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针对被动式混沌微混合器受控性差且加工难度大等缺点,基于广义混沌同步理论,提出了一种运用混沌电场对微流控芯片有序层流流体进行主动混合的电动混沌反控制方法.该方法将Duffing混沌模型施加于微流控芯片混合室的壁面电极,结合微流控芯片微混合室建立控制模型,采用Rosenstein小数据量混沌评价法对流体混沌效果量化评价,进一步优化Duffing混沌反控制算法模型参数.对优化后的混合混沌反控制算法与传统正余弦控制算法进行性能分析.研究结果表明,优化后Duffing算法控制流体进入混沌状态的时间比传统正余弦算法提前了约27.3%,最大Lyapunov指数提高约25%,说明该方法有效地提高了微流控芯片微混合器的混沌混合效果.
Aimed at the disadvantages of passive chaotic micromixer being poorly controlled and difficult to process, based on the generalized chaos synchronization theory, an anti-chaotic control method based on chaotic electric field is proposed for the active mixing of ordered laminar fluid in microfluidic chips. Methods The Duffing chaos model was applied to the wall electrode of the microfluidic chip mixing chamber. The control model was established with the micro-mixing chamber of the microfluidic chip. The Rosenstein method was used to quantify the chaotic effect of the fluid and the Duffing chaos anti-control Algorithm model parameters.Analyzed the performance of the optimized hybrid chaotic anti-control algorithm and the traditional sine cosine control algorithm.The results show that the Duffing algorithm controls the fluid into the chaotic state ahead of the traditional sin-cosine algorithm by about 27.3%, the maximum The Lyapunov exponent is increased by about 25%, which shows that this method effectively improves the chaos mixing effect of microfluidic micro-mixer.