公开(公告)号：US3890078A

公开(公告)日：1975-06-17

申请号：US22210372

申请日：1972-01-31

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： STRAUMANIS MARIS A

IPC: B29B7/00 ,  B29C47/00 ,  B29C47/10 ,  B29C47/38 ,  B29C47/92 ,  G05D5/03 ,  B29F3/06

CPC classification number: B29C47/92 ,  B29C47/0009 ,  B29C47/0021 ,  B29C2947/92019 ,  B29C2947/92095 ,  B29C2947/92104 ,  B29C2947/92133 ,  B29C2947/92152 ,  B29C2947/9218 ,  B29C2947/92295 ,  B29C2947/9239 ,  B29C2947/92409 ,  B29C2947/92438 ,  B29C2947/9258 ,  B29C2947/9259 ,  B29C2947/926 ,  B29C2947/92933 ,  B29C2947/92952 ,  G05D5/03

Abstract: Thickness of a sheet produced by an extruder and throughput of the sheet are controlled so that sheet thickness and throughput controls do not interact with each other. In one embodiment, throughput is controlled by the take-away speed of the sheet from the extruder whereby the take-away speed is responsive to a takeaway error derived by comparing a take-away speed measurement with a set point therefor. Speed of a screw feeding material to the extruder is controlled in response to the throughput error signal and an indication of the error between the sheet thickness and a set point value therefor. In a second embodiment, throughput is determined by the screw speed in response to an error between screw speed set point and measured screw speed. Sheet take-away speed, i.e., line speed, is determined in response to the throughput error signal and an error signal derived by comparing measured sheet thickness and a sheet thickness set point.

Abstract translation: 由挤出机生产的片材的厚度和片材的生产量被控制，使得片材厚度和生产量控制器彼此不相互作用。 在一个实施例中，通过片材从挤出机的取出速度来控制通过量，由此，取出速度响应于将取出速度测量与其设定点进行比较而导出的外推误差。 响应于通过量误差信号和板厚度与其设定值之间的误差的指示来控制螺杆进料到挤出机的速度。 在第二实施例中，响应于螺杆转速设定点和测量的螺杆速度之间的误差，通过螺杆速度来确定通过量。 响应于吞吐量误差信号和通过比较测量的片材厚度和片材厚度设定点而导出的误差信号来确定薄片取出速度，即线速度。

公开(公告)号：US3875383A

公开(公告)日：1975-04-01

申请号：US34603473

申请日：1973-03-29

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： SOMERVILLE GERALD H ,  STRAUMANIS MARIS A

IPC: G05B15/02 ,  G05D5/03 ,  G07C3/14 ,  G06G7/66 ,  G05B13/02

CPC classification number: G07C3/14 ,  G05B15/02 ,  G05D5/03 ,  Y10S131/905

Abstract: A system for controlling the setpoint for the average value of a material property includes a means for monitoring the property to derive a first signal indicative of the property values. A computer means responds to the first signal to derive second and third signals respectively indicative of the spread of values of the first signal over relatively short and long time intervals. In response to the spread of values indicated by the second signal exceeding a first statistically expected value, based on the number of property values derived from the monitoring equipment over the relatively short time interval, a flag signal is derived. A further flag signal is derived in response to the spread of values indicated by the third signal exceeding a second statistically expected value based on the number of property values derived over a longer time interval. The second statistically expected value changes as the number of samples of the property increases from the time when a particular long term computation cycle began. In response to either of the flag signals being derived, the computation cycles are re-initiated and a change is made in the average value setpoint in response to the difference signal which resulted in the derivation of the flag signal.

Abstract translation: 用于控制材料属性的平均值的设定值的系统包括用于监视该属性以导出指示该属性值的第一信号的装置。 计算机装置响应于第一信号以得到第二和第三信号，分别指示在相对较短和长的时间间隔内第一信号的值的扩展。 响应于由第二信号指示的值超过第一统计预期值的扩展，基于在相对短的时间间隔内从监视设备导出的属性值的数量，导出标志信号。 基于在较长时间间隔上导出的属性值的数量，响应于由第三信号指示的值超过第二统计期望值的值的推导导出另外的标志信号。 第二个统计预期值随着特定长期计算周期开始时的财产样本数量的增加而变化。 响应于导出的任何一个标志信号，重新启动计算周期，并且响应于导致标志信号的导出的差分信号而在平均值设定点中进行改变。