为及时向切换控制提供线路电流同步信号，提出了一种预测电流过零的方法。
To provide synchronization signal of line current for switching control in time, a method to forecast the crossover point of the current was given.
分析表明：最优策略实质上是以零控脱靶作为误差信号的反馈控制。
Our mathematical analysis shows that the optimal strategy is actually a feedback control that takes zero -effect miss as error signal.
证明了自适应控制系统的所有信号全局一致有界，调节误差渐近收敛到零。
It is proved that all the signals in the adaptive control system are globally uniformly bounded, and the regulation error converges to zero asymptotically.
该方法以电网电压为同步信号，在电网电压信号的过零点采样直流侧电容电压，并通过周期离散控制可以获得负荷电流有功分量。
The new control way can realize linear control for DC-bus voltage and get the fundamental component of the load current synchronously with a little of calculation.
零售商业景气波动的信号控制系统，通过一组指示灯信号系统来监测、调控零售商业景气运行的过程。
Boom fluctuation signal control system of retail commerce monitors and regulates the boom process of retail commerce by using a group of red, yellow and green lamps.
由分析可见：利用实际电路控制信号之间的逻辑关系获得过零信号简洁、可靠。
Indirect detecting is achieved by using the logic relationship between control signals, which is simple and reliable.
所设计的控制器能保证输出跟踪误差收敛到零的任意小邻域内，且所有信号全局有界。
The proposed controller can assure that not only the output tracking error converges to an any small neighborhood of zero but all the signals are global bounded.
振荡控制是指通过引入零均值的高频振荡信号来改善系统动态特性的方法。
Vibrational control is referred to the effect of changing the properties of dynamic systems caused by introduction of high_frequency vibrations with zero mean value.
该方法将控制器的设计转化为零相移低通数字滤波器的设计问题，借助于数字信号处理的理论和工具直接得到所需的控制器参数。
A repetitive controller can be obtained by designing a zero phase shift low pass filter. With the help of digital signal processing and software tools, it is easy to design a satisfactory controller.
放大器地输出(电流)由输入信号控制，所有零输入信号，电流输出也是零。
The output of the amplifier (electrical current) is controlled by the input signal so with zero input the output current is also zero.
放大器地输出(电流)由输入信号控制，所有零输入信号，电流输出也是零。
The output of the amplifier (electrical current) is controlled by the input signal so with zero input the output current is also zero.
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