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    • 9. 发明授权
    • Method of and an apparatus for generating a pulse train
    • 用于产生脉冲串的方法和装置
    • US4785223A
    • 1988-11-15
    • US816045
    • 1986-01-03
    • Dietrich HankFriedrich Richter
    • Dietrich HankFriedrich Richter
    • B41F13/02B65H23/188G05B21/02G05D15/01
    • B41F13/025B65H23/1882G05B21/02G05D15/01B65H2557/2644
    • A method of generating a sampling signal succesion for use in a control system utilizing pulse-length modulated control signals, especially for controlling the tension or position of a continuously advancing web, such as in rotary printing machines, includes sampling and storing an error signal after a time interval having a duration approximately equal to an equalization time of the controlled system and commencing with the termination of a preceding adjustment step while the control system is out of operation, generating a binary signal of a length in time which is proportional to the error signal, sampling and storing a sum of the error signal and a deviation error signal during an additional time interval considerably shorter than the time constant of the controlled system, and extending the binary signal proportionally to the deviation control signal. An arrangement for performing the method includes two sampling devices connected in parallel to the output of a comparator and each including a series arrangement of a normally open contact, a storage unit, and a normally closed contact, the output of one sampling device being connected directly to a first input of a summing device and through another contact of the other sampling device to a second input of the summing device, while the output of the other sampling device is connected directly to a third input of the summing device. The output of the summing device is connected to inputs of a pulse-length modulator and a signum-forming element, whose outputs are connected to a control device for a drive.
    • 一种采用脉冲长度调制控制信号的控制系统中产生采样信号成功的方法,特别是用于控制连续行进的卷筒纸(如旋转印刷机器)的张力或位置,包括采样和存储误差信号。 具有大约等于受控系统的均衡时间的持续时间的时间间隔,并且在控制系统不工作时从终止先前的调整步骤开始,产生与误差成比例的时间长度的二进制信号 在比受控系统的时间常数短的附加时间间隔期间,将误差信号和偏差误差信号之和信号,采样和存储,并将二进制信号成比例地延伸到偏差控制信号。 用于执行该方法的装置包括与比较器的输出并联连接的两个采样装置,每个采样装置包括常开触点,存储单元和常闭触点的串联装置,一个采样装置的输出直接连接 到另一采样装置的第一输入端,并通过另一个采样装置的另一个触点与求和装置的第二输入端相连,而另一采样装置的输出端直接连接到求和装置的第三输入端。 求和装置的输出连接到脉冲长度调制器和信号形成元件的输入端,其输出端连接到用于驱动器的控制装置。