Research Article
Research on Hysteresis of Piezoceramic Actuator Based on the Duhem Model
Table 2
The relative errors of two algorithms.
| | Relative error (gradient correction algorithm) | Relative error (recursive least squares algorithm) |
| 2 | −0.0699 | −0.0941 | 4 | 0.0012 | −0.0110 | 6 | 0.0225 | 0.016 | 8 | −0.0034 | −0.0065 | 10 | −0.0011 | −0.0024 | 12 | 0.0021 | 0.0035 | 14 | 0.0055 | 0.0036 | 16 | −0.0041 | 0.0086 | 18 | −0.0026 | 0.0159 | 20 | −0.0167 | 0.0259 | Mean square deviation of the error | 0.0222 | 0.0263 | Maximum error | 0.048 μm | 0.066 μm |
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