摘要: Different design methods led to five test signals which were implemented via an electrohydraulic control system in a flight test program with a De Havilland DHC-2 aircraft. Aircraft parameters were calculated using the maximum lik... 展开 Different design methods led to five test signals which were implemented via an electrohydraulic control system in a flight test program with a De Havilland DHC-2 aircraft. Aircraft parameters were calculated using the maximum likelihood method, and flight path reconstruction followed by linear regression analysis. Each test signal was repeated 10 times, allowing an evaluation based on sample statistics. Input signal type has a considerable effect on parameter estimation accuracy. High frequency signals compare favorably to lower frequency signals for this aircraft. The structure of the mathematical model used does affect the parameter estimation results in terms of sample mean and variance. High accuracy instrumentation techniques reduce the effect of the data analysis procedure on parameter estimation results. 收起