Hiển thị các bài đăng có nhãn oscillations. Hiển thị tất cả bài đăng
Hiển thị các bài đăng có nhãn oscillations. Hiển thị tất cả bài đăng

Chủ Nhật, 8 tháng 2, 2015

Truly Nonlinear Oscillations

Truly Nonlinear Oscillations



This unique book provides a concise presentation of many of the fundamental strategies for calculating approximations to the oscillatory solutions of truly nonlinear (TNL) oscillator equations. The volume gives a general overview of the author’s work on harmonic balance, iteration and combined linearization-averaging methods. However, full discussions are also presented on parameter expansion procedures and a first-order averaging technique for TNL oscillators. The calculational basis of each method is clarified by applying them to a set of standard TNL oscillator equations. This allows a dire.




Thứ Năm, 1 tháng 1, 2015

Power System Oscillations

Power System Oscillations



Power System Oscillations deals with the analysis and control of low frequency oscillations in the 0.2-3 Hz range, which are a characteristic of interconnected power systems. Small variations in system load excite the oscillations, which must be damped effectively to maintain secure and stable system operation. No warning is given for the occurrence of growing oscillations caused by oscillatory instability, since a change in the system’s operating condition may cause the transition from stable to unstable. If not limited by nonlinearities, unstable oscillations may lead to rapid system collapse. Thus, it is difficult for operators to intervene manually to restore the system’s stability. It follows that it is important to analyze a system’s oscillatory behavior in order to understand the system’s limits. If the limits imposed by oscillatory instability are too low, they may be increased by the installation of special stabilizing controls.