本文選題：氣浮轉(zhuǎn)臺 + 微小干擾力矩��； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著衛(wèi)星技術(shù)的不斷成熟及功能的多樣化要求,微小衛(wèi)星以低成本、功能擴(kuò)展強(qiáng)等優(yōu)點(diǎn)得到了迅速的發(fā)展。在空間中,每個微小衛(wèi)星實(shí)現(xiàn)特定功能并通過多衛(wèi)星組合實(shí)現(xiàn)信息共享和功能協(xié)調(diào),完成復(fù)雜任務(wù)。微小衛(wèi)星以其高性價(jià)比常用于新型任務(wù)的關(guān)鍵技術(shù)驗(yàn)證,為增強(qiáng)空間任務(wù)的可視性以及關(guān)鍵技術(shù)的驗(yàn)證,常在地面進(jìn)行物理仿真實(shí)驗(yàn),通過地面仿真系統(tǒng)實(shí)現(xiàn)關(guān)鍵技術(shù)指標(biāo)的考核。本文源于實(shí)際工程項(xiàng)目,微小衛(wèi)星氣浮仿真轉(zhuǎn)臺最大有效載荷為50Kg,動量輪飽和力矩1m N·m,轉(zhuǎn)臺干擾力矩指標(biāo)為10-5N·m量級。本文主要通過分析轉(zhuǎn)臺干擾力矩的主要來源以及干擾力矩的主要影響因素,在滿足承載和剛度前提下得到氣浮軸承的主要軸承參數(shù)和加工精度。減小轉(zhuǎn)臺的干擾力矩對于地面物理仿真精度以及對于精密儀器的測試精度有著重要的意義。本文主要利用數(shù)值分析以及流體仿真軟件Fluent兩種方法對氣浮軸承的承載能力等靜壓特性進(jìn)行分析,得到轉(zhuǎn)臺在滿足靜態(tài)特性的要求下,氣浮軸承的設(shè)計(jì)參數(shù)。根據(jù)氣浮軸承的靜壓特性設(shè)計(jì)轉(zhuǎn)臺的機(jī)械結(jié)構(gòu),并設(shè)計(jì)了氣浮軸承渦流力矩的補(bǔ)償調(diào)節(jié)裝置來降低轉(zhuǎn)臺實(shí)際的干擾力矩,通過實(shí)驗(yàn)研究得到補(bǔ)償前后的渦流力矩與供氣壓強(qiáng)的影響關(guān)系;針對轉(zhuǎn)臺微小力矩的測量,設(shè)計(jì)了兩種測量方法并進(jìn)行了對比分析,說明了兩種方法的測量原理及優(yōu)缺點(diǎn);搭建了氣浮轉(zhuǎn)臺的地面物理仿真系統(tǒng),基于C++完成了轉(zhuǎn)臺的測試軟件,對微小衛(wèi)星的有效載荷進(jìn)行測試,完成轉(zhuǎn)臺的物理仿真及控制系統(tǒng)的軟件;進(jìn)行地面物理仿真實(shí)驗(yàn),并對轉(zhuǎn)臺的實(shí)際干擾力矩進(jìn)行測量,轉(zhuǎn)臺實(shí)際干擾力矩為2~4×10-5N·m。此外,通過轉(zhuǎn)臺姿態(tài)機(jī)動,比較分析了Simulink數(shù)學(xué)仿真與實(shí)際物理仿真實(shí)驗(yàn)中的穩(wěn)定精度,在微小干擾力矩下,實(shí)際轉(zhuǎn)臺的角度穩(wěn)定精度優(yōu)于0.05°,并對待測陀螺相對基準(zhǔn)陀螺的精度進(jìn)行了實(shí)驗(yàn)分析。
[Abstract]:With the development of satellite technology and the diversification of satellite functions, micro satellites have been developed rapidly with the advantages of low cost and strong function expansion. In space, each microsatellite realizes specific functions and accomplishes complex tasks by means of multi-satellite combination to realize information sharing and function coordination. Microsatellites are often used to verify the key technologies of new missions because of their high performance-to-price ratio. In order to enhance the visibility of space missions and verify the key technologies, physical simulation experiments are often carried out on the ground. The evaluation of key technical indexes is realized by ground simulation system. The maximum payload of the micro satellite air flotation simulation turntable is 50 kg, the momentum wheel saturation moment is 1m nm, and the disturbance torque index of the turntable is 10 ~ (-5) N m. In this paper, the main bearing parameters and machining accuracy of the air bearing are obtained by analyzing the main source of the disturbance moment and the main influencing factors of the disturbance moment on the turntable, and the main bearing parameters and machining accuracy are obtained under the premise of satisfying the bearing load and stiffness. Reducing the disturbance moment of the turntable is of great significance to the precision of the ground physical simulation and the precision of the precision instrument. In this paper, two methods, numerical analysis and fluid simulation software Fluent, are used to analyze the static pressure characteristics of the bearing bearing, and the design parameters of the air bearing are obtained under the requirements of the static characteristics of the turntable. According to the static pressure characteristics of the air bearing, the mechanical structure of the turntable is designed, and the compensation and adjustment device of the swirl moment of the air bearing is designed to reduce the actual disturbance moment of the turntable. The relationship between eddy current torque and air supply pressure before and after compensation is obtained through experimental research, two measuring methods are designed and compared with each other, and the measuring principle, advantages and disadvantages of the two methods are explained. The ground physical simulation system of the air floatation turntable is built, the test software of the turntable is completed based on C, the payload of the micro satellite is tested, the physical simulation and control system software of the turntable is completed, and the ground physical simulation experiment is carried out. The actual disturbance torque of the turntable is 2 脳 10 ~ (-5) N 路m ~ (-1). In addition, through the attitude maneuver of the turntable, the stability accuracy of the Simulink mathematical simulation and the actual physical simulation experiment is compared and analyzed. The angle stability accuracy of the actual turntable is better than 0.05 擄, and the accuracy of the gyroscope relative to the reference gyroscope is analyzed experimentally.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：V416.8

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 王新崗;三自由度氣浮臺渦流力矩的研究[D];哈爾濱工業(yè)大學(xué);2006年

2 宋林;高精度單軸轉(zhuǎn)臺的陀螺測試與建模研究[D];哈爾濱工業(yè)大學(xué);2013年

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本文編號：1845505