controller synthesis for disturbance rejection

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Hari 2015-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/239811-controller-synthesis-for-disturbance-rejection

Hello all,

I need to design a stabilizing controller K (for known s-plane transfer function models G and H, both containing delay terms;pade approximated) such that the bode magnitude of the closed-loop transfer function G/(1+K*H) is minimized in a certain frequency range of interest. Basically, the idea is to attenuate the magnitude of the open loop transfer function G in that frequency range.

I looked up Hinfinity methods but couldn't quite get them to work for this problem.

Any suggestions on how to achieve this using MATLAB would be greatly appreciated. Thanks a lot for your attention!