Analysis and Design of A New Micro Jerk Sensor with Viscous Coupling

2003 ◽  
Vol 15 (6) ◽  
pp. 582-587 ◽  
Author(s):  
Motohiro Fujiyoshi ◽  
◽  
Yutaka Nonomura ◽  
Fumihito Arai ◽  
Toshio Fukuda ◽  
...  
Keyword(s):  
Mechanical System ◽  
Degrees Of Freedom ◽  
Micro Electro Mechanical System ◽  
New Method ◽  
Mass Ratio ◽  
Viscous Coupling ◽  
Position Change ◽  
Analysis And Design ◽  
Simulation Results ◽  
Spring Coefficient

A new method for jerk detection (derivative of acceleration) is proposed. By using a 2 degrees of freedom (DOF) model with viscous coupling, we measure jerk directly as a position change in mass without differential circuit. Analysis by numerical formulas show the principle of the proposed jerk detection and simulation results show suitable parameters such as viscosity, mass ratio, and spring coefficient ratio for jerk detection. We also propose a micro jerk sensor based on the micro electro mechanical system (MEMS). Results of analysis show that the microstructure is suitable for the proposed viscous coupling.

scholarly journals DEVELOPMENT OF A NEW STRUCTURE OF 3-DOF PIEZORESISTIVE ACCELEROMETER TO ENHANCE THE SENSITIVITY

2010 ◽  
Vol 13 (2) ◽  
pp. 57-65
Author(s):  
Tan Duc Tran
Keyword(s):  
Mechanical System ◽  
Degrees Of Freedom ◽  
Micro Electro Mechanical System ◽  
Ansys Software ◽  
Mems Sensors ◽  
Mems Technology ◽  
Mems Device ◽  
Three Degrees Of Freedom

Nowadays, the Micro Electro Mechanical System (MEMS) technology’ has been achieved great developments. Accelerometer is one kind of the most popular MEMS sensors due to it's widely applications. In order to fabricate any MEMS device, the design and simulation have been considered seriously. This paper presents a new design of the three degrees of freedom piezoresistive accelerometer to improve the sensitivity, urgent demand from the reality. The ANSYS software was utilized to design, simulate and evaluate the advantages of this new structure compared to other sensors fabricated previously.

scholarly journals Testing of a MEMS Dynamic Inclinometer Using the Stewart Platform

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4233 ◽  
Author(s):  
Zhihua Liu ◽  
Chenguang Cai ◽  
Ming Yang ◽  
Ying Zhang
Keyword(s):  
Mechanical System ◽  
Real Time ◽  
Degrees Of Freedom ◽  
Cross Coupling ◽  
Micro Electro Mechanical System ◽  
Stewart Platform ◽  
Forward Kinematics ◽  
Six Degrees Of Freedom ◽  
Position And Orientation ◽  
The Cross

The micro-electro-mechanical system (MEMS) dynamic inclinometer integrates a tri-axis gyroscope and a tri-axis accelerometer for real-time tilt measurement. The Stewart platform has the ability to generate six degrees of freedom of spatial orbits. The method of applying spatial orbits to the testing of MEMS inclinometers is investigated. Inverse and forward kinematics are analyzed for controlling and measuring the position and orientation of the Stewart platform. The Stewart platform is controlled to generate a conical motion, based on which the sensitivities of the gyroscope, accelerometer, and tilt sensing are determined. Spatial positional orbits are also generated in order to obtain the tilt angles caused by the cross-coupling influence. The experiment is conducted to show that the tested amplitude frequency deviations of the gyroscope and tilt sensing sensitivities between the Stewart platform and the traditional rotator are less than 0.2 dB and 0.1 dB, respectively.

Design and Analysis on Symmetric MEMS Inductor

2015 ◽  
Vol 815 ◽  
pp. 364-368
Author(s):  
N. Khalid ◽  
N.I.M. Nor ◽  
W.M.W. Norhaimi ◽  
Zaliman Sauli ◽  
Vithyacharan Retnasamy
Keyword(s):  
Modeling And Simulation ◽  
Mechanical System ◽  
Computer Aided Design ◽  
Micro Electro Mechanical System ◽  
Q Factor ◽  
High Q ◽  
Computer Aided ◽  
Simulation Results ◽  
Conductor Strip ◽  
Aided Design

This paper presents the design and analysis of new proposed topology micro-electro-mechanical system (MEMS) inductor. This new symmetric MEMS inductor is designed to reduce the total length of the conductor strip and hence reduce the resistance of the metal tracks. This results significant increases in the quality (Q) factor of the inductor. In this paper, the MEMS inductor is designed using CoventorWare®, which is powerful software for MEMS computer aided design (CAD), modeling and simulation. Results indicate that new symmetric inductor topology has thehighest Q-factor and it hasbeenimproved bytwo times compared to circular inductor. The analysis revealed that area of the symmetric inductor has reduced by37.5% compared to the circular inductor. Result has proved that the reduction of length of the conductor strip has reduced the resistance of the metal tracks and results in a high Q-factor inductor.

