在线调节步长改变电压收敛速度，设计锁相控制电路，自动同步跟踪电网频率和相位。
The online variable step can also regulate the voltage convergence rate, and the phase-locked control circuit is designed to synchronously trace frequency and phase of power grid automatically.
该算法对采样频率无严格限制，最终可确保系统闭环半全局一致有界收敛。
The algorithmic relaxes the strict limit on sample frequency, and can guarantee SGUUB(semi-global uniform ultimate boundedness) of the closed-loop system.
构造了一种以结构最低固有频率作为约束频率的结构最轻重量设计方法，并建立了相应的迭代公式和收敛准则。
A method of minimum weight design with the lowest frequency as the constraint frequency is provided, and the iterative formulas and convergence criteria are found.
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