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首页> 外文期刊>Journal of the American Helicopter Society >On the Modeling of Hydraulic Components in Rotorcraft Systems
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On the Modeling of Hydraulic Components in Rotorcraft Systems

机译：旋翼飞机系统中液压元件的建模

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摘要

A physics based methodology for modeling of hydraulic devices within multibody-based comprehensive models of rotorcraft systems is developed. The proposed models are developed in two stages. At first, models are developed for three basic hydraulic elements: the hydraulic chamber, the hydraulic orifice and the pressure relief valve. These models consist of nonlinear differential equations involving empirical parameters. Next, these basic elements are combined to yield device models for linear hydraulic actuators, simple hydraulic dampers, and hydraulic dampers with pressure relief valves. The proposed hydraulic device models are implemented in a multibody code and calibrated by comparing their predictions with test bench measurements for the UH-60 helicopter lead-lag damper. While predicted peak damping forces are found to be in good agreement with measurements, the model does not predict the entire time history of damper force to the same level of accuracy. The validated model of the UH-60 lead-lag damper model is coupled with a comprehensive model of the vehicle. Measured aerodynamic loads are applied to the blade and predicted damper forces are compared with experimental measurements. A marked improvement in the prediction is observed when using the proposed model rather than a linear approximation of the damper behavior.
机译：在旋翼飞机系统的基于多体的综合模型中，开发了一种基于物理的液压装置建模方法。提出的模型分两个阶段开发。首先，针对三种基本液压元件开发了模型：液压腔，液压孔口和泄压阀。这些模型由涉及经验参数的非线性微分方程组成。接下来，将这些基本元素组合起来，以产生用于线性液压执行器，简单液压阻尼器和带有泄压阀的液压阻尼器的设备模型。所提出的液压设备模型以多​​体代码实现，并通过将其预测与UH-60直升机超前减震器的测试台测量结果进行比较来进行校准。虽然发现预测的峰值阻尼力与测量值非常吻合，但是该模型并未将阻尼力的整个时间历史预测到相同的精度水平。 UH-60超前滞后阻尼器模型的经过验证的模型与车辆的综合模型结合在一起。将测得的空气动力学载荷施加到叶片上，并将预测的阻尼力与实验测量值进行比较。当使用建议的模型而不是阻尼器行为的线性近似时，可以观察到预测的显着改善。

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