Inner force sense controller for providing variable force to multidirectional moving object, method of controlling inner force sense and information storage medium used therein

• US 5,952,806 A
• Filed: 10/16/1997
• Issued: 09/14/1999
• Est. Priority Date: 10/18/1996
• Status: Expired due to Term

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Muramatsu, Shigeru
• Primary Examiner(s): IP, SHIK LUEN PAUL
• Application Number:
  US08/953,004
• Time in Patent Office: 698 Days
• Field of Search: 318/571, 318/603, 318/602, 318/601, 318/687, 318/135, 318/114, 318/128, 318/560-696, 388/847, 388/903
• US Class Current: 318/568.12
• CPC Class Codes: G10C 3/18 Hammers
• CPC Class Codes: G10C 3/20 involving the use of hydraulic, pneumatic or electromagnetic means
• CPC Class Codes: G10H 1/346 Keys with an arrangement for simulating the feeling of a piano key, e.g. using counterweights, springs, cams
• CPC Class Codes: G10H 2220/311 with controlled tactile or haptic feedback effect; output interfaces therefor
• CPC Class Codes: G10H 2220/401 3D sensing, i.e. three-dimensional (x, y, z) position or movement sensing. movement pattern or gesture sensing G10H2220/201; geolocation sensing G10H2220/355, 3D sensing with accelerometer G10H2220/395

Abstract

An inner force sense controller includes an actuator for exerting a reaction force on a moving object such as a manipulator, a sensor for producing a detecting signal indicative of current position of the moving object and a controlling unit connected to the actuator and the sensor; the controlling unit calculates a current velocity so as to determine the direction of motion, and selects one of the data tables assigned to the direction of the motion for reading out a target reaction force; and the operator feels the inner force sense to be different depending upon the direction of the motion.

Claims

1. An inner force sense controller for giving a force to a manipulator comprising:

an actuator connected to said manipulator, and driving said manipulator in more than one direction;

a detector for detecting said current position of said manipulator;

a controller connected to said actuator and said detector, and producing a controlling signal representative of said force to be produced by said actuator;

a driver responsive to said controlling signal for energizing said actuator, thereby exerting said force to said manipulator; and

a determining means for determining the direction of a motion of said manipulator, and causing said controller to take said direction of said motion of said manipulator into account for determining the magnitude of said force.

2. The inner force sense controller as set forth in claim 1, in which said force is exerted on said manipulator in the opposite direction to said direction of said motion.

3. The inner force sense controller as set forth in claim 1, in which said force is exerted on said manipulator in the same direction as said motion thereof.

4. The inner force sense controller as set forth in claim 1, in which said manipulator is a key incorporated in a keyboard musical instrument so that said force gives a player an inner force sense similar to that of said key differently varied between a forward motion and a backward motion.

5. The inner force sense controller as set forth in claim 4, in which said keyboard musical instrument is an acoustic piano.

6. An inner force sense controller for giving a force to a manipulator comprising:

an actuator connected to said manipulator, and driving said manipulator in more than one direction;

a detector for detecting said current position of said manipulator;

a controller connected to said actuator and said detector, and producing a controlling signal representative of said force to be produced by said actuator; and

a driver responsive to said controlling signal for energizing said actuator, thereby exerting said force to said manipulator, wherein

said controller determines a current velocity and a current acceleration on the basis of said current position, and decides the magnitude of said force on the basis of a combination of elements selected from the group consisting of said current position, said current velocity and said current acceleration.

7. The inner force sense controller as set forth in claim 6, in which said controller includes data tables storing parameters of an equation of motion, and said parameters are selectively read out from said data tables on the basis of said combination for determining said force.

8. The inner force sense controller as set forth in claim 6, in which said manipulator is a key incorporated in a keyboard musical instrument.

9. The inner force sense controller as set forth in claim 8, in which said keyboard musical instrument is an acoustic piano.

12. The method as set forth in claim 8, in which contents of said data tables are supplied from an information storage medium before said step b).

13. The method as set forth in claim 8, in which contents of said data tables are supplied through an information communicating network.

10. A method for controlling an inner force sense comprising the steps of:

a) producing a piece of status information representative of a current status of a manipulator movable in more than one direction;

b) determining the magnitude of a force on the basis of said current status and a direction of a motion of said manipulator; and

c) exerting said force on said manipulator for imparting said inner force sense.

11. The method as set forth in claim 10, in which said piece of status information causes component forces corresponding, to terms of an equation of motion to be read out from data tables for determining said magnitude of said force.

14. The method as set forth in claim 10, in which said manipulator is a key incorporated in a keyboard musical instrument so that said force gives a player an inner force sense similar to that of said key differently varied between a forward motion and a backward motion.

15. The method as set forth in claim 14, in which said keyboard musical instrument is an acoustic piano.

16. An information storage medium for storing a controlling program, said controlling program comprising the steps of:

a) producing a piece of status information representative of a current status of a manipulator movable in more than one direction;

b) determining the magnitude of a force on the basis of said current status and a direction of a motion of said manipulator; and

c) exerting said force on said manipulator for imparting said inner force sense.

17. The information storage medium as set forth in claim 16, in which said manipulator is a key incorporated in a keyboard musical instrument so that said force gives a player an inner force sense similar to that of said key differently varied between a forward motion and a backward motion.

18. The method as set forth in claim 17, in which said keyboard musical instrument is an acoustic piano.

19. An inner force sense controller for exerting a force on a manipulator movable in more than one direction by using an actuator, comprising a means for receiving a program through an information communicating network, said program including the steps of:

a) producing a piece of status information representative of a current status of a manipulator movable in more than one direction;

b) determining the magnitude of a force on the basis of said current status and a direction of a motion of said manipulator; and

c) exerting said force on said manipulator for imparting said inner force sense.

20. The inner force sense controller as set forth in claim 19, in which said manipulator is a key incorporated in a keyboard musical instrument so that said force gives a player an inner force sense similar to that of said key differently varied between a forward motion and a backward motion.

21. The method as set forth in claim 20, in which said keyboard musical instrument is an acoustic piano.