The potential role of formal structural optimization was investigated for designing foldable and deployable structures in this work.Shape-sizing nested optimization is a challenging design problem.Shape,represented by...The potential role of formal structural optimization was investigated for designing foldable and deployable structures in this work.Shape-sizing nested optimization is a challenging design problem.Shape,represented by the lengths and relative angles of elements,is critical to achieving smooth deployment to a desired span,while the section profiles of each element must satisfy structural dynamic performances in each deploying state.Dynamic characteristics of deployable structures in the initial state,the final state and also the middle deploying states are all crucial to the structural dynamic performances.The shape was represented by the nodal coordinates and the profiles of cross sections were represented by the diameters and thicknesses.SQP(sequential quadratic programming) method was used to explore the design space and identify the minimum mass solutions that satisfy kinematic and structural dynamic constraints.The optimization model and methodology were tested on the case-study of a deployable pantograph.This strategy can be easily extended to design a wide range of deployable structures,including deployable antenna structures,foldable solar sails,expandable bridges and retractable gymnasium roofs.展开更多
提出用非线性序列二次规划(SQP,Sequen tial Q uadratic P rogramm ing)算法解决发动机性能寻优控制问题。分析了线性规划(LP,L inear P rogramm ing)算法用于发动机性能寻优的固有缺陷以及SQP算法的优点。给出了SQP算法与LP算法用于最...提出用非线性序列二次规划(SQP,Sequen tial Q uadratic P rogramm ing)算法解决发动机性能寻优控制问题。分析了线性规划(LP,L inear P rogramm ing)算法用于发动机性能寻优的固有缺陷以及SQP算法的优点。给出了SQP算法与LP算法用于最大推力模式和最小油耗模式仿真结果对比曲线。数字仿真实验的结果表明,SQP算法具有比LP算法更好的优化效果,在工程实际中有很大的应用潜力。展开更多
基金Project(030103) supported by the Weaponry Equipment Pre-Research Key Foundation of ChinaProject(69982009) supported by the National Natural Science Foundation of China
文摘The potential role of formal structural optimization was investigated for designing foldable and deployable structures in this work.Shape-sizing nested optimization is a challenging design problem.Shape,represented by the lengths and relative angles of elements,is critical to achieving smooth deployment to a desired span,while the section profiles of each element must satisfy structural dynamic performances in each deploying state.Dynamic characteristics of deployable structures in the initial state,the final state and also the middle deploying states are all crucial to the structural dynamic performances.The shape was represented by the nodal coordinates and the profiles of cross sections were represented by the diameters and thicknesses.SQP(sequential quadratic programming) method was used to explore the design space and identify the minimum mass solutions that satisfy kinematic and structural dynamic constraints.The optimization model and methodology were tested on the case-study of a deployable pantograph.This strategy can be easily extended to design a wide range of deployable structures,including deployable antenna structures,foldable solar sails,expandable bridges and retractable gymnasium roofs.
文摘提出用非线性序列二次规划(SQP,Sequen tial Q uadratic P rogramm ing)算法解决发动机性能寻优控制问题。分析了线性规划(LP,L inear P rogramm ing)算法用于发动机性能寻优的固有缺陷以及SQP算法的优点。给出了SQP算法与LP算法用于最大推力模式和最小油耗模式仿真结果对比曲线。数字仿真实验的结果表明,SQP算法具有比LP算法更好的优化效果,在工程实际中有很大的应用潜力。
