Novel Nonstationarity Assessment Method for Hypersonic Flutter Flight Tests

Table 1

Prediction results of different criteria.

System stability; criterion	True Value = 4451
	Predictive value	Error
Lyapunov’s; Criterion
M(1)	4531	0.44%
M(2)	4459	2.02%
M(3)	4523	1.62%
M(4)	4593	0.92%
Jury’s; Criterion
F^+ (3)	4525	0.57%
F^- (1)	4565	0.31%
F^- (3)	4547	0.09%