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本文研究了零动态非渐稳的单输入单输出控制系统的局部渐近镇定问题,讨论了对这种系统镇定的设计方法,并对一类满足条件(H)的系统,利用Hopf分岔控制的结果,提供了构造反馈控制函数使上述系统局部渐近镇定的方法,同时,这个结果也可以看作是对Hopf分岔控制在一些情况下的一种简化,为得到上述结果,本文还研究了一类鲁棒稳定性问题。 相似文献
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The formation process of pseudo-spherical α-Fe2O3 particles obtained through the hydrolysis of 0.01 mol·L-1 FeCl3 solution was studied by means of TEM and XRD. The results show that the growth of α-Fe2O3 nuclies is through the diffusion mechanism. Although the presence of CTAB in the FeCl3 solution has no effect on the growth process of pseudo-spheric α-Fe2O3 particles, more uniform particles are obtained, and the particles are self-assembled to form two-dimensional ordered structure due to the effect of CTAB. The optical character of these α-Fe2O3 particles was investigated, and the band-gap of which is about 2.49 eV. 相似文献
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