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Discrete-time frequency-shaping parametric LQ control with application to active seat suspension control

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3 Author(s)
Cheok, K.C. ; Sch. of Eng. & Comput. Sci., Oakland Univ., Rochester, MI, USA ; Hu, H.X. ; Loh, N.K.

The theory of a discrete-time parametric linear quadratic (PLQ) control is extended to a class of frequency-shaped performance measures. The incorporation of frequency-dependent weighting matrices allows the emphasis or de-emphasis of the importance of the system variables being penalized over specific bands of frequencies. Results are presented for constant-gain and dynamic output feedback configurations of frequency-shaping optimal control. The resultant control is applied to the design of active seat suspension control. The active suspension maximizes ride comfort by discriminatory minimization of average whole-body absorbed power over a band of frequencies that causes the most discomfort to a human being

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Industrial Electronics, IEEE Transactions on  (Volume:36 ,  Issue: 3 )