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CSME 2023/08
Volume 44 No.4
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321-330
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Complexity and Suppressing Chaos in Automotive Electronic Throttle System
Shun-Chang Changa
aDepartment of Mechanical and Automation Engineering, Da-Yeh University, No. 168, University Road, Dacun, Changhua 51591, TAIWAN (R.O.C.)
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Abstract:
The main objective of this study is to explore the complex nonlinear dynamics and chaos control of an automotive electronic throttle system. The effects of varying the parameter values of an electronic throttle system can be observed in bifurcation diagrams. Various periodic solutions and nonlinear phenomena can be expressed using various numerical methods, such as time responses, phase portraits, Poincaré maps, and frequency spectra. It is shown that electronic throttle systems can undergo a cascade of period-doubling bifurcations prior to the onset of chaos. Estimates of the largest Lyapunov exponent based on synchronization properties reveal the occurrence of chatter vibrations, which is indicative of chaotic motion. In addition, state feedback control and dither signal control are applied to suppress the chaotic behavior of electronic throttle systems. Numerical simulation results demonstrate the effectiveness of these proposed control approaches.
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Keywords: throttle, period-doubling bifurcation, chaos, Lyapunov exponent, state feedback, dither
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©
2023
CSME , ISSN 0257-9731
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