一种新型摩擦电液加载系统的设计与验证

发布时间：2018-04-09 08:28

本文选题：摩擦加载　切入点：带载测试　出处：《哈尔滨工业大学学报》2017年07期

【摘要】：为解决传统负载模拟器受到被加载对象运动干扰的问题,提高实验室环境下负载模拟的精度,提出用执行机构或伺服驱动系统带载测试的摩擦电液加载方案.分析传统电液负载模拟器加载性能受被测试设备运动干扰的影响,设计一种基于摩擦加载的主动式电液力矩伺服加载系统.根据加载原理,建立摩擦加载系统的数学模型,分析数学模型结果表明,理想情况下摩擦加载方案不受被加载机构运动的影响.鉴于实际过程中系统存在多种变化参数,特别是具有不确定性和时变性的摩擦,仿真分析摩擦因数变化时摩擦电液加载系统的加载性能.仿真结果表明:传统电液负载模拟器受被测试设备运动影响很大,使得传统电液负载模拟器性能很难进一步提升;相对被动加载的传统模拟器性能,尽管摩擦因数会受相对运动、负载压力和温度等因素的影响在一定范围内变化,但摩擦电液加载系统仍能保持较高的力矩模拟精度.
[Abstract]:In order to solve the problem that the traditional load simulator is disturbed by the motion of loaded object and improve the precision of load simulation in laboratory environment, a triboelectric hydraulic loading scheme with load test by actuator or servo drive system is proposed.An active electro-hydraulic torque servo loading system based on friction loading is designed by analyzing that the loading performance of the traditional electro-hydraulic load simulator is affected by the motion interference of the test equipment.According to the loading principle, the mathematical model of the friction loading system is established. The results show that the friction loading scheme is not affected by the movement of the loaded mechanism under ideal conditions.In view of the fact that there are many variable parameters in the system, especially the friction with uncertainty and time-varying, the loading performance of the friction electro-hydraulic loading system with the variation of friction coefficient is analyzed by simulation.The simulation results show that the traditional electro-hydraulic load simulator is greatly affected by the motion of the test equipment, which makes it difficult to further improve the performance of the traditional electro-hydraulic load simulator.Although the friction coefficient is affected by relative motion, load pressure and temperature in a certain range, the friction electro-hydraulic loading system can still maintain a high torque simulation accuracy.
【作者单位】：哈尔滨工业大学机电工程学院;
【分类号】：TH137

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