Optimization of actuator/sensor position of multi-body system with quick startup and brake

A new method was put forward to optimize the position of actuator/sensor of multi-body system with quick startup and brake. Dynamical equation was established for the system with intelligent structure of piezoelectric actuators. According to the property of the modes varying with time, the performance index function was developed based on the optimal configuration principle of energy maximal dissipation, and the relevant optimal model was obtained. According to its characteristic, a float-encoding genetic algorithm, which is efficient, simple and excellent for solving the global-optimal solution of this problem, was adopted. Taking the plane manipulator as an example, the result of numerical calculation shows that, after the actuator/sensor position being optimized, the vibration amplitude of the multi-body system is reduced by 35% compared with that without optimization.     

圆弧板型轴流通风机参数化建模及数值模拟

通过Gambit软件对轴流通风机的模型进行参数化设计,并运用CFD技术对轴流通风机内部三维粘性流场进行数值模拟,快速地得出各种几何参数下风机的性能曲线。     

一种离子交换树脂金属复合材料(IPMC)的力学参数测定

对一种新型的人工肌肉材料--离子交换树脂金属复合材料(IPMC)的力学性能参数进行了测试研究.进行了精密拉伸实验,测定了其弹性模量E和泊松比v,确定了其本构关系,证实了其具有各向同性特性.测试研究为开展IPMC人工肌肉和其应用研究提供了参考数据.