Siemens Aktiengesellschaft

Edmund Linzenkirchner

Herbert Grieb

Karl-Heinz Kirchberg

Bernd-Markus Pfeiffer

Alf Püttmer

Udo Doebrich

Roland Heidel

Robert Schwab

Kurt Ewe

Ingrid Maes

Erich Merz

Hans-Peter Preuss

The invention relates to the online regulation of a batch process in a bioreactor. According to the invention, spectra of the actual charge in the bioreactor are recorded at successive points during the running batch process. A measuring vector is produced, for each spectrum, in the low-dimensional main constituent region by the main constituent analysis of the high-dimensional spectra. The deviation is calculated between the measuring vector and a corresponding vector of a nominal trajectory consisting of measuring vectors of a reference charge, which are determined in an earlier batch process, and at least one adjustment operation for the batch process is determined and carried out according to said deviation. The direction of the adjustment operation is maintained when the deviation determined from one point to the next decreases, and modified when the deviation determined from one point to the next remains the same or increases.

Method and arrangement for the online regulation of a batch process in a bioreactor

There is described a diagnosis method and a system including a structure-born noise sensor which transmits, in a bandpass filtered manner, a measuring signal based on the mechanical resonance frequency and capacity thereof and on an inductance and an evaluating device in which the frequency, at which the measuring signal level exceeds a predetermined threshold value, is defined and which is used for producing an error signal, when the frequency exceeds a second predetermined threshold value. As far as the diagnosis performance requires a small number of electronic components and a low power supply, the diagnostic is integrated into existing devices, in particular into process instrumentation field devices for which a restricted quantity of operating power is available. The method and the system are used for identifying a valve leakage with the aid of an electro-pneumatic positional regulator.

Method and system for diagnosing mechanical, electromechanical or fluidic components

The invention relates to a method for data transmission, comprising the following steps: first data from a stochastic process is inputted into at least a first and a second subscriber of a communication network; and a symmetrical key is produced on the basis of the first data in both the first and the second subscriber, and stored in the same, for an encoded data transmission between said subscribers.

Method for encoded data transmission via a communication network

A method for preventing or minimizing operational failures in a technical installation () is disclosed, in which, in accordance with influence quantities () accessible by a control system, at least one criterion () is defined so as to forecast an impending failure of one or more parts of the installation. This criterion is constantly monitored at short time intervals so as to establish a forecast of the expected failure probability. This forecast makes it possible, if necessary, to take early countermeasures () for preventing the failure of the installation or to take steps for minimizing the effects of the imminent failure.

Method for preventing or minimizing operational failures in a technical installation

In a process for designing a fuzzy regulator with at least one input parameter and at least one output parameter (x , x , y), where an incomplete rule base with rules that are defined explicitly is supplemented by an implicit rule whose conditional part yields a truth value that has its greatest value when the explicit rules yield a truth value of 0 and is the smallest when the explicit rules have a truth value of 1, the truth value of the implicit rule may be determined by forming the maximum from the truth values of the explicit rules and calculating the complement to 1. This leads to a great simplification of the design of the regulator and prevents instabilities that can occur with an incomplete rule base.

Process for designing a fuzzy regulator

Arrangement for modeling a non-linear process

Control system, especially for a non-linear process varying in time

In a control device which includes an integrating positioning drive comprising a motor and transmission with backlash and lag, the backlash being the hysteresis of the transmission of mechanical quantities which occurs when the direction of rotation changes and which is caused, for example, by gear tolerances in the transmission due to manufacturng constrains, in addition to a first feedback path which supplies a signal proportional to the position of a control member, there is also provided a second feedback path developing a signal dependent on the positioning rate and the magnitude of the lag in the motor and, the mechanical members of the positioning drive are designed in such a manner that the transmission lag which occurs is greater than the sum of the position changes of the control member during starting of the positioning member over the period from stand-still to reaching its nominal speed and the position change occuring during the lag after the positioning motor is deenergized, providing a control device which can be used in applications which require high positioning rate as well as extremely small positioning steps.

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Eggenstein-Leopoldshafen, Germany

Edmund Linzenkirchner