摘要
直升机配平,本质上为非线性方程组的求解。以UH-60为例,建立直升机非线性飞行动力学模型;通过设置主旋翼轴前倾角为零简化模型,数值延拓得到悬停状态平衡解;以前飞速度为延拓参数,数值延拓完成定直平飞状态的配平计算。使用MATLAB计算平台,配平结果与参考数据吻合较好。结果表明:数值延拓方法简单有效,其结果具有连续性和全面性,易于观察解曲线走向。作为一类计算方法,数值延拓适用于直升机配平计算。
Helicopter trim calculation is essentially to solve nonlinear equations. The UH -60 heli- copter nonlinear flight dynamics model was built. The model was simplified by setting the main rotor shaft forward tilt angle to zero and equilibrium solutions were found by numerical continuation meth- od in hover state. With the forward velocity as a continuation parameter, trim calculation was accom- plished by numerical continuation method at the hover in the forward. The whole process was con- ducted through using the MATLAB software as the computational platform and trim solutions agree well with the referenced data. The results show that, numerical continuation is simple and effective, the results are continuous and full-scale, and it＇ s easy to watch the trend of the solution curve. As a computational method, numerical continuation is suitable for helicopter trim calculation.
出处
《直升机技术》
2015年第2期11-15,共5页
Helicopter Technique
