Claims
- 1. A method of estimating the service life of a cutter, comprising the steps of:
- determining disturbant load torques imposed on the cutter with an observer; and
- using the determined disturbant load torques thereby to estimate the service life of the cutter, wherein determined disturbant load torques are integrated thereby to estimate the service life of the cutter.
- 2. A method according to claim 1, wherein the integrated disturbant load torques are produced by integrating sampled data of the disturbant load torques.
- 3. A method according to claim 1, wherein the integrated disturbant load torques are calculated based on proportional plus integral plus derivative control of disturbant load torques.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-197119 |
Aug 1993 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/593,279, filed Jan. 29, 1996, now abandoned, which is a division of application Ser. No. 08/403,771, filed Mar. 24,1995, now U.S. Pat. No. 5,571,957.
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Divisions (1)
|
Number |
Date |
Country |
Parent |
403771 |
Mar 1995 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
593279 |
Jan 1996 |
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