Method of operating a virtual mechanical module which simulates a mechanical device

• US 5,859,515 A
• Filed: 09/19/1997
• Issued: 01/12/1999
• Est. Priority Date: 09/13/1991
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Kudo, Yasuharu, Nishimura, Makoto, Matsumoto, Hidehiko, Okada, Misako, Tsujimoto, Tohru, Takizawa, Yoshichika, Suzuki, Yasuyuki
• Primary Examiner(s): LANE, JOHN A
• Application Number:
  US08/934,108
• Time in Patent Office: 480 Days
• Field of Search: 364/142, 364/172, 364/190, 318/567, 318/568.1, 318/568.19, 318/85, 318/560
• US Class Current: 318/560
• CPC Class Codes: B65G 43/08 Control devices operated by article or material being fed, conveyed or discharged and controlling the discharging devices B65G47/42
• CPC Class Codes: B65H 2220/01 indicating an entity as a function of which control, adjustment or change is performed, i.e. input
• CPC Class Codes: B65H 23/048 by positively actuated movable bars or rollers
• CPC Class Codes: B65H 2511/20 Location in space
• CPC Class Codes: B65H 2511/23 Coordinates, e.g. three dimensional coordinates
• CPC Class Codes: B65H 2555/24 Servomotors
• CPC Class Codes: B65H 2557/23 Recording or storing data
• CPC Class Codes: G05B 19/4069 Simulating machining process on screen G05B19/4068 takes precedence
• CPC Class Codes: G05B 19/4147 characterised by using a programmable interface controller [PIC]
• CPC Class Codes: G05B 19/4182 manipulators and conveyor only
• CPC Class Codes: G05B 2219/32137 Configure, connect, combine different program modules
• CPC Class Codes: G05B 2219/36025 Link, connect icons together to form program
• CPC Class Codes: G05B 2219/36143 Use of icon to represent a function, part of program
• CPC Class Codes: G05B 2219/43174 Simulating cam motion mechanism
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
• CPC Class Codes: Y10S 706/92 Simulation

Abstract

An apparatus for synchronously controlling the actual operation of a machine using one or more motors, such as servo motors, by simulating in program form a combination of selectable machine mechanisms, including drivers, connecting shafts, clutches, gears and cams. Each such machine mechanism is represented by a virtual mechanism, preferably as a software module that contains information uniquely identifying the module, operation information that defines the generation of position information and connection information that defines other modules to which connection is made. The software modules comprise drive modules for generating position information, transmission modules for simulating the transmission mechanisms and output modules for outputting motor commands.

Claims

1. A method of operating, on the basis of address control and implemented on a computer, a virtual mechanical module connected to a virtual input device and a virtual output device, comprising the steps of:

reading input position address information corresponding to a position of the virtual input device in accordance with connection information;

calculating a position address of the virtual input device from said input position address information within a predefined input movement range;

determining whether said position address is within a range of valid addresses;

operating on an operational expression of said virtual mechanical module using said input position address information and said position address calculated in said calculating step to produce an operation result indicating an output position address, wherein said output position address corresponds to a position of the virtual output device;

defining said input position address information as a preceding value;

storing said preceding value in an input preceding value address area;

storing said operation result in an output address area; and

causing, based on said operation result, movement of a machine.

2. The method of operating a virtual mechanical module on the basis of address control as recited in claim 1, wherein said virtual mechanical module is a software module stored in a computer-readable memory.

3. The method of operating a virtual mechanical module on the basis of address control as recited in claim 1, wherein said input preceding value address area and said output address area are computer-readable memories.

4. The method of operating a virtual mechanical module on the basis of address control as recited in claim 1, wherein the virtual mechanical module simulates a mechanical gear.

5. The method of operating a virtual mechanical module on the basis of address control as recited in claim 4, wherein said operation expression is

6. The method of operating a virtual mechanical module on the basis of address control as recited in claim 5, wherein said virtual input device is a virtual input axis and said virtual output device is a virtual output axis.

7. The method of operating a virtual mechanical module on the basis of address control as recited in claim 5, wherein said mechanical gear simulated by the virtual mechanical module is a sectored mechanical gear having gear teeth disposed on a portion of the gear, said range of valid addresses corresponding to said portions of said sectored mechanical gear having teeth.

8. The method of operating a virtual mechanical module on the basis of address control as recited in claim 1, further comprising the step of:

reading parameter and variable information addresses.

9. The method of operating a virtual mechanical module on the basis of address control as recited in claim 8, wherein said operating step further comprises:

using said parameter and variable information addresses to produce an operation result.

10. The method of operating a virtual mechanical module on the basis of address control as recited in claim 1, wherein said machine is a servo motor.

11. A method of operating, on the basis of address control and implemented on a computer, a virtual mechanical module connected to a virtual input device and a virtual output device, comprising the steps of:

reading input position address information corresponding to a position of the virtual input device in accordance with connection information;

calculating a position address of the virtual input device from said input position address information within a predefined input movement range;

determining whether said position address is within a range of valid addresses;

operating on an operational expression of said virtual mechanical module using said input position address information and said position address calculated in said calculating step to produce an operation result indicating an output position address, wherein said output position address corresponds to a position of the virtual output device;

defining said input position address information as a preceding value;

storing said preceding value in an input preceding value address area;

storing said operation result in an output address area;

outputting said operation result stored in said output address area to the virtual output device for controlling a machine; and

controlling the machine, based on said operation result, thereby causing movement of the machine.

