基于PSO粒子群算法的LED照明系统光照均匀性研究

实现大功率LED阵列在目标平面上的照度均匀分布对于照明系统具有十分重要的意义。不同于传统解析计算方法，本文采用粒子群（PSO）算法来优化平面随机分布的LED阵列结构，使其在目标光照平面上光照分布均匀。首先推导了LED阵列的照度分布函数，并在此基础上以光照函数的标准差构建一个评价函数，衡量光照分布均匀度。在Matlab中编程获得光照分布最优时候的LED阵列结构数据，并将几何模型导入光学仿真软件Tracepro中进行优化模拟，仿真结果表明该算法有效可行。

Research of Illumination Uniformity for LED Arrays Based on PSO Algorithm

Due to the limitation of single LED, it is of great significance to apply LED arrays to enhance the brightness and enlarge the luminous area to improve the uniformity of illuminace. Different from traditional analytical calculation methods, particle swarm optimization algorithm was proposed to optimize the structure of LED arrays to achieve a good uniform illuminace distribution on the target plane in this paper. Firstly, formulae of illuminance distribution on target plane illuminated by LED arrays were obtained, and then an evaluation function was constructed to measure the uniformity of illuminance distribution. Matlab software was used to calculate the initial structure parameters. Finally, Tracepro optical software was adopted to give an imitation and simulation. The simulation results show that the LED arrays can produce highly uniform illuminace distribution. It indicates that our method is simple and can optimize the LED automatically by computer program.