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基于IFOA的MEMS加速度计无转台标定 被引量:5
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作者 戴洪德 郑伟伟 +2 位作者 郑百东 戴邵武 王瑞 《北京航空航天大学学报》 EI CAS CSCD 北大核心 2021年第10期1959-1968,共10页
为提高微机电系统(MEMS)加速度计的标定效率并降低对高精度转台的依赖,提出一种基于改进果蝇优化算法(IFOA)的MEMS加速度计无转台标定方法。首先,根据模观测标定法原理将加速度计标定问题转化为非线性函数优化问题。然后,针对经典果蝇... 为提高微机电系统(MEMS)加速度计的标定效率并降低对高精度转台的依赖,提出一种基于改进果蝇优化算法(IFOA)的MEMS加速度计无转台标定方法。首先,根据模观测标定法原理将加速度计标定问题转化为非线性函数优化问题。然后,针对经典果蝇优化算法存在的只能搜索正参数及搜索步长固定的不足,对味道浓度判定值及搜索步长进行改进,使改进后的算法具有全局参数搜索及可变步长2种性能,并利用Rosenbrock函数进行测试,结果表明,IFOA相比于经典果蝇优化算法具有全局参数寻优范围及更高的寻优精度。最后,将IFOA应用于求解加速度计待标定参数的非线性函数优化问题,并将结果与牛顿迭代法和粒子群优化(PSO)算法进行对比。仿真结果表明:IFOA在求解精度方面比牛顿迭代法提高了1~3个数量级;在运行稳定性方面比牛顿迭代法和PSO算法分别提高了30%和34%,在运行时间方面分别减小了15.2%和43.6%;在加速度计无转台标定方面具有良好的应用价值。 展开更多
关键词 微机电系统(MEMS) 加速度计 标定 模观测法 果蝇优化算(FOA)
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Design of observer-based discrete repetitive-control system based on 2D model
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作者 王昭鸿 易灵芝 +1 位作者 兰永红 陈才学 《Journal of Central South University》 SCIE EI CAS 2014年第11期4236-4243,共8页
A discrete observer-based repetitive control(RC) design method for a linear system with uncertainties was presented based on two-dimensional(2D) system theory. Firstly, a 2D discrete model was established to describe ... A discrete observer-based repetitive control(RC) design method for a linear system with uncertainties was presented based on two-dimensional(2D) system theory. Firstly, a 2D discrete model was established to describe both the control behavior within a repetition period and the learning process taking place between periods. Next, by converting the designing problem of repetitive controller into one of the feedback gains of reconstructed variables, the stable condition was obtained through linear matrix inequality(LMI) and also the gain coefficient of repetitive system. Numerical simulation shows an exceptional feasibility of this proposal with remarkable robustness and tracking speed. 展开更多
关键词 state observer two-dimensional discrete system repetitive control linear matrix inequality
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