Chunling Meng

Analysis and simulation of RF MEMS switch

Along with the fast development of the automotive electronics technology, the wireless communication technique on vehicles has huge market potential. This paper takes the cantilever beam MEMS switch as an example to discuss mechanical principle and function simulation of the RF MEMS switch used in Vehicle-carried radio frequency communication. We select three kinds of cantilever beams with different section to analyze their switch characteristics, compute and use ANSYS software to carry out multi-physical coupling analysis and simulation. The threshold voltage, inherent frequency and optimal design of three kinds of beams are also discussed. The results provide a satisfactory theoretical support to design various high performance RF MEMS switches with variational section beam.

Design optimization of cantilever Beam MEMS switch

This paper takes the cantilever beam MEMS switch as an research object to discuss its mechanical principle and carry out optimal design. Four kinds of cantilever beams with different sections are selected to analysis their mode frequencies. Referring the larger mode frequency of MEMS structure, an optimal design solution has been introduced to determine a group of reasonable structure parameters which improve the dynamic stiffness of the switch. Finally, the random response and harmonic response analysis are implemented to validate the optimal design.

Optimization study on the deformable mirror support structure of the hyperspectral imaging system for food detection

The deformable mirror (DM) is a critical optoelectronics component of the hyperspectral imaging system for food detection. It is very significant for the deformable mirror to design the best support structure with high dynamic stiffness. Based on the finite element analysis method, this paper discusses the DM support structures mechanical principle and carries out optimal design. Three kinds of DM support structures with different sections are selected to compare their resonate frequencies. The type of the support structure with larger resonant frequency is picked up, then an optimal design solution has been introduced to determine a group of rational structure parameters which improve the resonate frequency of the support. Finally, the validity simulation analyses including random vibration and harmonic response are carried out to demonstrate that the optimization method is effective to improve the performance of the DM support structure of the hyperspectral imaging system for food detection.

Design optimization and validity simulation for the support structure of the segment deformable mirror

How to design the best support structure of the segment deformable mirror(DM) to ensure the high dynamic stiffness, which is very significant for the image system of the MOEMS(micro-opto-electro-mechanical systems). Based on the finite element analysis and neutral network, this article presents an optimization design method for the segment DM support structure. The modal analysis is implemented by the finite element software ANSYS. And the structure parameters of the support structure are optimized with the methods of Orthogonal experiment, BP Neural Network and Genetic Algorithm(GA). The validity simulation of the optimization is verified by the analyses of the random vibration, harmonic response and fatigue life. It proves that the optimization method adopted in this article is effective to improve the performance of the segment DM support structure.

Intelligent Structural Optimum Design for the Circle Support Structure of Deformable Mirror

In order to find efficient and robust structural optimum design method for the deformable mirror (DM) support structure, this paper analyzes a kind of circle structure based on the finite element analysis results of ANSYS software. Aiming at finding the maximum resonate frequency of this support structure, an intelligent solution combining orthogonal experiment, BP neural network and genetic algorithms(GA) is applied to optimization of the structural parameters for the circle support structure. It is shown that the intelligent method presented in this paper is an effective way for solving complex, multi variable structure optimum problems. Keywords-deformable mirror; circle support structure; BP neural network; intelligent structural optimum design; finite element analysis

Finite element analysis of the deformable mirror

As a critical optoelectronics component of adaptive optics, the deformable mirrors (DM) is concerned by more and more researchers and has been developed even faster in recent years. In order to obtain the high mirror accuracy and image quality, it is very significant for the deformable mirror to design the best support structure with high dynamic stiffness. This paper discusses the DM support structures mechanical principle and carries out optimal design based on the finite element analysis. Three kinds of DM support structures with different sections are selected to analyze their resonate frequencies. After determining the support structure with larger mode frequency among them, an optimal design solution has been introduced to determine a group of reasonable structure parameters which improve the resonate frequency of the supporting structure. Finally, the random response, harmonic response analysis and fatigue lifetime analysis of the support structure are implemented to confirm the effect of the optimal design, and provide basis for the design of subassembly structure of the deformable mirrors.

Research on the surface of a nonspherical lens with photosensitive colophony

This paper does research on the shrinkage deformation caused by photosensitive colophony solidification in manufacturing aspheric surface lens. With Finite Element Analysis, Orthogonal Experiment, and BP Neural Network methods, the relationship between the shrinkage deformation of aspheric lens and structure parameters is built up. With the mathematic model, the shrinkage compensable software for aspheric lens manufacturing is compiled to find out the original shape after the shrinkage deformed shape is given. As a result, the mould surface curve is easily obtained in accordance with the given aspheric lens shape.

Optimal design for the two degrees-of-freedom optical switch

It is significant for the two freedom degree optical switch to study its mechanical characteristics and structural optimum design to improve its dynamic stiffness. Based on the finite element analysis and optimization calculation, a group of optimized structure parameters of optical switch is obtained. The validity simulation of the results is verified by the analyses of the random vibration, harmonic response and fatigue life. It proves that the optimization method adopted in this article is effective to improve the mechanical performance of the two freedom degree optical switch.