Parameter selection for reducing line spectrum of Duffing system
1.College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, China; 2. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China; 3.China Ship Design and Development Center, Wuhan, Hubei 430026, China
Abstract：To determine the parameter combination for reducing the line spectrum energy value of Duffing system, based on a single degree of freedom vibration Duffing system, fourthorder RungeKutta method simulation was used to analyze the output characteristics of linear systems and nonlinear systems. The effects of damping and nonlinear parameters on system performance were analyzed to determine system parameters. In the conditions of fixed parameters system, the external cycle control method of excitation power was selected to control system output in practical applications, and the haotic area parameters were determined by Lyapunov exponent diagram in the system outputs. The system output size of Lyapunov exponent was used to determine the chaos strength of selected system. The results show that the decline of line spectrum can be realized by selecting parameters.
2015, Vol. 36 
