新型半主动整星隔振平台及其模糊最优控制研究
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摘要
为降低卫星在发射过程中受到的动态载荷,提出一种采用磁流变阻尼器的新型半主动整星隔振平台。建立隔振平台的动力学模型和柔性卫星隔振系统总体的动力学模型。将LQG最优控制和模糊控制技术相结合应用于半主动整星隔振系统,以卫星振动响应能量和作动器输入能量的加权和最小作为最优控制目标来确定最优控制力,并采用预测状态法进行时滞补偿。以最优控制力和磁流变阻尼器的实际出力作为输入变量,以磁流变阻尼器的控制电流作为输出变量设计模糊最优控制器。仿真分析结果表明:新型半主动整星隔振系统采用模糊最优控制时,在卫星轴向和横向方向上都可取得良好的振动控制效果,并且控制效果明显优于被动控制和限幅最优控制。
When a satellite is launched,it will afford a very high dynamical load.To decrease these dynamical loads,in this paper,a new semi-active whole-spacecraft isolation platform with Magneto-rheological(MR) dampers is proposed.Dynamical model of isolating platform and the whole flexible satellite isolating system is built using Newton-Euler method.LQG optimum control and fuzzy control technique was applied to the whole-spacecraft isolation system,in which the optimum control force was determined by optimizing the weighting sum of the energy of the satellite vibration response and dampers' actuating force.Using the optimum control force and MR dampers' actual force as the input and control electricity imposed on the damper as an output variable,a fuzzy optimal controller is designed and simulated.The result obtained shows that,the performance of vibration attenuation of the satellite isolating platform with a fuzzy optimal control method in the axial and lateral direction is effective and better than passive control strategy and clipping-optimal control method.
When a satellite is launched,it will afford a very high dynamical load.To decrease these dynamical loads,in this paper,a new semi-active whole-spacecraft isolation platform with Magneto-rheological(MR) dampers is proposed.Dynamical model of isolating platform and the whole flexible satellite isolating system is built using Newton-Euler method.LQG optimum control and fuzzy control technique was applied to the whole-spacecraft isolation system,in which the optimum control force was determined by optimizing the weighting sum of the energy of the satellite vibration response and dampers' actuating force.Using the optimum control force and MR dampers' actual force as the input and control electricity imposed on the damper as an output variable,a fuzzy optimal controller is designed and simulated.The result obtained shows that,the performance of vibration attenuation of the satellite isolating platform with a fuzzy optimal control method in the axial and lateral direction is effective and better than passive control strategy and clipping-optimal control method.
引文
[1]Johnson C D,Wilke P.S.Protecting satellite fromthe dynamice of the launch environment[A].AIAASpace 2003 Conference and Exposition[C].LongBeach,2003:1—14.
[2]张军,谌勇,张志谊,等.一种整星隔振器的研制[J].振动与冲击,2005,24(5):35—39.
[3]张军,谌勇,张志谊,等.整星隔振器的隔振性能分析[J].宇航学报,2005,26(增刊):110—114.
[4]刘丽坤,郑钢铁,黄文虎.整星被动多杆隔振平台研究[J].应用力学学报,2005,22(3):329—334.
[5]Liu L K,Zheng G T,Huang W H.Octo-strut vibra-tion isolation platform and its application to wholespacecraft vibration isolation[J].Journal of Soundand Vibration,2006,289(4-5):726—744.
[6]王晓雷,杨庆俊,郑钢铁.整星主动隔振平台研究[J].宇航学报,2007,28(2):438—441.
[7]JEAN Pierrick,OHAYON Roger,BIHAN DominiqueLe.Semi-active control using magnetorheologicaldampers for payload launch vibration isolation[A].Smart Structures and Materials 2006[C].Vol.6169:61690H-1-61690H-10.
[8]Memet Unsal.Semi-active vibration control of a par-allel platform mechanism using magnetorheologicaldamping[D].Florida:University of Florida,2006.
[9]Dyke S J,Spencer B F,Sain M K.Modeling and con-trol of magnetorheological dampers for seismic re-sponse reduction[J].Smart Materials and Struc-tures,1996,5:565—575.
[10]周云,谭平.磁流变阻尼控制理论与技术[M].北京:科学出版社,2007:133.
[11]Yoshida O,Dyke S J.Seismic control of a nonlinearbenchmark building using smart dampers[J].Journalof Engineering Mechanics(ASCE),2004,130(4):386—392.
[12]王昊,胡海岩.整车悬架的最优模糊半主动控制[J].振动工程学报,2005,18(4):438—442.
[13]杨广强,Spencer B F,Carlson J D,等.足尺磁流变阻尼器的建模及动态特性[J].地震工程与工程振动,2001,21(4):8—23.
[14]Zhang L,Yang C Y,Chajes M J,et al.Stability ofactive tendon structural control with time delay[J].Journal of Engineering Mechanics,1993,119(5):1 017—1 024.
[2]张军,谌勇,张志谊,等.一种整星隔振器的研制[J].振动与冲击,2005,24(5):35—39.
[3]张军,谌勇,张志谊,等.整星隔振器的隔振性能分析[J].宇航学报,2005,26(增刊):110—114.
[4]刘丽坤,郑钢铁,黄文虎.整星被动多杆隔振平台研究[J].应用力学学报,2005,22(3):329—334.
[5]Liu L K,Zheng G T,Huang W H.Octo-strut vibra-tion isolation platform and its application to wholespacecraft vibration isolation[J].Journal of Soundand Vibration,2006,289(4-5):726—744.
[6]王晓雷,杨庆俊,郑钢铁.整星主动隔振平台研究[J].宇航学报,2007,28(2):438—441.
[7]JEAN Pierrick,OHAYON Roger,BIHAN DominiqueLe.Semi-active control using magnetorheologicaldampers for payload launch vibration isolation[A].Smart Structures and Materials 2006[C].Vol.6169:61690H-1-61690H-10.
[8]Memet Unsal.Semi-active vibration control of a par-allel platform mechanism using magnetorheologicaldamping[D].Florida:University of Florida,2006.
[9]Dyke S J,Spencer B F,Sain M K.Modeling and con-trol of magnetorheological dampers for seismic re-sponse reduction[J].Smart Materials and Struc-tures,1996,5:565—575.
[10]周云,谭平.磁流变阻尼控制理论与技术[M].北京:科学出版社,2007:133.
[11]Yoshida O,Dyke S J.Seismic control of a nonlinearbenchmark building using smart dampers[J].Journalof Engineering Mechanics(ASCE),2004,130(4):386—392.
[12]王昊,胡海岩.整车悬架的最优模糊半主动控制[J].振动工程学报,2005,18(4):438—442.
[13]杨广强,Spencer B F,Carlson J D,等.足尺磁流变阻尼器的建模及动态特性[J].地震工程与工程振动,2001,21(4):8—23.
[14]Zhang L,Yang C Y,Chajes M J,et al.Stability ofactive tendon structural control with time delay[J].Journal of Engineering Mechanics,1993,119(5):1 017—1 024.
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