Optimization Design of the Force Source Mechanism for Microfluidic Device
In order to solve the problem of unstable output pressure of the fluid storage device in microfluidic system,a compliant mechanism is designed as the force source mechanism of the device.The compliant mechanism is designed based on the superposi-tion theory of positive and negative stiffness,and consists of four fixed guide beams and two planar springs.Firstly,the displacement-load relationship of the fixed guide beam and the planar spring is solved by using the chain beam constraint model and the generalized shooting method,and then the optimal solution satisfying the design requirements is obtained by the estab-lished optimization model.Secondly,in order to verify the accuracy of the calculation model.ANSYS is used to analyze the large deformation of the compliant beam,and the results show that the error of the calculation model is less than 1%compared with the finite element analysis.Finally,it is found that there are errors between the experimental value and theoretical design value of the output force of the compliant mechanism after experiment,which may be caused by machining accuracy,material elastic modu-lus error and only considering the deformation of the neutral axis.
NETL
NSTL
万方数据
维普
