fieldid E-Thesis & Research สถาบันเทคโนโลยีไทย-ญี่ปุ่น
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บทคัดย่อ
The Design and Implementation of Weak Signal Detection Methods using Duffing Chaotic Oscillator : This thesis presents weak signal detection methods using Duffing chaotic oscillator. The dynamic characteristics and properties of Duffing chaotic oscillator under the detection mode are mathematically analyzed, including an existence of attractor, equilibrium points, Jacobian matrices, bifurcations, chaotic waveforms, and frequency-domain spectrums. As the precision of the system depend on the parameter threshold value still unsolved and a small variation of parameter value may cause a dramatically change in the chaotic system behavior, this thesis has contributed two major significant research outcomes, including parameter optimization and hardware implementation of the Duffing chaotic oscillator. The proposed parameter optimizations aim to achieve the parameter robustness for circuit operation under weak signal detection mode through the comparisons of Kaplan-Yorke conjecture that quantitatively measures the system complexity. The optimized parameters of Duffing equation has been found and employed for the circuit implementation. The circuit implementation of Duffing chaotic oscillator has also been proposed with minimal components with band-pass filtered output and current measurement circuit. The circuit could potentially measure weak signals under noisy conditions through the phase-plane observation in the changes of chaotic attractor. The proposed weak signal detection method can be used as an alternative to cost-effective weak signal detection systems in a variety of
ผู้แต่ง
Chiramathe Nami
ประเภทสิ่งพิมพ์
วิทยานิพนธ์ (MIM) 2012
เลขหน้า
85 p.
หัวเรื่อง
Engineering Technology--Thesis
หัวเรื่อง
Thai-Nichi Institute of Technology.Engineering Technology--Thesis
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