Data processing: measuring – calibrating – or testing – Testing system – For transfer function determination
Reexamination Certificate
2002-08-02
2004-11-09
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Testing system
For transfer function determination
C160S310000, C188S378000, C219S121690, C244S017270, C244S054000, C318S649000, C702S109000
Reexamination Certificate
active
06816800
ABSTRACT:
CROSS-REFERENCES TO RELATED APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
BACKGROUND OF THE INVENTION
The invention relates to a method of recording a vibration isolation system having at least one vibration isolation device that can be assigned to an isolation element th vibration isolation system being assigned as at least one of a closed-loop or open-loop control device; a computer program for carrying out the method on a computer wherein the computer program comprises a plurality of program modules; an apparatus for carrying out the method and for executing the computer program wherein the at least one of the closed-loop or open-loop control devices comprises at least one of a controller unit or user-oriented function units; and a system for recording a vibration isolation system that comprises an apparatus for carrying out a computer program.
TECHNICAL FIELD
Methods for vibration isolation are known in which the control of a vibration isolation system is carried out on the basis of a substantially fixedly predefined parameter set. In particular, the missing or inadequate possibilities of monitoring or diagnosis, that is to say the absence of fault detection and elimination on the vibration isolation system, have been shown to be a problem in the vibration isolation of existing systems.
Known methods, computer programs and apparatuses for vibration isolation also have the disadvantage that they provide barely any interfaces via which, for example, diagnostic data are or can be picked off in a simple way, processed and made available to the user.
However, the difficulty of gaining access to data hampers not only the monitoring of the vibration isolation system but also flexible adaptation of the same to new or unforeseeable states or situations.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide an open system for recording and/or assessing a vibration isolation system.
According to the invention, this object is achieved, inter alia, by a method of recording a vibration isolation system having at least one vibration isolation device that can be assigned to an isolation element, the vibration isolation system being assigned at least one of a closed-loop or open-loop control device, including the following steps:
providing at least one of a closed-loop or open-loop control structure;
picking up and processing signals and/or variables related to the isolation system by exciting the vibration isolation system into vibration,
forming at least one isolation system characteristic reference fingerprint data set on the basis of the control structure and the recorded variables for assessing the vibration isolation system,
recording and forming an actual fingerprint data set,
comparing at least part of the reference fingerprint with at least part of the actual fingerprint, and
assessing the state of the vibration isolation system on the basis of specific deviations between the reference and the actual fingerpint.
Furthermore, for the purpose of achieving the object, a system as claimed is specified, which comprises the method, the computer program having the features as claimed and the apparatus having the features as claimed.
In relation to a vibration isolation system, which comprises at least one vibration isolation device that can be assigned to an isolation element, the fact that a method of recording the system with the aid of a closed-loop and/or open-loop control device is provided, in which a closed-loop and/or open-loop control structure can be predefined and in which signals and/or variables related to the isolation system are picked up, processed and/or provided, and in which, on the basis of the definable structures and variables, at least one isolation system characteristic data set for assessing the vibration isolation system is formed, means that for the first time the indicative fundamentals for an open system for evaluation, closed-loop and open-loop control are provided.
In this sense, the method as claimed by the invention offers the possibility of adapting the closed-loop and open-loop control structure provided in a differentiated manner to individual requirements. In this case, provision is advantageously made, in particular within the context of the provision of the closed-loop and/or open-loop control structure in flexible form, for the provision of an extremely wide range of control loops to be made. In this way, the method permits the definition of diverse types of control, such as feedback and/or feed-forward control. In order, moreover, also still to be able to compensate for time fluctuations in the isolation system, the closed-loop and/or open-loop control structure according to the invention also offers the possibility of adaptive control, that is to say the ability of the method to adapt itself to aging processes or external influences, for example.
The variability of the method is also expressed in the fact that in the method, in particular acceleration-determined and/or speed-determined and/or position-determined control loops in the closed-loop and/or open-loop control structure can be selected and defined, in particular independently of one another. Appropriate actuators and control variables or sensors tuned to the isolation system are likewise specified in the method of the invention. For this purpose, the controlled variables in the closed-loop and open-loop control structure can be specified individually, in particular in relation to the actuators and sensors. Examples which may be mentioned here are variables such as in particular limiting values for overload currents with regard to motors belonging to actuators or else controlled variables relating to a pneumatic vibration isolation system.
Also connected with this is the fact that, according to the invention, the possibility is advantageously open of tuning the control loops per se and amongst one another in an extremely differentiated manner. Stabilization or self-stabilization of the vibration isolation system is therefore achieved, with very positive effects. In this case, for example, changeover criteria between the control loops can be defined or individual filters and/or amplifiers can be adjusted, for example with reference to controller gain factors. In addition, mention should be made in particular of the possibility that, with regard to each axis to be isolated, the scope of the influence which the respective signals picked up or sensor signals have or are to have on the axis to be isolated can be determined or predefined. The same is also true of the output signals for the control of the actuating variables.
In addition to the parts of the method already specified above, the method of course also includes the closed-loop and/or open-loop control of the vibration isolation system, in particular on the basis of the control structure provided and/or with the aid of the variables and/or signals and/or of the isolation system characteristic data set. The closed-loop control and/or open-loop control and the control structure provided in this case relate in particular and primarily to all the inventive aspects known and still to be explained relating to vibration isolation and preferably to all the degrees of freedom which are available or are to be isolated.
Consequently, a significant aspect of the invention also consists in particular in providing interfaces of an extremely wide range of types, in order to permit substantially optimal data processing. What are preferably concerned here are interfaces to the hardware and those to the software on the basis of program code means and/or the adaptation of software to existing hardware interfaces, and user interfaces. In this case, the interfaces are used firstly for the acquisition and for the interchange of signals and data between the vibration isolation system and the closed-loop and/or open-loop control device or else, in addition, for the internal forwarding or further processing in the closed-loop and/or open-loop control device and for man-ma
Barlow John
Le John
LandOfFree
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