摘要:
The invention relates to a control device (1) for a process, in which a controlled variable (4) can be influenced with the aid of a plurality of different regulating units (11, 21), which in particular are based on different physical principles. A set point (3) and the controlled variable (4) are fed to both a first controller (13) and a second controller (23). The first controller (13) is located as primary controller in automatic operation and has a regulating range of the first manipulated variable (12) that is defined by limiting values. The second controller (23) can be switched between automatic operation and tracking operation, in which said controller generates a predefined or predefinable constant value of the second manipulated variable (22). By means of a logic circuit (16, 28), the second controller (23) is switched to automatic operation if a limiting value of the first manipulated variable (12) is reached, and otherwise to tracking operation. Advantageously, by means of the control device, a plurality of regulating units which have the same direction of action can be operated fully automatically and autonomously.
摘要:
The invention relates to a method for identifying a delay-susceptible control path in the control of a steam generator, and a device constructed for carrying out the method. A model structure of the steam generator is specified, consisting of an unknown time-variable Nth-order delay element and a known integrator. Also used for the identification are measurements of the fuel mass flow, the turbine steam mass flow, and the live steam pressure which arises in the steam accumulator behind the steam generator after the removal of the turbine steam mass flow. Using these online measurements and the model structure, the live steam mass flow at the output of the steam generator is derived by calculation. In this way, the input value and the output value of the Nth-order delay element are determined in such a way that, using an estimation method, the parameters of a continuous transmission function of the Nth-order delay element are also determined online. The estimated parameters are then converted into the time constants of a delay element with N independent time constants. In a following step, the relevant time constant for the delay element of the specified model structure is determined by comparison of the N independent time constants.
摘要:
The invention relates to a controlling system for regulating a system with several coupled controlled variables, comprising controllers (10, 11) having associated controlled variables (x1, x2). The system is a decoupling network having at least one first decoupling member (12) connected in series and forming a first correcting variable (14). A controller (11) is configured in such a way that integrator windup is eliminated when the output variable (y2) corrected with the correcting variable (14) reaches a manipulated variable limit. Bumpless manual to automatic changeover of the controller is also made possible. The invention can be used in the regulation of multivariable systems.
摘要:
The invention relates to a method for the wear-minimized operation of at least one installation component of an installation and to an installation with means for carrying out the said method. In order to make wear-minimized operation of components in an installation possible, the invention proposes that a sensor for state identification, which sensor is associated with the installation component, transmits a sensor signal to an evaluation unit, that the evaluation unit checks the sensor signal to ascertain whether a wear-promoting operating state is present, and that in the event of the presence of such an operating state the corresponding installation component is driven in such a way that a change in the operating state in favour of an operating state with less wear takes place. If, for example, a component is operated at its resonant frequency, it is ensured that the component is operated at a slightly different rotation speed, at which far less severe oscillations occur. This method therefore increases the life of installation components and makes optimum utilization of an installation possible with at the same time gentle treatment of the installation components.
摘要:
The invention relates to the online regulation of a batch process in a bioreactor (1). According to the invention, spectra of the actual charge in the bioreactor (1) are recorded at successive points during the running batch process. A measuring vector (12) is produced, for each spectrum, in the low-dimensional main constituent region by the main constituent analysis of the high-dimensional spectra. The deviation (13) is calculated between the measuring vector (12) and a corresponding vector (14) 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 (13). The direction of the adjustment operation is maintained when the deviation (13) determined from one point to the next decreases, and modified when the deviation (13) determined from one point to the next remains the same or increases.
摘要:
The invention relates to a control system and to a control method. The control system comprises a controller that determines a manipulated variable (y) based on a comparison between a reference variable (w) and a controlled variable (x). In order to control a process (1) along predetermined trajectories, i.e. having essentially predetermined courses (20, 22) of the manipulated variable and of the controlled variable, courses are stored in a memory (6), and first set points (yt) corresponding to the predetermined course (20) of the manipulated variable (y), which is determined by the controller, are superimposed in order to form an optimized manipulated variable (y'), and second set points (xt) corresponding to the predetermined course (22) of the controlled variable of the reference variable (w) are fed to the controller (2). This results in obtaining an improved control behavior, particularly in batch processes.