Automatic player musical instrument, automatic player used...

Details Automatic player musical instrument, automatic player used... Automatic player musical instrument, automatic player used...

2007-10-09

2007-10-09

Donovan, Lincoln (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S013000, C084S021000, C084S600000

Reexamination Certificate

active

11057568

ABSTRACT:
An automatic playing system creates a feedback control loop for the keys incorporated in an acoustic piano; key sensors, which are provided under the front portions of the keys, informs a motion controller of current positions, and the motion controller periodically compares the current position and a current velocity with a target position on a reference trajectory and a target velocity to see whether or not a positional deviation and a velocity deviation occur; when the motion controller finds the deviations, the motion controller multiplies the deviations by a position gain and a velocity gain for determining an increment or decrement of the duty ratio of driving signals, and supplies the driving signals to the solenoid-operated actuators so as to accelerate or decelerate the keys; the gain is variable depending upon the key motion so that the actual key trajectory becomes close to the reference trajectory.

REFERENCES:
patent: 4913026 (1990-04-01), Kaneko et al.
patent: 5022301 (1991-06-01), Stahnke
patent: 5131306 (1992-07-01), Yamamoto
patent: 5262586 (1993-11-01), Oba et al.
patent: 5451706 (1995-09-01), Yamamoto et al.
patent: 5530198 (1996-06-01), Ishii
patent: 5568138 (1996-10-01), Mantani
patent: 5650580 (1997-07-01), Yamamoto et al.
patent: 5652399 (1997-07-01), Fujiwara et al.
patent: 5663513 (1997-09-01), Sugiyama et al.
patent: 5691489 (1997-11-01), Fujiwara et al.
patent: 5739450 (1998-04-01), Fujiwara et al.
patent: 5880393 (1999-03-01), Kaneko et al.
patent: 6051762 (2000-04-01), Fujiwara et al.
patent: 6111174 (2000-08-01), Oba et al.
patent: 6271447 (2001-08-01), Fujiwara et al.
patent: 6297437 (2001-10-01), Ura et al.
patent: 6362405 (2002-03-01), Koseki et al.
patent: 6403872 (2002-06-01), Muramatsu et al.
patent: 6515213 (2003-02-01), Muramatsu et al.
patent: 6515565 (2003-02-01), Muramatsu et al.
patent: 6858789 (2005-02-01), Muramatsu et al.
patent: 6969791 (2005-11-01), Fujiwara
patent: 6992241 (2006-01-01), Fujiwara
patent: 7094961 (2006-08-01), Ura et al.
patent: 7161137 (2007-01-01), Ura et al.
patent: 2001/0007220 (2001-07-01), Koseki et al.
patent: 2002/0007717 (2002-01-01), Uehara
patent: 2003/0070526 (2003-04-01), Muramatsu et al.
patent: 2003/0133700 (2003-07-01), Uehara
patent: 2005/0092160 (2005-05-01), Fujiwara
patent: 2005/0145087 (2005-07-01), Fujiwara
patent: 2005/0145781 (2005-07-01), Ura et al.
patent: 2005/0150361 (2005-07-01), Muramatsu et al.
patent: 2005/0211048 (2005-09-01), Fujiwara
patent: 2005/0211049 (2005-09-01), Fujiwara et al.
patent: 2005/0212846 (2005-09-01), Shinkawa et al.
patent: 2005/0235801 (2005-10-01), Muramatsu et al.
patent: 2005/0235808 (2005-10-01), Ishii et al.
patent: 2005/0247182 (2005-11-01), Sasaki et al.
patent: 2006/0016325 (2006-01-01), Fujiwara et al.
patent: 2006/0090633 (2006-05-01), Muramatsu
patent: 2275991 (1990-11-01), None
patent: 7175472 (1995-07-01), None

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