12. The method of operating a virtual mechanical module on the basis of address control as recited in claim 11, wherein said machine comprises a motor.

13. The method of operating a virtual mechanical module on the basis of address control as recited in claim 11, wherein said machine is a servo motor.

14. A method of operating a virtual mechanical module, implemented on a computer, on the basis of address control, comprising the steps of:

reading input position address information in accordance with connection information;

calculating a position address from said input position address information within a predefined input movement range;

determining whether said position address is within a range of valid addresses;

operating on an operational expression of said virtual mechanical module using said input position address information and said position address calculated in said calculating step to produce an operation result corresponding to an output position address;

defining said input position address information as a preceding value;

storing said preceding value in an input preceding value address area;

storing said operation result in an output address area; and

causing, based on said operation result, movement of a machine.

15. The method of operating a virtual mechanical module on the basis of address control as recited in claim 14, further comprising the step of:

reading parameter and variable information addresses.

16. The method of operating a virtual mechanical module on the basis of address control as recited in claim 14, wherein said operating step further comprises:

using said parameter and variable information addresses to produce an operation result.

17. The method of operating a virtual mechanical module on the basis of address control as recited in claim 14, wherein said machine is a servo motor.

18. A method of operating a virtual mechanical module, implemented on a computer, on the basis of address control, comprising the steps of:

reading input position address information in accordance with connection information;

calculating a position address from said input position address information within a predefined input movement range;

determining whether said position address is within a range of valid addresses;

operating on an operational expression of said virtual mechanical module using said input position address information and said position address calculated in said calculating step to produce an operation result corresponding to an output position address;

defining said input position address information as a preceding value;

storing said preceding value in an input preceding value address area;

storing said operation result in an output address area;

outputting said operation result stored in said output address area to a virtual output device for controlling a machine; and

controlling the machine, based on said operation result, thereby causing movement of the machine.

19. The method of operating a virtual mechanical module on the basis of address control as recited in claim 18, wherein said machine comprises a motor.

20. The method of operating a virtual mechanical module on the basis of address control as recited in claim 18, wherein said machine is a servo motor.

21. A software module for simulating a mechanical device, embodied in a tangible medium, operated on the basis of address control, comprising:

means for reading input position address information in accordance with connection information;

means for calculating a position address from said input position address information within a predefined input movement range;

means for determining whether said position address is within a range of valid addresses;

means for operating on an operational expression of said software module using said input position address information and said position address calculated in said calculating step to produce an operation result corresponding to an output position address;

means for defining said input position address information as a preceding value;

means for storing said preceding value in an input preceding value address area;

means for storing said operation result in an output address area; and

means for causing, based on said operation result, movement of a machine.

22. A software module as recited in claim 21, further including means for reading parameter and variable information addresses.

23. A software module as recited in claim 22, wherein said operating means further comprises means for processing said parameter and variable information addresses to produce an operation result.

24. A software module for simulating a mechanical device, embodied in a tangible medium, operated on the basis of address control, comprising:

means for reading input position address information in accordance with connection information;

means for calculating a position address from said input position address information within a predefined input movement range;

means for determining whether said position address is within a range of valid addresses;

means for operating on an operational expression of said software module using said input position address information and said position address calculated in said calculating step to produce an operation result corresponding to an output position address;

means for defining said input position address information as a preceding value;

means for storing said preceding value in an input preceding value address area;

means for storing said operation result in an output address area;

means for outputting said operation result stored in said output address area to a virtual output device for controlling a machine; and

means for controlling the machine, based on said operation result, thereby causing movement of the machine.

25. A software module as recited in claim 24, wherein said machine comprises a motor.

26. A method of operating a transmission software module representing a gear in a virtual positioning apparatus having input and output memory locations for storing input and output position information, respectively, for controlling a motor comprising the steps of:

inputting present input position information stored in the input memory location;

operating on said input position information with a predetermined operation expression based on a predetermined ratio, thereby producing a result which corresponds to a change in the output position information stored in the output memory location based on said present input position information and said predetermined ratio;

defining said present input position information as a preceding value;

storing said preceding value in an input preceding value area;

storing in the output memory location as present output position information said result of said operating step; and

causing, based on said result, movement of the motor.

27. The method as defined in claim 26, wherein said operation expression is y(n)=(x(n)-x(n-1))*Gi/Go*Gs+y(n-1), where x(n) is said present input position information, x(n-1) is preceding input position information stored in the input memory location prior to performing the step of inputting said present input position information, y(n) is said present output position information, and y(n-1) is preceding output position information stored in the output memory location prior to storing said present output position information in said storing step, and wherein said virtual transmission module represents a mechanical device having an input gear, an output gear and zero or more intermediate gears disposed between said input and output gears in which said input and output gears are connected to input and output axes, respectively, wherein Gi is the number of teeth of said input gear, Go is the number of teeth of said output gear and Gs is -1 if the number of intermediate, input and output gears is even and +1 if the number of gears is odd.

28. The method as defined in claim 27, wherein y(n) is stored in said output memory location upon performing said step of operating on said input position information stored in the input memory location with a predetermined operation expression, thereby replacing y(n-1).