| 摘要 |
A method of estimating solenoid heat accumulation and providing output power compensation thereof. The method is particularly well suited for compensating the drive solenoids within a player piano mechanism, or similar. A heat value is maintained for each coil whose accumulated heat is of interest. A quantity of heat is periodically removed from each heat value which corresponds to the level of thermal dissipation for the solenoid during the period. Similarly, a quantity of heat is periodically added to the heat value to account for the power being applied to the active solenoids. A gain compensation value may then be calculated from the heat value and used to temperature compensate the power being applied to the solenoids wherein force roll-off is prevented in response to solenoid use.
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