Secondly, introducing the image analyzing technology with reference to the disadvantages of the traditional ferr-graph analysis technology, and with the combination of characteristic parameter optimizing filtration so as to raise a description method of debris micro-morphologic character . thirdly, with the application of mode recognition method, completing the process of debris auto-recognition based on the collected information of the debris configuration characteristics; and conducting the diagnosis on the aero-engine wear faults according to the theory of particle tribology . fourthly, introducing information fusion technology to solve the problem that a single method can not collect enough fault premonitory information to conduct the wear fault diagnosis, hence to conduct the research and exploration in the field of comprehensive diagnosis on the aero-engine's multi-fault premonitory information 本文的研究工作主要包括以下五个部分:首先,介绍航空发动机常见的磨损故障类型,研究磨损故障的失效机理,分析磨粒的产生机理、分类以及形态特征:其次,针对传统铁谱分析技术的缺点,引入图像分析技术,再结合特征参数优化筛选,形成基于图像的磨粒显微形态学特征描述方法:然后,基于提取到的磨粒形态特征信息,应用模式识别方法完成磨粒自动识别,并根据颗粒摩擦学的基本原理进行航空发动机磨损故障的诊断与定位:再后,鉴于单一方法不能提取足够的故障征兆信息进行磨损故障诊断,本文引入信息融合技术,开展航空发动机多故障征兆信息综合诊断方法的研究与探索;最后,基于航空发动机滑油光谱分析与铁谱分析数据,应用时序模型、灰色模型以及组合模型进行磨损故障的预测方法研究。
The paper, being around with the whole technical reconstruction process, chooses each parts of control system that can satisfy with request, and designs plc software controlling the grinding process, and g _ code grinding program . what is more, through taking anti-interference measure and parameter optimizing settle, it guarantees the machine function's stability and optimizing 接着文章围绕设备的改造全过程,选择了能满足项目要求的各控制系统部件,设计了喷油嘴针阀体加工的plc控制软件,以及数控加工程序,并经抗干扰措施和参数整定技术处理,保证了机床性能的稳定和优化。
Based on the characteristics of intense deformation-failure of surrounding rock in a soft and thick coal seam roadway along gob area coal mine, the structure calculating model of original rocks around a roadway along gob area is constructed by knowledge of mechanics, and various bolt-mesh-anchor supporting schemes are simulated and supporting parameters optimized, supporting schemes is proposed, which is secure and economic 摘要针对松软破碎厚煤层综放沿空巷道围岩变形破坏特征,建立沿空巷道原始围岩结构计算模型,模拟计算各种不同支护设计方案,优化支护参数,选定安全经济的支护方案。
In the implementation process, expert knowledge that easy to imply was concluded based on system distinguishing and maintainer's experience . in, the following practice in realization, we put forward parameter optimizing method using statistics theory to optimizing pid parameters, and have comparisons visually on different control policies and parameters 在随后的现场实现过程中,又针对pid控制参数难以整定的问题,创新性地提出了基于数理统计的离线参数寻优方法,通过对误差平方积分等指标的统计,形象地作出了各种控制方法和参数设置下的控制效果横向比较。
We give a new method to handle the problems of item bank composing test papers by use of genetic algorithm, discuss multi-object parameter optimizing problem with restrictions when we use genetic algorithm, and put forward the concept of fonction block, introduce a new code method, cross operator, and mutation operator 摘要给出了利用遗传算法求解试题库自动组卷问题的新方法,讨论了运用遗传算法求解在一定条件下的多目标参数优化问题,提出了功能块的概念,并采用新的编码方法、交叉算子和变异算子。