Machine constant estimation device
US6736018B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Aug 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An acceleration signal generating portion 11 inputs a machine velocity vm of a drive machine 32 and outputs an acceleration signal af of low frequency. Also, a pseudo torque signal generating portion 12 inputs a torque command &tgr;r, removes the noise, and outputs a pseudo torque signal &tgr;f of low frequency. Also, a torque error signal calculating portion 14 subtracts a product of the acceleration signal af and a previous mechanical constant estimated value Je(k−1) calculated in a multiplication circuit 13 from the pseudo torque signal &tgr;f of low frequency, and outputs a torque error signal &tgr;err as a disturbance torque estimated value &tgr;d0. Also, a mechanical constant estimation gain portion 16 estimates the mechanical constant by inputting a torque error derivative signal d&tgr;err that is generated by torque error derivative signal generating portion 15 by inputting a torque error signal &tgr;err. Also, a mechanical constant estimation gain portion 16 starts or stops to update the mechanical constant estimating operation, based on a disturbance torque estimated value &tgr;d0, or alters the mechanical constant estimation gain. Also, a mechanical constant estima…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.