Improved Algorithm of Variable Bandwidth Kernel Particle Filter

Aiming at the large cost of calculating variable bandwidth kernel particle filter and the high complexity of its algorithm, a self-adiusting kernel function particle filter is presented. Kernel density estimation is facilitated to iterate and obtain new particle set. And the standard deviation of particle is introduced in the kernel bandwidth. According to the characteristics of particle distribution, the bandwidth is dynamically adjusted, and the particle distribution can thus be more close to the posterior probability density model of the system. Meanwhile, the kernel density is used to estimate the weight of updating particle and the system state. The simulation results show the feasibility and effectiveness of the proposed algorithm.     

对部分零件角度允差的初步认识

正确地认识零件的角度允差,对确保产品质量,提高劳动生产率,恰当地鉴别零件是否合格,节省大量的计量时间,改进设计,促进标准化,提高零件工艺性等均有一定的意义。现将我们在实际工作中碰到的一些问题和处理办法归纳如下。