Linear parameter varying control design for rotating systems supported by journal bearings

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• 作者：Adriano Almeida Gonç ; alves Siqueira^a ; ¹ ; ^{siqueira@sc.usp.br} ; Rodrigo Nicoletti^a ; ¹ ; ^{rnicolet@sc.usp.br} ; Nicklas Norrick^b ; ² ; ^{norrick@sdy.tu-darmstadt.de} ; Ká ; tia Lucchesi Cavalca^c ; ^{katia@fem.unicamp.br} ; Helio Fiori de Castro^c ; ³ ; ^{heliofc@fem.unicamp.br} ; Jens Bauer^b ; ⁴ ; ^{bauer@sdy.tu-darmstadt.de} ; Fadi Dohnal^b ; ⁴ ; ^{dohnal@sdy.tu-darmstadt.de}
• 刊名：Journal of Sound and Vibration
• 出版年：2012
• 期刊代码：91_0022460x
• 类别：ph
• 出版时间：7 May, 2012
• 卷：331
• 期：10
• 页码：2220-2232
• 文件大小：997 K

摘要

Linear parameter varying (LPV) control is a model-based control technique that takes into account time-varying parameters of the plant. In the case of rotating systems supported by lubricated bearings, the dynamic characteristics of the bearings change in time as a function of the rotating speed. Hence, LPV control can tackle the problem of run-up and run-down operational conditions when dynamic characteristics of the rotating system change significantly in time due to the bearings and high vibration levels occur. In this work, the LPV control design for a flexible shaft supported by plain journal bearings is presented. The model used in the LPV control design is updated from unbalance response experimental results and dynamic coefficients for the entire range of rotating speeds are obtained by numerical optimization. Experimental implementation of the designed LPV control resulted in strong reduction of vibration amplitudes when crossing the critical speed, without affecting system behavior in sub- or super-critical speeds.