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为了准确评价飞机滚转性能,提出了一种基于试飞数据的滚转模态特性计算方法。首先,通过对比仿真输出和试飞数据,证明了横航向控制律和滚转响应与设计状态的一致性;然后,在频域内采用低阶等效系统得到与真实系统性能一致的数字仿真系统滚转性能指标,从而获得真实系统的滚转性能指标;最后,建立滚转运动数学模型,讨论影响滚转特性的因素并进行优化完善。仿真结果证明,该方法所得结果准确、可靠、有效,可用于型号试飞数据处理。
In order to accurately evaluate the roll performance of the aircraft, a method for calculating the modal characteristics of the roll based on the test data is proposed. First of all, by comparing the simulation output and flight test data, it is proved that the transverse navigation law and the roll response are consistent with the design state. Then, the low-order equivalent system is used in the frequency domain to get the digital simulation system rolling with the same real system performance Performance index to obtain the real rolling performance of the system. Finally, the mathematic model of rolling motion is established to discuss the factors that affect the rolling characteristics and to optimize and perfect it. Simulation results show that the results obtained by this method are accurate, reliable and effective and can be used for data processing of model test flight.