本文選題：撓性太陽(yáng)帆板 + 姿態(tài)穩(wěn)定��； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：縱觀現(xiàn)如今的航天技術(shù)飛速發(fā)展,不僅衛(wèi)星有效載荷對(duì)能源的需求越來(lái)越大,而且衛(wèi)星的姿態(tài)機(jī)動(dòng)精度、穩(wěn)定度、機(jī)動(dòng)時(shí)間等都提出了更高的要求。所以,如何提高太陽(yáng)能帆板能量的轉(zhuǎn)化效率,如何處理好帶撓性太陽(yáng)帆板衛(wèi)星姿態(tài)控制系統(tǒng)和撓性結(jié)構(gòu)之間的耦合顯得至關(guān)重要。在這種背景下,本文從多角度出發(fā),對(duì)帶太陽(yáng)帆板撓性衛(wèi)星的姿態(tài)穩(wěn)定和驅(qū)動(dòng)機(jī)構(gòu)驅(qū)動(dòng)帆板對(duì)日定向的控制問(wèn)題進(jìn)行了細(xì)致的研究。本文首先研究了撓性衛(wèi)星動(dòng)力學(xué)模型和帆板驅(qū)動(dòng)機(jī)構(gòu)模型,并且考慮了帆板驅(qū)動(dòng)和系統(tǒng)不確定性引起的干擾,建立了帶撓性太陽(yáng)帆板衛(wèi)星的變參數(shù)模型。針對(duì)帶太陽(yáng)能帆板的撓性衛(wèi)星姿態(tài)穩(wěn)定的問(wèn)題和太陽(yáng)帆板對(duì)日定向過(guò)程中驅(qū)動(dòng)機(jī)構(gòu)平穩(wěn)驅(qū)動(dòng)帆板的問(wèn)題,提出了一種基于輸出反饋的PD控制方法,并證明了該控制律在李雅普諾夫意義下穩(wěn)定。以GOES-8號(hào)靜止軌道氣象衛(wèi)星為仿真研究對(duì)象,利用其公布的動(dòng)力學(xué)參數(shù),仿真表明:在PD控制作用下,帆板轉(zhuǎn)速存在明顯振蕩,不能滿足帆板平穩(wěn)驅(qū)動(dòng)的要求。然后,針對(duì)這一問(wèn)題,本文又提出了一種復(fù)合控制的方法。衛(wèi)星姿態(tài)穩(wěn)定采用的是滑模變結(jié)構(gòu)控制,以其對(duì)外部擾動(dòng)和參數(shù)攝動(dòng)引起的不確定性具有魯棒性等優(yōu)點(diǎn)來(lái)應(yīng)對(duì)帆板驅(qū)動(dòng)和系統(tǒng)不確定性引起的干擾,并且還設(shè)計(jì)了步進(jìn)電機(jī)自適應(yīng)電流補(bǔ)償控制器用來(lái)抵消帆板驅(qū)動(dòng)機(jī)構(gòu)摩擦力矩和諧波力矩影響。同樣以GOES-8號(hào)衛(wèi)星為仿真研究對(duì)象,進(jìn)行了三組仿真對(duì)比,分別是姿態(tài)滑模變結(jié)構(gòu)+驅(qū)動(dòng)機(jī)構(gòu)自適應(yīng);姿態(tài)PD+驅(qū)動(dòng)機(jī)構(gòu)自適應(yīng);姿態(tài)滑模變結(jié)構(gòu)+驅(qū)動(dòng)機(jī)構(gòu)PD,驗(yàn)證了滑模變結(jié)構(gòu)+驅(qū)動(dòng)機(jī)構(gòu)自適應(yīng)控制系統(tǒng)的有效性,很明顯地提高了衛(wèi)星姿態(tài)控制的精度和穩(wěn)定度,而且改善了驅(qū)動(dòng)機(jī)構(gòu)驅(qū)動(dòng)帆板對(duì)日定向的精度。
[Abstract]:With the rapid development of space technology nowadays, not only the demand of satellite payload for energy is increasing, but also the attitude maneuvering accuracy, stability, and maneuvering time of satellite are required to be higher and higher. Therefore, how to improve the energy conversion efficiency of solar panels and how to deal with the coupling between satellite attitude control system with flexible solar panels and flexible structures is very important. In this context, the attitude stability of flexible satellite with solar panels and the control of the diurnal orientation of the driving mechanism are studied in detail in this paper. In this paper, the dynamic model of flexible satellite and the driving mechanism model are studied, and considering the disturbance caused by the system uncertainty, a variable parameter model with flexible solar panel satellite is established. A PD control method based on output feedback is proposed to solve the problem of attitude stability of flexible satellite with solar panels and the problem of stationary driving of the driving mechanism in the course of solar panel orientation. It is proved that the control law is stable in the sense of Lyapunov. Taking GOES-8 geostationary orbit meteorological satellite as the simulation object and using its published dynamic parameters, the simulation results show that, under the control of PD, there is obvious oscillation in the speed of the canvas, which can not meet the requirements of the smooth driving of the sailing board. Then, in order to solve this problem, a compound control method is proposed in this paper. Sliding mode variable structure control is used in attitude stabilization of satellite. It is robust to the uncertainties caused by external disturbances and parameter perturbations to deal with the disturbances caused by panel driving and system uncertainties. The adaptive current compensation controller of stepping motor is also designed to counteract the influence of friction moment and harmonic moment of the plate-driven mechanism. At the same time, taking GOES-8 satellite as the simulation research object, three groups of simulation comparisons are carried out, which are adaptive attitude sliding mode variable structure driving mechanism, attitude PD driving mechanism adaptive, and so on. The adaptive control system of sliding mode variable structure driving mechanism is proved to be effective, and the precision and stability of satellite attitude control are obviously improved. Moreover, the precision of driving sail board to day orientation is improved.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：V448.2

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本文編號(hào)：1910473