期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
短纤维增强橡胶密封复合材料界面疲劳损伤行为 被引量:6
1
作者 宇晓明 张斌 顾伯勤 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2021年第2期108-115,共8页
依据广义自洽方法,建立了包含芳纶纤维、界面相、橡胶基体和等效介质的代表性体积单元(RVE)模型。采用自定义材料子程序对内聚力疲劳累积损伤模型进行编译,分别在基体/界面相的界面和纤维/界面相的界面设置内聚力单元,研究界面相性能参... 依据广义自洽方法,建立了包含芳纶纤维、界面相、橡胶基体和等效介质的代表性体积单元(RVE)模型。采用自定义材料子程序对内聚力疲劳累积损伤模型进行编译,分别在基体/界面相的界面和纤维/界面相的界面设置内聚力单元,研究界面相性能参数对纤维增强橡胶密封复合材料(SFRC)界面疲劳损伤行为的影响。探讨了界面相厚度和模量的确定方法,获得了不同界面相厚度和模量下SFRC界面脱粘起始位置以及脱粘起始疲劳次数。结果表明,较低的界面相模量能够抑制界面脱粘的产生;随着界面相厚度的增加,界面脱粘的起始疲劳次数增加,SFRC抗疲劳损伤能力得到提高。 展开更多
关键词 纤维 复合材料 界面相 广义自洽方法 内聚力模型
在线阅读 下载PDF
Stabilizing model predictive control scheme for piecewise affine systems with maximal positively invariant terminal set
2
作者 Fu Chen Guangzhou Zhao xiaoming yu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第6期1090-1094,共5页
An efficient algorithm is proposed for computing the solution to the constrained finite time optimal control (CFTOC) problem for discrete-time piecewise affine (PWA) systems with a quadratic performance index. The... An efficient algorithm is proposed for computing the solution to the constrained finite time optimal control (CFTOC) problem for discrete-time piecewise affine (PWA) systems with a quadratic performance index. The maximal positively invariant terminal set, which is feasible and invariant with respect to a feedback control law, is computed as terminal target set and an associated Lyapunov function is chosen as terminal cost. The combination of these two components guarantees constraint satisfaction and closed-loop stability for all time. The proposed algorithm combines a dynamic programming strategy with a multi-parametric quadratic programming solver and basic polyhedral manipulation. A numerical example shows that a larger stabilizable set of states can be obtained by the proposed algorithm than precious work. 展开更多
关键词 constrained optimal predictive control multi-parametric quadratic programming dynamic programming receding horizon control positively invariant set.
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部