| 基于HSMM的两阶段设备缺陷状态识别方法* |
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| 引用本文： | 王宁,孙树栋,蔡志强,李淑敏.基于HSMM的两阶段设备缺陷状态识别方法*[J].计算机应用研究,2011,28(12):4560-4563. |
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| 作者姓名： | 王宁 孙树栋 蔡志强 李淑敏 |
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| 作者单位： | 西北工业大学机电学院现代设计与集成制造教育部重点实验室,西安,710072 |
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| 基金项目： | 航空科学基金资助项目(2010ZD53039)；陕西省自然科学基金资助项目(2010HQ8005) |
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| 摘 要： | 针对传统马尔可夫模型(HMM)状态停留时间必须服从指数分布假设的不足,提出了一种基于隐半马尔可夫模型(HSMM)的两阶段设备缺陷状态识别方法.首先,通过分析HSMM模型的参数构成及基本特点,并结合两阶段设备的劣化过程特点提出合理的假设条件,建立起用于描述两阶段设备运行状态的HSMM模型；其次,针对HSMM模型的参数估计问题,引入最大似然估计法,并提出了小样本条件下求解状态持续时间的方法；再次,基于建立的HSMM模型,给出了两阶段设备缺陷状态早期识别的计算公式及步骤,通过对状态停留时间的概率估计实现了对缺陷状态的早期识别；最后,通过计算机仿真方法模拟了HSMM模型的建模、参数估计及缺陷状态识别过程,从而验证了该方法的有效性和准确性.
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| 关 键 词： | 状态识别 延迟时间 隐半马尔可夫模型 两阶段设备 |
Method of limitation state recognition for two stage equipment based on HSMM |
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| WANG Ning,SUN Shu-dong,CAI Zhi-qiang,LI Shu-min.Method of limitation state recognition for two stage equipment based on HSMM[J].Application Research of Computers,2011,28(12):4560-4563. |
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| Authors: | WANG Ning SUN Shu-dong CAI Zhi-qiang LI Shu-min |
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| Affiliation: | WANG Ning,SUN Shu-dong,CAI Zhi-qiang,LI Shu-min(1.Ministry of Education Key Laboratory of Contemporary Design & Integrated Manufacturing Technology,School of Mechantronics,Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | This paper proposed a method of limitation state recognition based on hidden semi-Markov model(HSMM) for two stage equipment to overcome the disadvantages of traditional hidden Markov model(HMM),which hypothesized that the system state durations must submit to the exponential distribution.First,it analyzed the structures and characteristics of HSMM,and established a practical HSMM for two-stage equipment according to reasonable assumptions on the basis of system degradation process.Then,for the parameter es... |
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| Keywords: | state recognition delay time hidden semi-Markov model(HSMM) two-stage equipment |
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