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首页> 外文期刊>Crystal growth & design >Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. II. Cooling Crystallization Experiments
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Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. II. Cooling Crystallization Experiments

机译：反馈控制悬浮液中针状晶体的尺寸和形状演化。 II。 冷却结晶实验

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摘要

The experimental validation of a model-free path following control (PFC) scheme to manipulate the size and shape evolution of needle-like crystals in a seeded, growth-dominated batch cooling crystallization process is presented. To this aim, constant supersaturation control (CSC) and PFC experiments were performed on the needle -shaped compound beta L-glutamic acid. First, the feedback controllers were coupled with an online size and shape monitoring tool. Second, attainable regions for the average particle dimensions of two different seed populations were determined experimentally using the CSC strategy, which enabled selecting reasonable targets in the size and shape space for the PFC experiments. Then, PFC experiments were performed to guide the populations of seed crystals to certain targets within the attainable region exhibiting different average sizes and shapes. The PFC strategy was able to successfully and repeatedly complete this task, thereby operating in a model-free fashion in the sense of not requiring multidimensional crystal growth rate models. The experimental validation underlines the effectiveness and the robustness of this feedback control scheme for the considered process.
机译：对照（PFC）方案进行了无模型途径的实验验证，以操纵针状晶体中针状晶体中针状晶体的尺寸和形状演化。为此目的，在针刺复合β1-谷氨酸上进行恒定的过饱和对照（CSC）和PFC实验。首先，反馈控制器与在线尺寸和形状监控工具耦合。其次，使用CSC策略实验确定两种不同种子群的平均粒子尺寸的可达到的区域，该CSC策略使能在PFC实验的尺寸和形状空间中选择合理的靶标。然后，进行PFC实验以将种子晶体的群引导到具有不同平均尺寸和形状的可达到区域内的某些靶标。 PFC策略能够成功且重复完成这项任务，从而在不需要多维晶体生长速率模型的意义上以无模型方式运行。实验验证强调了该反馈控制方案的有效性和稳健性。

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