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 structure's 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.
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.
This article takes a kind of special supporting structure of deformable mirror as an example to make deeply study on its
optimal design and validity simulation based on finite element analysis. The original resonance frequency and modes
shape of the supporting structure are obtained with the FEA method and the dynamic theory. Then a group of optimized
structure parameters are determined with the BP networks and Genetic Algorithm optimal methods. The simulation
analyses including random vibration, harmonic response and fatigue life are carried out to demonstrate that the dynamic
stiffness of the optimized supporting structure has been improved greatly by the presented optimization method.
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 structure's 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.
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.
Recent advancements in computational fluid dynamics (CFD) software now make it possible to perform a full
three-dimensional turbulent air flow analysis without the need for a supercomputer. The presented study investigates the
airflow effects over 2-meter TSU telescope using CFD method. The effects of air velocity, air pressure about statics and
dynamics and K energy have been calculated by using multi-physical coupling theory and CFD methods. It is shown that
90° angle between main optics axis and horizontal line is the best observation direction in which the air velocity
distribution, airflow pressure deformation and K energy are the least to other directions.
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 radio frequency communication. We select three kind s of the cantilever
beams with different sections to analyze their switch characteristics, and with the help of finite element analysis(FEA)
software ANSYS, multi-physical coupling analysis and simulation are carried out. The threshold voltage, the inherent
frequency of these beams, optimal design, random vibration analysis and fatigue lifetime analysis are also discussed in
detail. The results provide a good theoretical help to design various high performance RF MEMS switches with
variational section beam.
This paper describes the optimization solution improving the total quality of the primary mirror supporting type. With
the methods of Finite element analysis(FEA), Orthogonal experiment and BP Neural Network, the relationship between
the structure parameters in primary mirror supporting type and the deformation of the primary mirror is built. With this
relationship and Genetic Algorithm(GA) optimization design, a group of reasonable technology parameters is found that
can improve the static stiffness of the primary mirror supporting type so as to reduce the gravity deformation of the
primary mirror. The modal analysis and random vibration analysis are also discussed in detail, and the results indicate
that the dynamic stiffness of the primary mirror supporting type is also improved.