Research Article
Nonlinear State Space Modeling and System Identification for Electrohydraulic Control
Table 1
The identification results.
| | Parameters | Model type | | H-W | Hammerstein | Wiener | ARX |
| | 1 | 1 | −0.0358 | −0.0276 | | 0.0349 | 0.0105 | 0.0151 | 0.0124 | | 0.0617 | 0.0147 | −0.0069 | 0.0514 | | −0.0309 | −0.0596 | 0.0069 | −0.0661 | | −0.0598 | −0.0613 | −0.0075 | −0.0653 | | −0.0897 | −0.0610 | −0.0081 | −0.0619 | | 0.0109 | 0.0027 | — | — | | −1.4619 × 10−5 | 0.0012 | — | — | | −0.0050 | −0.0012 | — | — | | 0.0052 | 0.0045 | — | — | | −0.0165 | −0.0055 | — | — | | 0.0033 | 0.0013 | — | — | | 0.0104 | 0.0036 | — | — | | −0.0010 | −8.6858 × 10−4 | — | — | | 1 | — | 1 | — | | 0.0050 | — | 0.0013 | — | | 6.3562 × 10−4 | — | 2.6895 × 10−4 | — |
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