WU Guofa XU Zhe ZHUO Bing Central Iron and Steel Research Institute
,
Beijing
,
China.
材料科学技术（英）
The optimal control principle and procedure of a tandem cold rolling system for tracking problem have been proposed in this paper for the first time. The state-space description of the tandem cold rolling system for the cold-strip mill of Wuhan Iron and Steel Company is: x_(k+1)=Ax_k+(_k,y_k=Cx_k+η_k The optimum performance index of the system for tracking problem is: J_(min)=minEr[(1/2)sum from k=0 to m e'_kOe_k sum from k=0 to m-1 u'_kRu_k] The authors have deduced the optimal control of the system for tracking problem as follows u_k~*=-S_k(Ay_k+_(k+1)-) the feedback gain matrix S_k is given by S_k=(B'P_(k+1)B-R)~(-1)B'P_(k+1) Pk satisfies the matrix difference equation p_k=P_(k+1)-[(S_k~(-1))'-B']~(-1)R(S_k~(-1)-B)~(-1)+Q with terminal condition P_m=Q. On the above-mentioned principle of optimal control,an optimal control procedure of the tandem cold rolling system has been obtained, and a computer simulation has been performed. The results of the simulation are satisfactory.
关键词:
optimal control
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null
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null
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null
王俊芳
,
周学梅
,
魏文政
表面技术
doi:10.16490/j.cnki.issn.1001-3660.2016.07.030
目的：降低涂层厚度波动范围，提高吸波性能的稳定性。方法通过资料分析，选用空气辅助无气喷涂工艺，综合空气喷涂和无气喷涂工艺的优点，改进喷嘴，实现喷雾流量和雾化幅度等工艺参数的精确控制。进行喷涂参数优化试验和吸波性能检测，获得最佳喷涂工艺。结果采用空气辅助无气喷涂工艺和改进的喷嘴，调节喷幅在5～30 mm，采用5次喷涂，每次喷涂20～24 min，获得的吸波涂层表面平整，没有直径大于50μm的颗粒。喷涂的2 mm厚涂层单位面积厚度的偏差从200μm降低到60μm以下，吸波性能从5 dB降到2 dB以下。结论研制出的吸波涂层精准厚度涂装工艺，可根据涂装基准面的形态和结构选择不同喷幅的喷嘴调节雾化，实现厚涂层吸波涂料的均匀喷涂，大幅度提高吸波涂层的涂装质量。
关键词:
吸波涂层
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涂装
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厚度控制
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气助无气喷涂
