基于AHP的MHCPE总体性能评价

针对机械-液压约束活塞发动机的总体性能评价,本文基于层次分析理论,结合机械-液压约束活塞发动机的结构和工作原理,分析确立了影响其总体性能的各分性能及其评价参数,建立了关于机械-液压约束活塞发动机总体性能评价的分层递阶结构模型,同时在yaahp软件平台下进行计算,求得了各评价参数的相对总排序权重值,并对发动机的总体性能通过计算进行综合评价。评价结果表明,发动机总体性能评价的最后分值为7.85,总体性能一般。实际表现在单杠发动机样机的整机高度超出传统发动机约2个活塞行程,外廓尺寸较大,不利于搭载,限制了其适用范围,同时,样机实验过程中,液压泵的容积效率低,机械能向液压能的转换效率低,说明机械结构和液压配流系统有待进一步改进和完善。该研究为机械结构改进和性能优化提供了理论依据。

Overall Performance Evaluation of Mechanical-Hydraulic Confined Piston Engine Based on AHP

For the overall performance evaluation of Mechanical-Hydraulic Confined Piston Engine, the separation performances and their evaluation parameters which affect the overall performance are analyzed and determined combining with its structure and working principle. And also the hierarchical structure model about the overall performance evaluation of Mechanical-Hydraulic Confined Piston Engine is established based on the theory of Analytic Hierarchy Process. Then the relative weight to the total order of the evaluation parameters is calculated with the help of the yaahp software. A comprehensive evaluation is conducted according to the calculation in the end. It reveals that the quantified score refers to the overall performance of the Mechanical-Hydraulic Confined Piston Engine is 7.85 which belongs to a general level. The single-cylinder Mechanical-Hydraulic Confined Piston Engine prototype is about tow piston stokes higher than traditional engines. The large outside dimensions result in carrying difficulties and limited scope. Also the volumetric efficiency of the pump as well as the mechanical energy to hydraulic energy conversion efficiency is lower than expected which express that the mechanical structure and the hydraulic-ori- fice system of the Mechanical-Hydraulic Confined Piston Engine need a further improvement and refining. The study provides a theoretical basis for the further structural improvements and performance optimization.