Modal Analysis and Flight Validation of Compound Multi-Body Aircraft

The flight dynamics of a compound aircraft are highly coupled and significantly different from those single aircraft. In this paper, the characteristic three-unit connected analyzed in detail. By distinguishing aircraft’s modes into symmetric mode group an asymmetric group, mechanisms by which relative roll impact rigid-body vehicle become clear. trim configuration has profound influence on its stability modes. addition, can be separated full-state model appropriate simplifications, modal coupling mechanism evolution law analytically derived. key parameters have significant pointed out paper. Finally, common failure identified. A experiment with test data verifies correctness above theoretical analysis.