| 基于状态空间模型的飞行器装配误差敏感度研究 |
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| 引用本文： | 孙崇飞,李欣,朱一鸣,尚建忠,罗自荣,何立军.基于状态空间模型的飞行器装配误差敏感度研究[J].农业机械学报,2020,51(5):421-426. |
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| 作者姓名： | 孙崇飞 李欣 朱一鸣 尚建忠 罗自荣 何立军 |
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| 作者单位： | 国防科技大学智能科学学院,长沙410073;山东理工大学机械工程学院,淄博255049;国防科技大学脉冲功率激光技术国家重点实验室,合肥230037;曼彻斯特大学机械、航天与土木工程学院,曼彻斯特M17JR;国防科技大学智能科学学院,长沙410073;陆军勤务学院训练基地,武汉430035 |
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| 基金项目： | 国家自然科学基金项目（51675527） |
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| 摘 要： | 飞行器具有零部件多、结构复杂和装配精度要求高等特点,其装配有安全性装配、少可逆性装配等要求。根据飞行器相关的关键产品特性(Key product characteristic,KPC)和关键控制特性(Key control characteristic,KCC)参数,提出一种基于状态空间模型的装配误差敏感度量化分析方法,将飞行器多舱段精密装配过程中的误差敏感度分为3级指标,并进行阐述和定义。通过联立飞行器状态空间模型和输出方程,得到输入向量和输入矩阵的关系,进而求出状态转换矩阵,得到不同级别误差敏感度的理论表达式。将随机产生服从正态分布的装配特征误差代入系统矩阵,运用蒙特卡洛(Monte Carlo)仿真对不同装配特征的敏感度指标进行计算,并对比分析理论计算和蒙特卡洛仿真求得的特征级敏感度指标值。研究表明,将动态系统灵敏度分析方法应用到多工位装配过程可行,所提出的基于状态空间模型的飞行器装配误差敏感度分析方法合理,对飞行器舱段精密装配过程的精度评估具有参考意义。
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| 关 键 词： | 飞行器 装配误差敏感度 状态空间模型 关键产品特性 关键控制特性 |
| 收稿时间： | 2019/12/20 0:00:00 |
Sensitivity Analysis of Aircraft Assembly Error Based on State Space Model |
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| SUN Chongfei,LI Xin,ZHU Yiming,SHANG Jianzhong,LUO Zirong,HE Lijun.Sensitivity Analysis of Aircraft Assembly Error Based on State Space Model[J].Transactions of the Chinese Society of Agricultural Machinery,2020,51(5):421-426. |
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| Authors: | SUN Chongfei LI Xin ZHU Yiming SHANG Jianzhong LUO Zirong HE Lijun |
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| Institution: | National University of Defense Technology;Shandong University of Technology;University of Manchester; Army Logistical University |
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| Abstract: | The aircraft has the characteristics of many parts, complicated structure and high assembly accuracy requirements, and its assembly has requirements for safety assembly and less reversible assembly and so on. Based on the key product characteristics (KPC) and key control characteristics (KCC) parameters of aircraft, a theoretical method for assembly error sensitivity quantification analysis based on the state space model was proposed. And the error sensitivities in the precision assembly process of the butted joint assembly of the aircraft were elaborated and defined, which were divided into three levels: feature level, position level and system level. The relationship between input vector and input matrix was obtained by solving the state space model of aircraft and its output equation, and the state transition matrix was obtained, and then the theoretical expressions of different levels of error sensitivity were obtained. The random assembly feature error value which obeys normal distribution was substituted into system matrix. Monte Carlo simulation was used to calculate the sensitivity indexes of different assembly features. And the sensitivity indexes of feature level obtained by theoretical calculation and Monte Carlo simulation respectively were compared and analyzed. The results showed that it was feasible to apply the sensitivity analysis method of dynamic system to the accuracy prediction and analysis of the butted joint assembly of the aircraft. The analysis method of aircraft assembly error sensitivity analysis based on state space model proposed was accurate and reasonable. This research method had positive significance for the accuracy evaluation of the butted joint precise assembly process of the aircraft. |
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| Keywords: | aircraft assembly error sensitivity state space model key product characteristics key control characteristics |
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