻辑关系,在Matlab/SINMULINK平台上,建立了对转螺旋桨模型、对转电机模型、反电势模型、12个位置传感器与逆变器驱动信号译码器模型和转速电流双环控制系统,仿真结果证明模型运行稳定可靠。 相似文献
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模糊机会约束规划因其非线性、非凸性及模糊性,对经典的优化理论提出了极大的挑战.设计了一种基于模糊模拟的混沌量子蚁群算法,为解决复杂的模糊机会约束规划问题提供了有力的工具.算法中每只蚂蚁携带一组表示蚂蚁当前位置信息的量子比特,采用随机干扰离散量子交叉,进行高斯量子变异,为量子旋转门更新设计基于梯度的转角计算方法.在每次迭代的当前全局最优解附近使用混沌量子搜索,搜索范围随迭代次数而逐渐减小,因而在初期能防止陷入局部最优,后期能提高搜索精度.证明了该蚁群算法的收敛隆.数值案例研究验证了该算法的有效性、稳定性及准确性. 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