Research Article
Stability Characteristics of Wing Span and Sweep Morphing for Small Unmanned Air Vehicle: A Mathematical Analysis
Table 4
Lateral-directional mode characteristics.
| | No. | Span morphing | Sweep morphing | | (deg) | Span configuration (m) | Period (s) | Time to double (T2)/half amplitude (T1/2) (s) | (deg) | Sweep configuration (deg) | Period (s) | Time to double (T2)/half amplitude (T1/2) (s) |
| | Roll subsidence | | 1 | 15 | 1 | — | 0.052 (T1/2) | 15 | 5 | — | 0.05 (T1/2) | | 2 | 15 | 1.1 | — | 0.048 (T1/2) | 15 | 10 | — | 0.05 (T1/2) |
| | Spiral mode | | 1 | 15 | 1 | — | 0.74 (T2) | 15 | 5 | — | 0.983 (T2) | | 2 | 15 | 1.1 | — | 0.815 (T2) | 15 | 10 | — | 1.14 (T2) |
| | Dutch roll | | 1 | 15 | 1 | 6.9 | 0.21 (T1/2) | 15 | 5 | 6.61 | 0.22 (T1/2) | | 2 | 15 | 1.1 | 7.7 | 0.22 (T1/2) | 15 | 10 | 6.3 | 0.22 (T1/2) |
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