皮卫星具有成本低、反应灵敏等特点,是航天领域的研究热点。由于体积和质量的限制,大卫星复杂的星载计算机系统结构并不适用于皮卫星。介绍基于COTS器件的皮卫星星载计算机系统模块化设计技术,将多准则决策方法 TOPSIS排序法应用于皮卫...皮卫星具有成本低、反应灵敏等特点,是航天领域的研究热点。由于体积和质量的限制,大卫星复杂的星载计算机系统结构并不适用于皮卫星。介绍基于COTS器件的皮卫星星载计算机系统模块化设计技术,将多准则决策方法 TOPSIS排序法应用于皮卫星的芯片选型。研制2版基于不同低功耗微控制单元的计算机原理样机,并通过大量实验测试比较2版原理样机的速度、功耗、运行温度等性能。当工作温度为27℃,主频为8 MHz时,基于MSP430芯片和ATxmega芯片的原理样机的MIPS值分别为7.449和6.781;运行加法运算的时间分别为0.613μs和1.381μs,功耗分别为38.224 m W和54.411 m W。在-40℃-85℃时,原理样机均可正常工作。展开更多
Aiming at the contradiction between the depth control accuracy and the energy consumption of the self-sustaining intelligent buoy,a low energy consumption depth control method based on historical array for real-time g...Aiming at the contradiction between the depth control accuracy and the energy consumption of the self-sustaining intelligent buoy,a low energy consumption depth control method based on historical array for real-time geostrophic oceanography(Argo)data is proposed.As known from the buoy kinematic model,the volume of the external oil sac only depends on the density and temperature of seawater at hovering depth.Hence,we use historical Argo data to extract the fitting curves of density and temperature,and obtain the relationship between the hovering depth and the volume of the external oil sac.Genetic algorithm is used to carry out the optimal energy consumption motion planning for the depth control process,and the specific motion strategy of depth control process is obtained.Compared with dual closed-loop fuzzy PID control method and radial basis function(RBF)-PID method,the proposed method reduces energy consumption to 1/50 with the same accuracy.Finally,a hardware-in-the-loop simulation system was used to verify this method.When the error caused by fitting curves is not considered,the average error is 2.62 m,the energy consumption is 3.214×10^(4)J,and the error of energy consumption is only 0.65%.It shows the effectiveness and reliability of the method as well as the advantages of comprehensively considering the accuracy and energy consumption.展开更多
文摘皮卫星具有成本低、反应灵敏等特点,是航天领域的研究热点。由于体积和质量的限制,大卫星复杂的星载计算机系统结构并不适用于皮卫星。介绍基于COTS器件的皮卫星星载计算机系统模块化设计技术,将多准则决策方法 TOPSIS排序法应用于皮卫星的芯片选型。研制2版基于不同低功耗微控制单元的计算机原理样机,并通过大量实验测试比较2版原理样机的速度、功耗、运行温度等性能。当工作温度为27℃,主频为8 MHz时,基于MSP430芯片和ATxmega芯片的原理样机的MIPS值分别为7.449和6.781;运行加法运算的时间分别为0.613μs和1.381μs,功耗分别为38.224 m W和54.411 m W。在-40℃-85℃时,原理样机均可正常工作。
基金Qingdao Entrepreneurship and Innovation Leading Researchers Program(No.19-3-2-40-zhc)Key Research and Development Program of Shandong Province(Nos.2019GHY112072,2019GHY112051)Project Supported by State Key Laboratory of Precision Measuring Technology and Instruments(No.pilab1906).
文摘Aiming at the contradiction between the depth control accuracy and the energy consumption of the self-sustaining intelligent buoy,a low energy consumption depth control method based on historical array for real-time geostrophic oceanography(Argo)data is proposed.As known from the buoy kinematic model,the volume of the external oil sac only depends on the density and temperature of seawater at hovering depth.Hence,we use historical Argo data to extract the fitting curves of density and temperature,and obtain the relationship between the hovering depth and the volume of the external oil sac.Genetic algorithm is used to carry out the optimal energy consumption motion planning for the depth control process,and the specific motion strategy of depth control process is obtained.Compared with dual closed-loop fuzzy PID control method and radial basis function(RBF)-PID method,the proposed method reduces energy consumption to 1/50 with the same accuracy.Finally,a hardware-in-the-loop simulation system was used to verify this method.When the error caused by fitting curves is not considered,the average error is 2.62 m,the energy consumption is 3.214×10^(4)J,and the error of energy consumption is only 0.65%.It shows the effectiveness and reliability of the method as well as the advantages of comprehensively considering the accuracy and energy consumption.
