Inflow Models in Trim and Dynamics Response of Helicopter
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摘要: 以常规单旋翼带尾桨直升机为对象,讨论均匀与非均匀入流模型对直升机飞行数值仿真的影响.以Pitt/Peters的动力入流模型为基础,讨论均匀与非均匀入流模型对直升机配平的影响,并分别采用非均匀静态入流、均匀与非均匀动力入流模型,分析直升机在低速、中速和高速前飞时对驾驶员操纵输入动态响应数值仿真的精度及影响程度,为不同目的飞行数值仿真中入流模型的选取提供有益的参考.本文以美国UH-60A黑鹰直升机为对象进行了数值仿真与对比分析.Abstract: For the current helicopter of single main rotor with tail rotor, the effect of inflow models with different characteristics on helicopter trim and digital simulation was discussed. Based on Pitt/Peters' first order dynamics nonuniform inflow model, the effect of uniform and nonuniform inflow models of main rotor on helicopter trim, and the effect of uniform and nonuniform dynamics inflow models of main rotor on helicopter dynamics response to pilot control input at different forward flight speed states, were analyzed, which could provide useful reference to chose the proper inflow model of main rotor for different flight digital simulation. The sample of UH-60A Black Hawk helicopter was used for the calculation and analysis.
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Key words:
- helicopters /
- flight mechanics /
- mathematical models /
- digital simulation /
- inflow dynamics /
- non-linear system
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