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Ananda Natarajan, R.
- Analytical Modelling of Low Pressure Single Boss Sculptured Diaphragm and its Sensitivity Enhancement
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Authors
Affiliations
1 Department of Electronics and Instrumentation Engineering, Pondicherry Engineering College, IN
2 Department of Electronics Engineering, Pondicherry University, IN
1 Department of Electronics and Instrumentation Engineering, Pondicherry Engineering College, IN
2 Department of Electronics Engineering, Pondicherry University, IN
Source
ICTACT Journal on Microelectronics, Vol 1, No 3 (2015), Pagination: 124-130Abstract
The low pressure is measured by using thin Sculptured diaphragm using micro system fabrication technology. The thickness of this diaphragm is reduced to improve sensitivity is achieved by boss like structure to increase the stiffness and reduce nonlinear deflection. This paper brings out the optimum design for single boss sculptured diaphragm. The burst pressure thickness is used to achieve the maximum possible sensitivity. The maximum stress regions identified for the proper placement of four polysilicon piezoresistors which are wired in the form of wheat stone bridge arrangement to estimate the electrical output. The results are obtained using Intellisuite MEMS CAD design tool. Mathematical modelling of single boss sculptured diaphragm results were compared with simulated results. Further the enhancement of sensitivity is analyzed using nonuniform thickness diaphragm and SOI technique. In this paper the low pressure analyzed in the range of (0-1000Pa). The simulation results indicate that the single boss square sculptured diaphragm with 0.9μm yields the higher voltage sensitivity, acceptable linearity with Small Scale Deflection.Keywords
Burst Pressure, Shape, Stress, Single Boss Sculptured Diaphragm, Nonuniform Thickness Diaphragm and SOI.
References
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- D. Sindhanaiselvi, R. Ananda Natarajan and T. Shanmuganantham, “Performance Analysis of Sculptured Diaphragm for Low Pressure MEMS Sensors”, Applied Mechanics and Materials, Vol. 592-594, pp. 2193-2198, 2014.
- D. Sindhanaiselvi, R. Ananda Natarajan and T. Shanmuganantham, “Design and Optimization of Low Pressure Sculptured Diaphragm with Burst Pressure, Stress Analysis and its Enhancement”, International Journal of Applied Engineering Research, Vol. 10, No.24, pp. 21075-21081, 2015.
- Estimation of Multiple Transient Actuator Faults Using Augmented Error Technique
Abstract Views :197 |
PDF Views:2
Authors
Affiliations
1 Department of EIE, Pondicherry Engineering College, Pondicherry, IN
2 Department of EIE, Pondicherry Engineering College, Pondicherry, IN
1 Department of EIE, Pondicherry Engineering College, Pondicherry, IN
2 Department of EIE, Pondicherry Engineering College, Pondicherry, IN
Source
Automation and Autonomous Systems, Vol 5, No 4 (2013), Pagination: 155-161Abstract
A fault diagnosis scheme for nonlinear uncertain dynamic systems with both abrupt and incipient faults is discussed. An active fault approach is designed that utilizes adaptive laws of augmented error technique in such a way that accounts for matching uncertainties and the occurrence of actuator faults. The main idea is designing the robust fault diagnosis scheme that guarantee stability of the system in the presence of faults. Using the augmented error technique from model reference adaptive control, an observation error model is formulated to give an adaptive diagnostic algorithm which produces the estimate of actuator faults. Changes in the system due to faults are modelled as unknown nonlinear functions. An occurred fault is isolated if the residual associated with the observer remains below its corresponding adaptive threshold, while at least one of the components of the residual associated with all other estimators exceeds its threshold at some finite time. Unknown Input Observer (UIO) is an estimator which is decoupled from the unknown inputs (certain disturbances, or faults) that may be acting on the system. A key design issue of the proposed fault isolation scheme is the derivation of adaptive residual thresholds associated with observer. The simulation result indicate that the proposed algorithm is more realistic, in the sense that better decoupling properties can be assured without knowledge about unknown inputs, and it is potentially useful in the development of a fault-tolerant control system.
Keywords
Robust Fault Diagnosis, Unknown Input Observer, Augmented Error Technique.- Comparative Study on Different IMC based Controller for a Nonlinear pH Neutralization Process
Abstract Views :193 |
PDF Views:2
Authors
Affiliations
1 Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Pondicherry, IN
2 Department of Electronics and Instrumentation Engineering, Pondicherry Engineering College, Pondicherry, IN
1 Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Pondicherry, IN
2 Department of Electronics and Instrumentation Engineering, Pondicherry Engineering College, Pondicherry, IN