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针对直升机操纵助力器工作时高频动载叠加静载气动载荷扰动的特点,设计了模拟高频动载叠加静载的电液加载系统对助力器进行加载。采用静载与高频正弦动载叠加的液压加载系统对助力器进行仿真。建立了电液加载系统的数学模型,在编制的操纵谱和加载谱条件下进行了系统的负载轨迹分析,得到了负载轨迹的解析表达式,进一步得到负载轨迹区域的外包络线的解析表达式。按照加载系统动力机构负载最佳匹配原则的优化设计方法,通过特征点组合并结合实际加载需求进行了液压动力机构参数的优化设计。
Aiming at the characteristics of high-frequency dynamic load and static disturbance pneumatic load when helicopter manipulating booster works, an electro-hydraulic loading system simulating high frequency dynamic load and static load is designed to load the booster. The booster is simulated by hydraulic loading system with static load and high frequency sinusoidal dynamic load. The mathematical model of the electro-hydraulic loading system is established. The system load trajectory analysis is carried out under the prepared operating spectrum and loading spectrum. The analytic expression of the load trajectory is obtained, and the analytical expression of the outer envelope of the load trajectory area is obtained. formula. According to the optimal design method of the best matching principle of load on the power system of the system, the optimal design of the parameters of the hydraulic power mechanism was carried out through the combination of the characteristic points and the actual load requirements.