Two MRAC Designs for the MEMS-Based AC Voltage Reference Source

Farzanegan, Behzad; Niafar, Ehsan; Ranjbar, Ehsan; Suratgar, Amir Abolfazl

doi:10.1007/s40998-019-00205-7

Cited by 8 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, implementation of the proposed controller can be done via fuzzy tuning of the PID controller parameters without knowing bounds on noise. In the similar previous articles [10,34], the convergence-time of the states is longer in comparison with this work. The settling time (convergence) in the proposed controller is also a little shorter (faster) in comparison with [33].…”

Section: Introductionsupporting

confidence: 64%

“…In [34] conventional adaptive control and adaptive SMC were proposed and compared to manage some but not all the mentioned issues in MEMS TC control. Farzanegan et al [10] proposed Model Reference Adaptive Control (MRAC) for the MEMS TC using output feedback. Ranjbar et al [33] proposed an observer-based controller for the MEMS TC to cancel the requirement for measurement circuits of displacement and velocity of the movable capacitive plates.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of a fuzzy PID controller for a MEMS tunable capacitor for noise reduction in a voltage reference source

et al. 2021

Self Cite

View full text Add to dashboard Cite

This study presents a conventional Ziegler-Nichols (ZN) Proportional Integral Derivative (PID) controller, having reviewed the mathematical modeling of the Micro Electro Mechanical Systems (MEMS) Tunable Capacitors (TCs), and also proposes a fuzzy PID controller which demonstrates a better tracking performance in the presence of measurement noise, in comparison with conventional ZN-based PID controllers. Referring to importance and impact of this research, the proposed controller takes advantage of fuzzy control properties such as robustness against noise. TCs are responsible for regulating the reference voltage when integrated into Alternating Current (AC) Voltage Reference Sources (VRS). Capacitance regulation for tunable capacitors in VRS is carried out by modulating the distance of a movable plate. A successful modulation depends on maintaining the stability around the pull-in point. This distance regulation can be achieved by the proposed controller which guarantees the tracking performance of the movable plate in moving towards the pull-in point, and remaining in this critical position. The simulation results of the tracking performance and capacitance tuning are very promising, subjected to measurement noise. Article Highlights This article deals with MEMS tunable capacitor dynamics and modeling, considering measurement noise. It designs and applies fuzzy PID control system for regulating MEMS voltage reference output. This paper contributes to robustness increase in pull-in performance of the tunable capacitor.

show abstract

Section: Introductionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Design of a fuzzy PID controller for a MEMS tunable capacitor for noise reduction in a voltage reference source

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Actually, three estimators are embedded in our design: two for parameter estimation and one for state estimation. Contrary to [7,24], just velocity of the movable plate is assumed to be at the access. The simulation yields rise so persuasive.…”

Section: Introductionmentioning

confidence: 99%

Design of an adaptive sliding mode controller with a sliding mode Luenberger observer for the MEMS capacitive plates

Ranjbar

Suratgar

2020

SN Appl. Sci.

Self Cite

View full text Add to dashboard Cite

Uncertain parameters in a MEMS tunable capacitor, as one of the fundamental elements in a MEMS AC voltage reference source (VRS) structure, is an important issue for acquisition of a rigorous voltage in the VRS output. The output is mostly supposed to be destroyed by harmful disturbance and noise. Even though the manufacturers make attempts to build MEMS tunable capacitor with desired characteristics in thorough compliance with the initial major design, uncertainties in the parameters inescapably do exist in manufacturing process on the ground of deficiencies in various procedures. This paper mainly remarks an adaptive sliding mode controlling design with a sliding mode Luenberger observer and its application for a MEMS tunable capacitor. The control design is done considering matched and unmatched terms of uncertainties and disturbance. The advantageous outcome is that the VRS could be generating a stable precise regulated output voltage owing to correct distance adjustment of the capacitor charged plates. The design exploits the sliding mode observer to get rid of extra usage of plate position measurement in the control structure. The controller alleviates the system output of the matched and unmatched disturbance which could exist dynamically because of cross stiffness and damping in addition to other inertial and electrostatic disturbing forces. The matched uncertainties, such as stiffness and damping change, might appear due to variation in fabrication procedures or working condition. The simulation yields are satisfactory and depict a persuasive tracking performance as well as regulation about the pull-in point.

show abstract

“…The stiffness and damping factor may show an unexpected behaviour during the time of operation. Previous works on control of the capacitive plates such as [10,13,[27][28][29][30][31] assume that the parameters are unknown constants or vary so slowly, i.e. the time-derivative of the parameters are approximately considered zero.…”

Section: Introductionmentioning

confidence: 99%

“…(3) Unlike many other works such as [32][33][34][35][36][37], which have been concerned with tracking a sinusoidal displacement trajectory for the displacement of the MEMS movable capacitive plate, this paper addresses displacement control of the movable capacitive plate, regulating its motion about a fixed position. (4) This article deems uncertainty in the movable plate mass which has not been considered in previous works such as [24,29,30,38,39].…”

Section: Introductionmentioning

confidence: 99%

Robust adaptive sliding mode control of a MEMS tunable capacitor based on dead-zone method

2020

Self Cite

View full text Add to dashboard Cite

Uncertainty in parameters of a tunable Micro Electro Mechanical System (MEMS) capacitor, as the main component of AC Voltage Reference Source (VRS), is significant to obtain a precise output voltage unaffected by disturbance and noise. Although attempts are done to craft the capacitor with desired physical specification and improve accuracy of parameters, parametric uncertainties transpire in manufacturing due to micro-machining shortcomings. First off, this paper remarks design of a Robust Adaptive Sliding Mode Controller (RASMC) and its application for the MEMS AC VRS for the first time so that it can produce a stable precise regulated output at presence of uncertainties and disturbance. Secondly, it makes a comparison between the proposed novel controller and our previously designed ASMC. The comparison reassures one of robustness at exacerbating conditions in the tunable capacitor dynamics. The novelty is employment of the dead zone-based ASMC to manage parametric uncertainty and disturbance in the MEMS tunable capacitor. It also contributes to adaptive sliding mode control of the dynamics with stiffness and damping coefficients, which are non-slowly-varying time-dependent parameters, approaching dead-zone method. Uncertainty in the plate mass besides bounded time-variant uncertainty in stiffness and damping are considered. These restrictions were not deemed in the previous design.

show abstract

Two MRAC Designs for the MEMS-Based AC Voltage Reference Source

Cited by 8 publications

References 19 publications

Design of a fuzzy PID controller for a MEMS tunable capacitor for noise reduction in a voltage reference source

Design of a fuzzy PID controller for a MEMS tunable capacitor for noise reduction in a voltage reference source

Design of an adaptive sliding mode controller with a sliding mode Luenberger observer for the MEMS capacitive plates

Robust adaptive sliding mode control of a MEMS tunable capacitor based on dead-zone method

Contact Info

Product

Resources

About