Title: Automatic player capable of reproducing stop-and-go key motion and musical instrument using the same
Application Number: 200610006165 Application Date: 2006.01.25
Publication Number: 1825426 Publication Date: 2006.08.30
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G10F1/02,G10F1/00
Applicant(s) Name: Yamaha Corp. Address:
Inventor(s) Name:
Attorney & Agent: di wankui huang xiaolin
Abstract:
     A servo controller of an automatic player piano normalizes an actual key position to a value less than a reference value indicative of a target stop on a reference trajectory when the key is found in a region immediately before the target stop and to another value greater than the reference value when the key exceeds the target stop, and adjusts a driving signal to a proper value in such a manner that a solenoid-operated key actuator minimizes the difference between the value or another value and the reference value, whereby the servo controller keeps the key in a narrow region on both sides of the target stop for reproducing stop-and-go key motion.
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