设计一种基于车辆位置监控的RTK定位实验教学装置,给出车辆位置监控的高精度RTK定位与精度评定模型。基于Visual Studio 2010平台,利用C#编程语言设计开发一种高精度RTK定位实验软件,无缝嵌入于云端服务器。研制一种基于车辆位置监控的...设计一种基于车辆位置监控的RTK定位实验教学装置,给出车辆位置监控的高精度RTK定位与精度评定模型。基于Visual Studio 2010平台,利用C#编程语言设计开发一种高精度RTK定位实验软件,无缝嵌入于云端服务器。研制一种基于车辆位置监控的高精度RTK定位实验教学装置系统(GNSSITMS)。初步应用试验结果表明:GNSSITMS装置在线运行的稳定性良好,用于车辆位置监控实验的RTK定位模型精度处于厘米级水平,其中97%以上观测历元的北向监控精度优于2 cm,东向监控精度优于2 cm,高程监控精度优于4 cm,平面监控精度优于3 cm,点位监控精度优于5 cm,本模型与方法及装置系统研制是可行且有效的。展开更多
For the impact of intermittent resources＇ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, c...For the impact of intermittent resources＇ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, considering a cooperative strategy between diesel generator （hereinafter referred to as DE） and battery energy storage system （BESS）. The optimum economic operation range of DE and the optimal set-point between DE and BESS are presented in the cooperative dispatch strategy, in which BESS is used fully to enable DE in a lower cost and higher efficient way. The results are analyzed under various operation conditions and also prove the validity of the DrODosed method.展开更多
This study presents a dynamic modeling and analysis methodology for the 3-PRS parallel mechanism.First,an improved reduced dynamic model of component substructures is proposed using the dynamic condensation technique ...This study presents a dynamic modeling and analysis methodology for the 3-PRS parallel mechanism.First,an improved reduced dynamic model of component substructures is proposed using the dynamic condensation technique and the rigid multipoint constraints at the joint/interface level,leading to a minimum set of generalized coordinates for external nodes.Next,the mapping between interface constraint stiffness and global stiffness is illustrated,resulting in an analytical stiffness model of joint substructures.Subsequently,the derived component and joint substructures are synthesized into the entire mechanism based on the Lagrange equation.Finally,a case study illustrates that the lower-order dynamic performances predicted within the proposed approach have the same trend as those obtained from a complete-order finite element model.The root mean square discrepancy of the lower-order natural frequencies between the two models is less than 5.92%,indicating the accuracy and effectiveness of the proposed model.The developed approach can highly and efficiently predict the dynamic performance distributions across the entire workspace and guide the optimal functional design under the virtual machine framework.展开更多
基金the National Natural Science Foundation of China(No.61703068)the Scientific and Technological Research Program of Chongqing Municipal Education Commission(No.KJ1704097)+1 种基金the Chongqing Basic Science and Advanced Technology Research Project(No.cstc2016jcyjA1919)the Doctor Start-up Funding of Chongqing University of Posts and Telecommunications(No.A2016-05)
文摘For the impact of intermittent resources＇ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, considering a cooperative strategy between diesel generator （hereinafter referred to as DE） and battery energy storage system （BESS）. The optimum economic operation range of DE and the optimal set-point between DE and BESS are presented in the cooperative dispatch strategy, in which BESS is used fully to enable DE in a lower cost and higher efficient way. The results are analyzed under various operation conditions and also prove the validity of the DrODosed method.
基金supported by the EU Horizon 2020 research and innovation program under the Marie Sk?odowska-Curie (Grant No.734272)the China Scholarship Council (Grant No.201908060118)。
文摘This study presents a dynamic modeling and analysis methodology for the 3-PRS parallel mechanism.First,an improved reduced dynamic model of component substructures is proposed using the dynamic condensation technique and the rigid multipoint constraints at the joint/interface level,leading to a minimum set of generalized coordinates for external nodes.Next,the mapping between interface constraint stiffness and global stiffness is illustrated,resulting in an analytical stiffness model of joint substructures.Subsequently,the derived component and joint substructures are synthesized into the entire mechanism based on the Lagrange equation.Finally,a case study illustrates that the lower-order dynamic performances predicted within the proposed approach have the same trend as those obtained from a complete-order finite element model.The root mean square discrepancy of the lower-order natural frequencies between the two models is less than 5.92%,indicating the accuracy and effectiveness of the proposed model.The developed approach can highly and efficiently predict the dynamic performance distributions across the entire workspace and guide the optimal functional design under the virtual machine framework.
