Method for flexible simulation modeling of multi-component systems using a global mailbox to facilitate communication between discrete component models

• US 5,881,270 A
• Filed: 10/16/1997
• Issued: 03/09/1999
• Est. Priority Date: 05/01/1997
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Worthington, Bruce Lee, Donnelly, Colette Mary
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): Irshadullah, M.
• Application Number:
  US08/951,346
• Time in Patent Office: 509 Days
• Field of Search: 364/490, 364/489, 395/500, 395/183.14
• US Class Current: 703/21
• CPC Class Codes: G06F 2111/20 Configuration CAD, e.g. designing by assembling or positioning modules selected from libraries of predesigned modules
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: Y10T 74/20317 including electric motor

Abstract

A methodology for allowing component models to be developed independently and allowing a user to select and connect a set of models into a desired multi-component configuration at run-time. The component models are built free from inter-model dependencies, thereby enhancing flexibility and reuse. The component models conform to a standard interface for initialization (prior to simulation run) and inter-model communication (prior to and during a simulation run).

Claims

1. A method of simulating a complex physical system using a plurality of discrete component models each conforming to an interface specification, comprising the steps of:

in response to user-selection of a system configuration to be modeled, selecting a first set of discrete component models necessary to model the system configuration;

establishing a global addressable data structure associated with the set of discrete component models; and

during a simulation, posting messages to and receiving messages from the global addressable data structure to enable communications among the set of discrete component models.

2. The method as described in claim 1 further including the step of verifying selection of the discrete component models prior to running the simulation.

3. The method as described in claim 2 wherein the step of verifying determines whether the discrete component models of the first set have unopened messages in the global addressable data structure.

4. The method as described in claim 1 further including the step of de-selecting a second set of discrete component models not necessary to model the system configuration prior to running the simulation.

5. The method as described in claim 1 wherein each discrete component model of the first set has a unique address in the global addressable data structure.

6. The method as described in claim 5 wherein the unique address is assigned to the discrete component model during a registration process.

7. A method of simulating a complex physical system using a plurality of discrete component models each conforming to an interface specification, comprising the steps of:

in response to user-selection of a system configuration to be modeled, selecting a first set of discrete component models necessary to model the system configuration and de-selecting a second set of discrete component models non necessary to model the system configuration;

establishing a global mailbox associated with the first set of discrete component models; and

during a simulation, posting messages to and receiving messages from the global mailbox to enable communications among the set of discrete component models of the first set.

8. The method as described in claim 7 wherein each discrete component model of the first set has a unique address in the global addressable data structure.

9. The method as described in claim 8 wherein the unique address is assigned to the discrete component model during a registration process.

10. A computer program product in a computer-readable medium for use in a computer to simulate a complex system using a set of discrete, independent component models each conforming to a predefined interface, the computer program product comprising:

means responsive to user-selection of a system configuration to be modeled for selecting a set of discrete component models necessary to model the system configuration;

means for maintaining a global mailbox accessible to all discrete component models of the set; and

means operative during a simulation for posting messages to and receiving messages from the global mailbox to enable the set of discrete component models to communicate with each other.

11. The computer program product as described in claim 10 further including means for assigning each discrete component model an address in the global mailbox prior to the simulation.

12. The computer program product as described in claim 10 further including means for verifying selection of the discrete component models prior to running the simulation.

13. The computer program product as described in claim 12 wherein the verifying means determines whether the discrete component models of the first set have unopened messages in the global mailbox.

14. A computer, comprising:

a processor;

an operating system;

means for generating a complex system model using a selected interconnected set of discrete, independent component models each conforming to a predefined interface; and

means for maintaining a global mailbox accessible to all discrete, independent component models of the interconnected set; and

means, operative during a simulation, for posting messages to and receiving messages from the global mailbox to enable the discrete component models to communicate with each other.

15. The computer as described in claim 14 further including means for assigning each discrete component model an address in the global mailbox prior to the simulation.

16. The computer as described in claim 14 further including means for verifying selection of the discrete component models prior to running the simulation.

17. The computer as described in claim 16 wherein the verifying means determines whether the discrete component models of the first set have unopened messages in the global mailbox.

18. The computer as described in claim 14 wherein connection instances of discrete component models communicate with each other using the global mailbox during the simulation to exchange common parameters.

19. The computer as described in claim 14 wherein connection instances of discrete component models communicate with each other using the global mailbox during the simulation to verify compatibility.