【作者】 魏玉东；

【导师】 黄田； 杨志永；

【作者基本信息】 天津大学 ， 机械制造及其自动化， 2008， 博士

【摘要】 论文结合小鸭集团产品-滚筒洗衣机实际工程需求,在建立系统动力学模型的基础上,系统研究了关键零部件参数的动态优化设计方法,最后通过商用CAE软件和实验验证了该方法的有效性。论文取得了以下结论与成果:(1)根据滚筒洗衣机结构,并考虑实际工况,利用矢量法建立了洗衣机的六自由度动力学模型。在此基础上,分析了洗衣机中各关键零部件参数对外筒振幅的影响规律,研究了系统运动过程中的两种平衡方式(液压平衡与固体平衡器),并最终遴选出最佳平衡方案。(2)根据虚拟样机设计过程流程,在商用软件平台Pro/E与MSC. ADAMS上运用多体动力学理论进行滚筒洗衣机整机建模,分析了系统的动态特性与振动机理。(3)在对各关键零部件参数灵敏度分析的基础上,揭示出各部件参数对外筒振幅的影响规律。利用虚拟样机技术,以滚筒洗衣机外筒径向振动幅值均方根值为目标,采用线性规划方法对参数化样机模型进行优化设计。(4)基于Simulink和MSC. ADAMS软件建立了滚筒洗衣机的机电一体化联合仿真模型,并在Simulink环境中完成了联合仿真计算,研究了不同工况和运动状态下的控制器参数对系统动态特性的影响规律。(5)以PC+NI USB9233数据采集卡为关键部件搭建实验硬件平台,以图形化语言LabView为平台搭建系统数据采集软件。在该实验平台上,验证了上述理论与方法的正确性和有效性。上述研究成果,不仅对滚筒洗衣机关键部件的参数设计具有一定的指导作用,而且还将对物理样机的维修提供了很好的理论依据。更多还原

【Abstract】 In accordance with the demand from Xiao Ya Group Co. Ltd, this dissertation deals with the dynamic design of a rolling washing machine for the vibration and noise reduction. The parameters affecting the dynamic characteristics of the system are optimized and its effectiveness is verified via computer simultation and experiments The mains achievements and conclusions are summaried as follows.(1) According to the structure of rolling washing maching, its 6-dof dynamic model is formulated using the vector method with the consideration of real working condition. The vibration amplitude of outer barrel of washing machine is adopted as specification to investigate the law of key parts on it. The two balancing ways are also dicussed here in the running state, and the optimal balancing format is chosen by the comparison.(2) The virtual prototype technique is introduced, and process analysis on it is also studied here. The flow chart is drawn and multi-body modeling theorem is explained in the next which used in the commercial MSC. ADAMS software. Based on the above, the Pro/E and MSC. ADAMS is adopted to build the virtual prototype of washing machine for the research on its dynamic characterisitics.(3) The sensitivity analysis is investigated in order to achieve the influencing degree of different parameters on vibration amplitude of outer barrel of rolling washing machine. Furthermore, its mean square root value of vibration is used as cost function, and linear programming method is acquired to optimize the parameters of key parts.(4) The mechatronic model of rolling washing machine is established using the commercial Matlab/simulink and MSC. ADAMS software for futher investigation of its quality. The co-simulation is then finished in the simulink environment to achieve the law of controller parameters on dynamic characteristics of system.(5) The PC+NI USB9233 acquring board is utilized for hardware platform of experiment, and graphic language LabView is used for acquiring software. Based on this platform, the above theory and approaches are validated. The above researches, not only give guide to parameter design of key parts of roller washing machine, but also offer good theory gist for the development of physical prototype.更多还原