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无人机助推滑车液压减速制动特性仿真与试验 被引量:2

Simulation and Experimenton UAV Boost Pulley Hydraulic Deceleration Braking Characteristic
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摘要 针对助推滑车液压缓冲冲击压力大,存在爆缸、爆管的风险,采用液压缸外接比例节流阀进行变节流缓冲减速制动助推滑车,使减速制动初期节流面积最大,随助推滑车减速制动位移增加,调节节流背压面积逐渐减小,平稳制动助推滑车,给出了助推滑车变节流液压制动系统原理,建立了变节流液压制动系统数学模型,基于AMESim搭建了助推滑车变节流制动系统仿真模型,进行了助推滑车变节流液压减速制动特性仿真研究,主要开展了系统性能敏感性因素分析。结果表明:采用变节流缓冲制动助推滑车,缓冲缸缸径小且压力冲击低;助推滑车速度和质量对滑车减速制动位移影响小,对缓冲压力影响大;冲击载荷不影响助推滑车最终位移,改变冲击载荷进行仿真,助推滑车制动最终位移保持为2.6 m;缓冲缸缸径对滑车减速制动位移和缓冲缸有杆腔压力影响大,较大缸径可持续降低缓冲缸有杆腔压力,低至4.5 MPa;滑车减速位移实测和仿真误差在0.2 m以内,缓冲缸压力峰值实测和仿真误差在1.0 MPa以内,实测数据和仿真数据趋势一致性较好,验证了助推滑车变节流液压减速制动系统的可行性。 Aiming at the cylinder and pipe explosion risk and the boost pulley hydraulic buffer high impact pressure,the hydraulic cylinder is externally connected with a proportional throttle valve for variable throttle buffer deceleration braking the boost pulley.So as to maximize the throttling area at the deceleration braking.initial stage.As the booster pulley deceleration braking displacement increases,the regulating throttle back pressure area decreases gradually,and the booster pulley is braked stably.The boost pulley variable throttle hydraulic braking system principle is given.The variable throttle hydraulic braking system mathematical model is established.The boost pulley variable throttle braking system simulation model is built based on AMESim.The boost pulley variable throttle hydraulic deceleration braking characteristics simulation study is carried out.The system performance sensitivity factor analysis is mainly carried out.The results show that,when the variable throttle buffer braking is adopted to boost the pulley,the buffer cylinder diameter can be small and and the pressure impact can be low.The boost pulley speed and mass have litle influence on the pulley deceleration braking displacement but have a great influence on the buffer pressure.The boost pulley final displacement is not affected by the impact load.The braking final displacement is maintained at 2.6 m when the impact load is changed.The buffer cylinder diameter has a great influence on the the pulley deceleration braking displacement and the pressure in the buffer cylinder rod cavity.The pressure in the buffer cylinder rod cavity can be continuously reduced to 4.5 MPa with the larger cylinder diameter.The pulley deceleration displacement measured and simulated error is within O.2 m,and the buffer cylinder pressure peak measured and simulated error of is within 1.0 MPa.The measured data and the simulated data trend is consistent,which verifies the feasibility of the the booster pulley variable throttle hydraulic deceleration braking system.
作者 朱恩旭 余阿东 ZHU En-xu;YU A-dong(School of Automotive and Electrical Engineering,Xinyang Vocational and Technical College,Xinyang,Henan 464000)
出处 《液压与气动》 北大核心 2023年第10期136-142,共7页 Chinese Hydraulics & Pneumatics
关键词 无人机 助推滑车 比例节流阀 AMESim 有杆腔压力 减速制动 UAV boost pulley proportional throttle valve AMESim rod cavity pressure deceleration braking
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