Influence of external shocks and internal noises on the resonant frequency tracking system in Coriolis vibratory gyroscope

According to the change of resistivity and magnetic permeability of iron load which will influence the resonance frequency in the process of induction heating, this paper presents a frequency tracking system based on the 74HC4046. It can control the output frequency of the power supply in real time, and make the power output frequency to trace the resonance frequency of load. This paper also analyses the phase compensation of the control system, and proposes a new way of phase compensation. The corresponding simulation experiment is done finally. It provides the theory basis to analyze and design an inverter power supply.

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Analysis of a Natural Frequency Tracking System for MEMS Fatigue Testing

10.1115/imece2001/mems-23849 ◽

2001 ◽

Author(s):

Xiaotian Sun ◽

Roberto Horowitz ◽

Kyriakos Komvopoulos

Keyword(s):

Control System ◽

Natural Frequency ◽

Averaging Method ◽

Fatigue Testing ◽

Tracking System ◽

Frequency Tracking ◽

At Resonance ◽

Mems Resonator ◽

Control Gain ◽

Good Agreement

Abstract A nonlinear control system that can track the natural frequency of a MEMS resonator was developed in this study. Due to the evolution of fatigue damage, the natural frequency of the resonator decreases. To maintain the device at resonance, a phase-locked loop system is used to track the frequency decay and adjust the driving force accordingly. A model for the control system is introduced and the system behavior is analyzed using an averaging method. A quantitative criterion for selecting the control gain to achieve stability is derived from the analysis. Simulation results are shown to be in good agreement with the prediction of the theoretical analysis.

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IMPROVED PERFORMANCE PHASE DETECTOR FOR MULTIPLICATIVE SECOND-ORDER PLL SYSTEMS USING DEFORMED ALGEBRA

Journal of Circuits System and Computers ◽

10.1142/s021812661450008x ◽

2014 ◽

Vol 23 (01) ◽

pp. 1450008

Author(s):

MARCONI O. DE ALMEIDA ◽

EDUARDO T. F. SANTOS ◽

JOSÉ M. ARAÚJO

Keyword(s):

Control Systems ◽

Tracking System ◽

Phase Detector ◽

Phase Locked Loops ◽

Frequency Tracking ◽

Maximum Likelihood Approach ◽

Multiplicative Type ◽

Likelihood Approach ◽

Improved Performance ◽

And Control

Phase-locked loops (PLL) is a phase and/or frequency tracking system, widely used in communication and control systems. The sinusoidal multiplicative type PLL still remains a recurrent model, due the fact that its derivation is originated from the maximum likelihood approach. In this note, it is showed as a generalized product, called q-product, which can be used to implement the phase detector and improve some important parameters of the PLL system, as the block linearity and pull-in characteristics. Numerical examples are presented in order to illustrate the proposal.

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Bidirectional Resonant Frequency Tracking for CLLC Converters Based On Voltage Falling Edges

10.1109/ecce47101.2021.9594977 ◽

2021 ◽

Author(s):

Jun Min ◽

Martin Ordonez

Keyword(s):

Resonant Frequency ◽

Frequency Tracking

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A Resonant Frequency Tracking Technique for LLC Converters Based DC Transformers

IEEE Journal of Emerging and Selected Topics in Industrial Electronics ◽

10.1109/jestie.2021.3101948 ◽

2021 ◽

pp. 1-1

Author(s):

Yuqi Wei ◽

Quanming Luo ◽

Alan Mantooth

Keyword(s):

Resonant Frequency ◽

Frequency Tracking ◽

Tracking Technique

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Frequency-Tracking Algorithm Based on SOGI-FLL for Wireless Power Transfer System to Operate ZPA Region

Electronics ◽

10.3390/electronics9081303 ◽

2020 ◽

Vol 9 (8) ◽

pp. 1303

Author(s):

Do-Hyun Kim ◽

Min-Soo Kim ◽

Hee-Je Kim

Keyword(s):

Resonant Frequency ◽

Wireless Power Transfer ◽

Tracking Algorithm ◽

Physical Contact ◽

Switching Frequency ◽

Power Transfer ◽

Wireless Power ◽

Coupling Condition ◽

Frequency Tracking ◽

Load Variation

The wireless power transfer (WPT) system has attracted attention for energy transmission without physical contact. However, a WPT system has low coupling condition because of a big air gap between transmitter and receiver coils. The low coupling condition has a high leakage inductance. To overcome this problem, we design a proposed system for WPT using series-series (S-S) topology of one resonant circuit. To obtain the higher efficiency power conversion of the WPT system, it has to operate the resonant frequency in the zero phase angle (ZPA) point even under mutual coefficient and load variation. Therefore, we propose the resonant frequency tracking algorithm to operate ZPA point based on the second order generalized integrator-frequency locked loop (SOGI-FLL) method. This proposed frequency-tracking algorithm can estimate ZPA point by changing switching frequency. We can reduce the switching loss with this proposed algorithm and improve the low conversion efficiency of the WPT system. The performance of the proposed frequency-tracking algorithm is automatically verified through various coupling coefficients and the load variation.

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