基于虚拟样机的智能塑壳断路器操作机构模糊可靠性和模糊稳健设计技术研究

发布时间：2018-05-08 02:22

本文选题：塑壳断路器 + 虚拟样机　；参考：《河北工业大学》2014年博士论文

【摘要】：低压智能塑壳断路器是智能配电网中关键的保护电器，其可靠性直接影响着低压智能电网的安全可靠运行。操作机构是智能塑壳断路器的核心部件，本文以某智能塑壳断路器操作机构为研究对象，研究了虚拟样机技术和模糊可靠性技术以及模糊稳健设计技术相结合的优化设计方法。文中介绍了智能塑壳断路器操作机构的虚拟样机刚性模型、参数化模型和柔性模型的建模方法。针对智能塑壳断路器的异形主转轴机械特性测试孔难于定位加工的问题，提出一种基于机器视觉技术的平面三点圆心定位方法。搭建了智能塑壳断路器机械特性测试试验台。验证了智能塑壳断路器操作机构虚拟样机模型的有效性。提出一种虚拟样机技术与模糊可靠性技术相结合的弹簧优化设计方法。首先利用虚拟样机优化操作机构驱动弹簧的刚度系数，然后结合模糊可靠性设计技术，以弹簧质量最轻为目标函数，建立弹簧的模糊可靠性优化数学模型，，优化出操作机构驱动弹簧的具体结构参数。综合考虑智能塑壳断路器操作机构的手动分闸和自由脱扣两种运动规律，并考虑操作机构在设计制造和使用过程中各种模糊因素对主转轴运动精度的影响，提出一种虚拟样机技术和多目标模糊稳健设计技术相结合的优化设计方法。利用该方法对智能塑壳断路器的操作机构进行了优化设计，并利用ADAMS/Insight的蒙特卡罗方法对优化结果进行了分析。研究表明，利用虚拟样机技术与模糊可靠性和模糊稳健设计技术相结合的方法，优化设计出的智能塑壳断路器的操作机构体积小、分断速度快、且可靠性和稳健性高，符合智能塑壳断路器的发展趋势。
[Abstract]:Low-voltage intelligent plastic case circuit breaker is a key protective apparatus in smart distribution network. Its reliability directly affects the safe and reliable operation of low-voltage smart grid. The operating mechanism is the core part of the intelligent plastic case circuit breaker. In this paper, the optimal design method combining the virtual prototype technology with the fuzzy reliability technology and the fuzzy robust design technology is studied with the operation mechanism of an intelligent plastic case breaker as the research object. In this paper, the virtual prototype rigid model, parametric model and flexible model of intelligent plastic case circuit breaker operating mechanism are introduced. In order to solve the problem that it is difficult to locate and process the testing holes for the mechanical characteristics of the special-shaped main shaft of the intelligent plastic case circuit breaker, a plane three-point centroid location method based on machine vision technology is proposed. An intelligent testing bench for mechanical characteristics of plastic case circuit breaker is built. The validity of the virtual prototype model of intelligent plastic case circuit breaker operating mechanism is verified. A spring optimization design method combining virtual prototype technology and fuzzy reliability technology is proposed. Firstly, the stiffness coefficient of the driving spring of the operating mechanism is optimized by using the virtual prototype, and then the mathematical model of the fuzzy reliability optimization of the spring is established with the minimum mass of the spring as the objective function and the fuzzy reliability design technology. The structure parameters of the operating mechanism drive spring are optimized. Considering two kinds of movement laws of intelligent plastic case circuit breaker operating mechanism, manual opening and free release, and considering the influence of various fuzzy factors on the movement precision of main shaft in the process of design, manufacture and use of the operation mechanism. An optimal design method combining virtual prototyping and multi-objective fuzzy robust design is proposed. The operation mechanism of intelligent plastic case circuit breaker is optimized by using this method, and the optimization results are analyzed by ADAMS/Insight Monte Carlo method. The research shows that the intelligent plastic case circuit breaker designed by using the method of combining virtual prototyping technology with fuzzy reliability and fuzzy robust design technology has the advantages of small size, fast breaking speed, high reliability and robustness. Accord with the development trend of intelligent plastic case circuit breaker.
【学位授予单位】：河北工业大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM561

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