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压电液压马达的性能分析与测试

Keywords: 压电叠堆, 压电泵, 压电液压马达, 驱动器, 液压缸??

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Abstract:

为满足大行程、高输出力精密驱动与控制的需求,提出一种压电叠堆隔膜泵驱动的压电液压马达,建立了理论模型并进行了仿真分析.给出了刚度匹配时最佳面积比及最佳负载的确定方法.设计制作了试验样机,测试了半径比对其性能的影响规律.在工作频率为280 Hz时,半径比为0.8马达的输出功率是半径比为0.53马达输出功率的4.43倍,这说明选取合理的结构参数可有效地提高马达性能.理论分析结果表明,负载一定时,存在最佳的结构参数(刚性顶块与泵腔的半径比、泵腔与液压缸面积比)使马达速度及功率最大、最佳面积比随半径比增加而减小.结构参数一定时,速度随负载增加而降低、存在最佳负载使输出功率最大,且最佳负载随面积比及半径比增加而降低

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