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US 2003/0195726 A1Published application
Hybrid model generation method and program product
AssigneeNone recorded
InventorKoichi Kondo
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AssigneeNone recorded
InventorKoichi Kondo
Estimating the term…
A method of generating a hybrid model described in a hybrid model language for a system is disclosed. A description of a plurality of continuous system equations, which define a plurality of states of the system, is extracted from input data. The input data may be described in a format of state transition chart. The description of the plurality of continuous system equations is converted into a first part of a statement of the hybrid model. A description of a state transition is also extracted from the input data. The state transition may be caused by a discrete event. The description of the state transition is converted into a second part of the statement of the hybrid model. Then, the first part and the second part are combined to complete the statement, thereby completing the hybrid model.
A method of generating a hybrid model described in a hybrid model language for a system, the method comprising:
A computer program product comprising a computer usable medium having computer readable program code means for causing a computer to generate a hybrid model described in a hybrid model language for a system, the computer readable program code means in said computer program product comprising:
Dependencies are inferred from the claim text.
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Digital computing or data processing equipment or methods, specially adapted for specific functions: complex mathematical operations
Systems involving the use of models or simulators of said systems: electric
Computing and data processing
Control or regulating systems in general
Term end not estimated
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2002-073212, filed Mar. 15, 2002, the entire contents of which are incorporated herein by reference.
1. Field of the Invention
The present invention relates to a hybrid model generation method and a program product for generating a hybrid model used in behavioral simulations of a machine, plant, and the like.
FIG. 1 is a schematic block diagram showing the arrangement of a hybrid model generation apparatus according to an embodiment of the present invention;
FIG. 2 is a flow chart showing the process of generating a hybrid model by the hybrid model generation apparatus of the embodiment;
FIG. 3 is a view showing a mechanical device as an example of a generation target of a hybrid model, and showing its first state;
An embodiment of the present invention will be described hereinafter with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram showing the arrangement of a hybrid model generation apparatus according to an embodiment of the present invention. This apparatus is implemented using a general computer (e.g., a personal computer (PC) or the like) and software which runs on the computer. The computer includes an engineering workstation (EWS) and the like suited to CAD and CAE. The present invention can be practiced as a program product which makes such computer execute a series of procedures associated with hybrid model generation.
As shown in FIG. 1, the hybrid model generation apparatus of this embodiment comprises I/O devices including a display 201, keyboard 202, mouse 203, and a processor 204 which includes a CPU (not shown), memory 209, secondary storage device 205, and the like. The processor 204 includes a state definition module 206, continuous system equation input module 207, state transition definition module 208, and hybrid model output module 210. These modules are implemented as software which collaborates with hardware that forms the computer, and run under a well-known operating system. The state definition module 206, continuous system equation input module 207, and state transition definition module 208 generate input data in a state transition chart format on the memory 209. This input data is read out when the hybrid model output module 210 accesses the memory 209. The readout data is converted into data in a hybrid model format in a procedure to be described later, and the converted data is output to the secondary storage device 205.