With the intelligent development of small-caliber ammunition, the overall size of the fuze is compressed. In this paper, a theoretical method-energy statistical method has been proposed according to the MEMS S&A device. Taking the slider mass, micro-spring stiffness, latch mechanism size, and initial offset distance into account, the conversion relationship among each part of energy in the process is obtained. For an existing structure of MEMS S&A device, known parameters are utilized to reverse the overload value at arming condition. The ANSYS/LS-DYNA finite element analysis software is used for simulation analysis, thereby confirming the feasibility of theoretical calculations. Also, theoretical calculation error ε is obtained, which to be 0.7%. Energy statistical method and simulation analysis serve as theoretical references for the design of the MEMS S&A device.
In this paper, a novel locking mechanism of MEMS S&A device has been proposed. Through establishing the mathematical model of the motion for the slider and simulating the physical model by the non-linear dynamic mechanics, appropriate novel locking mechanism is designed to meet two items, one item is the slider can slide to the bottom under the launch overload conditions; the other item is the slider cant be pulled back after the launch overload conditions. Through the experiment, the feasibility of the above research is confirmed.
In this paper, a mechanical MEMS S&A device has been proposed. The size of the device is 10mm×13mm×0.5mm. The role of the threshold value judging mechanism is to determine the environment suffered by centrifugal force and control the sub-centrifugal slider not movement under the threshold, so as to effectively guarantee the time of long-distance arming. Through establishing the three-dimensional model of threshold value judging mechanism, establishing the force and the parameters of locking-releasing mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory and establishing the finite element model by using ANSYS/LS-DYNA, appropriate threshold value judging mechanism is designed to meet two items, one item is the deformation of threshold value rod is not enough to release sub-centrifugal slider when the speed is less than 60000r/min; the other item is deformation of threshold value rod can release sub-centrifugal slider when the speed is more than 60000r/min.
In this paper, a mechanical MEMS S&A device has been proposed. The size of the device is 10mm×13mm×0.5mm. The role of the lock-releasing mechanism is to amplify the moving distance of two times, so as to effectively guarantee the time of long-distance arming. Through establishing the three-dimensional model of without optimized lock-releasing mechanism, establishing the force and the parameters of locking-releasing mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory and establishing the finite element model by using ANSYS/LS-DYNA, appropriate lock-releasing mechanism is designed to meet two items, one item is that the lock-releasing rod locks the main centrifugal slider before sub-centrifugal slider movement in place; the other item is that sub-centrifugal slider will hit the lock-releasing rod when it movement in place, so the lock-releasing rod rotates around rotational positioning block and releases the main centrifugal slider.
According to the status of the lack of reliability data for MEMS fuze, this paper mainly studied the reliability factors of MEMS Safety and Arming System by using Dynamic simulation method. Through simulation analysis, the mainly reliability factors, weakness and potential failure modes of MEMS Safety and Arming System can be obtained, which can provide theory reference and data support for the design and application of the MEMS Safety and Arming System.
The failure mechanism of through silicon vias impacted by large current pulse is reported. A theoretical model has been built to describe how TSVs fails when impacted by large current pulse. The theoretical model is then solved by applying COMSOL Multiphysics and the weak points of the TSV have been pointed out. By applying the large current pulse generating and testing system, an experiment has been done to verify the theoretical model. The results show that although the TSVs may be broken down when impacted by large current pulse, it can still be function by using several TSVs in parallel.
The novel solid MEMS switch can improve the performance of the MEMS initiator, which will be more secure and reliable.While the leads of its package are weak under launch environment. Therefore, this paper aims to carry out multi-physical field reliability analysis, by using FEM simulation analysis, which can simulate the real launch environment better and obtain the reliability and potential failure modes of leads in impact, temperature, current coupling field, thus providing theory reference for the design and application of the novel solid MEMS switch.
This paper describes the stability research of MEMS spring used in fuze. The micro-spring in thickness dimension is thin, while the size of axial direction is larger, during compression the micro-spring is prone to suffering buckling and become unstable. In order to consider the extreme environments in launch, this paper aims to carry out buckling simulation in high or low temperature, by using FEM analysis. The effect of temperature load on the micro-spring buckling can be obtained. These researches can provide theory reference for the design applications and reliability analysis of micro-spring, and also lay the foundation for the response characteristics of the micro-scale elastic components under compressive force.
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