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• W2570308639 abstract "An adaptive control method that seeks the un- known resonant frequency of a load and drives it at its resonant frequency to achieve optimal performance is proposed and investigated. The method is based on estimating the derivative of the average power delivered to the load with respect to the driving frequency and using this estimate to adaptively control the driving frequency. The estimate of the derivative of the average power is obtained by sinusoidally perturbing the driving frequency and synchronously demodulating the average power delivered to the load. Assuming that the driving frequency is sufficiently large compared to the amplitude of sinusoidal perturbation, a nonlinear model that accurately pre- dicts the performance of the resonance seeking control system is developed. This developed model is subsequently linearized to obtain a linear time-invariant model that facilitates both analysis and design of the resonance seeking control system. Based on the developed linear time-invariant model, guidelines for designing the resonance seeking control system are also provided. The results are illustrated by several examples. Index Terms— Maximum power transfer, resonant frequency tuning, adaptive control. loads and plasma processing loads) the former approach is more feasible while in some other applications (microelec- tromechanical gyroscopes, cavity resonators, cyclotrons and bandpass wireless communication loads) the latter approach is more feasible. The resonance seeking control problem has received sig- ni›cant attention recently in the contexts of the speci›c applications listed above. When the model of the load is either a series or parallel RLC circuit, the phase of its impedance or admittance function is locally odd about the resonant frequency and its value is 0 rad at the resonant frequency. Thus, for such loads, the phase characteristic of its impedance or admittance function measured by a phase detector can be used for resonance seeking control purpose. Three adaptive resonance seeking control methods for such loads that exploits this idea have been investigated in our previous work (21)n(23). In many practical cases, however, the order of the load is often inherently higher than two. In these situations, the phase detector based resonance seeking control method is usually inadequate. Therefore, a method that can be used to track the resonant frequency of a possibly" @default.
• W2570308639 created "2017-01-13" @default.
• W2570308639 creator A5057370520 @default.
• W2570308639 date "2005-01-01" @default.
• W2570308639 modified "2023-09-27" @default.
• W2570308639 title "Resonance Seeking Control" @default.
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