A MEMS Fluid Density Sensor Based on Trapezoidal Cantilever

2011 ◽  
Vol 483 ◽  
pp. 374-377
Author(s):  
Li Bo Zhao ◽  
En Ze Huang ◽  
Gui Ming Zhang ◽  
Yu Long Zhao ◽  
Xiao Po Wang ◽  
...  
Keyword(s):  
Mechanical System ◽  
Micro Electro Mechanical System ◽  
Fluid Density ◽  
System Technology ◽  
Ansys Software ◽  
Cantilever Structure ◽  
Simulation Results ◽  
Optimum Solution

A kind of fluid density sensor based on MEMS (Micro-Electro-Mechanical-System) technology is introduced with trapezoidal cantilever structure. The rectangular cantilever and trapezoidal cantilever, based on the same parameters, are analyzed. The simulation results show that the sensitivity of trapezoidal cantilever is higher than that of rectangular cantilever. Four different sizes of trapezoidal cantilever are analyzed by modal and harmonic simulation with ANSYS Software, the optimum solution will be obtained from simulation results.

scholarly journals 3D Simulation-Based Acoustic Wave Resonator Analysis and Validation Using Novel Finite Element Method Software

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2715
Author(s):  
Ruth Yadira Vidana Morales ◽  
Susana Ortega Cisneros ◽  
Jose Rodrigo Camacho Perez ◽  
Federico Sandoval Ibarra ◽  
Ricardo Casas Carrillo
Keyword(s):  
Finite Element ◽  
High Performance ◽  
Cloud Services ◽  
3D Simulation ◽  
3D Simulations ◽  
Acoustic Resonators ◽  
Analysis And Design ◽  
Wave Resonator ◽  
Film Bulk ◽  
Simulation Results

This work illustrates the analysis of Film Bulk Acoustic Resonators (FBAR) using 3D Finite Element (FEM) simulations with the software OnScale in order to predict and improve resonator performance and quality before manufacturing. This kind of analysis minimizes manufacturing cycles by reducing design time with 3D simulations running on High-Performance Computing (HPC) cloud services. It also enables the identification of manufacturing effects on device performance. The simulation results are compared and validated with a manufactured FBAR device, previously reported, to further highlight the usefulness and advantages of the 3D simulations-based design process. In the 3D simulation results, some analysis challenges, like boundary condition definitions, mesh tuning, loss source tracing, and device quality estimations, were studied. Hence, it is possible to highlight that modern FEM solvers, like OnScale enable unprecedented FBAR analysis and design optimization.

scholarly journals An automated system analysis and design tool for spacecrafts ceas space journal

2021 ◽  
Author(s):  
Manfred Ehresmann ◽  
Georg Herdrich ◽  
Stefanos Fasoulas
Keyword(s):  
Evolutionary Algorithms ◽  
Evolutionary Algorithm ◽  
Degrees Of Freedom ◽  
System Analysis ◽  
Propulsion System ◽  
Optimal System ◽  
Automated System ◽  
Processing Unit ◽  
Data Set ◽  
Analysis And Design

AbstractIn this paper, a generic full-system estimation software tool is introduced and applied to a data set of actual flight missions to derive a heuristic for system composition for mass and power ratios of considered sub-systems. The capability of evolutionary algorithms to analyse and effectively design spacecraft (sub-)systems is shown. After deriving top-level estimates for each spacecraft sub-system based on heuristic heritage data, a detailed component-based system analysis follows. Various degrees of freedom exist for a hardware-based sub-system design; these are to be resolved via an evolutionary algorithm to determine an optimal system configuration. A propulsion system implementation for a small satellite test case will serve as a reference example of the implemented algorithm application. The propulsion system includes thruster, power processing unit, tank, propellant and general power supply system masses and power consumptions. Relevant performance parameters such as desired thrust, effective exhaust velocity, utilised propellant, and the propulsion type are considered as degrees of freedom. An evolutionary algorithm is applied to the propulsion system scaling model to demonstrate that such evolutionary algorithms are capable of bypassing complex multidimensional design optimisation problems. An evolutionary algorithm is an algorithm that uses a heuristic to change input parameters and a defined selection criterion (e.g., mass fraction of the system) on an optimisation function to refine solutions successively. With sufficient generations and, thereby, iterations of design points, local optima are determined. Using mitigation methods and a sufficient number of seed points, a global optimal system configurations can be found.

scholarly journals High-performance magneto-rheological clutches for direct-drive actuation: Design and development

2021 ◽  
pp. 1045389X2110069
Author(s):  
Sergey Pisetskiy ◽  
Mehrdad Kermani
Keyword(s):  
High Performance ◽  
Degrees Of Freedom ◽  
Dynamic Range ◽  
Complete Analysis ◽  
Mass Ratio ◽  
Direct Drive ◽  
Element Analysis ◽  
Prototype Development ◽  
Magneto Rheological ◽  
Hall Sensors

This paper presents an improved design, complete analysis, and prototype development of high torque-to-mass ratio Magneto-Rheological (MR) clutches. The proposed MR clutches are intended as the main actuation mechanism of a robotic manipulator with five degrees of freedom. Multiple steps to increase the toque-to-mass ratio of the clutch are evaluated and implemented in one design. First, we focus on the Hall sensors’ configuration. Our proposed MR clutches feature embedded Hall sensors for the indirect torque measurement. A new arrangement of the sensors with no effect on the magnetic reluctance of the clutch is presented. Second, we improve the magnetization of the MR clutch. We utilize a new hybrid design that features a combination of an electromagnetic coil and a permanent magnet for improved torque-to-mass ratio. Third, the gap size reduction in the hybrid MR clutch is introduced and the effect of such reduction on maximum torque and the dynamic range of MR clutch is investigated. Finally, the design for a pair of MR clutches with a shared magnetic core for antagonistic actuation of the robot joint is presented and experimentally validated. The details of each approach are discussed and the results of the finite element analysis are used to highlight the required engineering steps and to demonstrate the improvements achieved. Using the proposed design, several prototypes of the MR clutch with various torque capacities ranging from 15 to 200 N·m are developed, assembled, and tested. The experimental results demonstrate the performance of the proposed design and validate the accuracy of the analysis used for the development.

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