共查询到16条相似文献,搜索用时 140 毫秒
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利用γ射线的指数衰减规律,研制放射性的燃油密度传感器,在不同的环境条件下测量燃油密度。本文主要从放射性燃油密度测量传感器的工作原理,数学建模,测量数据分析等方面来论述放射性燃油密度测量技术在飞机燃油系统中的应用。 相似文献
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谐振筒式液体密度传感器的设计 总被引:1,自引:0,他引:1
短筒谐振式密度传感器是以短筒谐振管为核心,基于正反馈原理,由激振元件、拾振元件、谐振子和放大电路组成的高品质闭环谐振系统.采用有限元法分析方法,研究计算了圆筒谐振子的静力学特性和模态响应等动力学特性;设计了短筒谐振管传感器和闭环振荡电路及单片机信号处理系统;分析了温度、压力、黏度等因素对测量结果的影响,对传感器进行了标定,并采用温度补偿方法提高了传感器的测量精度.实验表明20℃时传感器测量结果的不确定度为0.96kg/m3.圆筒谐振燃油密度传感器测量精度达到0.4kg,m3. 相似文献
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主要讨论了飞机燃油量实时测量的有关问题,并就其中燃油密度测量这一关键环节进行了重点论述,对密度测量的重要性、测量方法和国内外的研究状况进行了探讨。 相似文献
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燃油油量传感器的布置是影响燃油指示系统测量精度最重要的因素。本文对油量传感器的布置方法和油量解算的方法展开了研究和讨论,并且分析了单点故障要求下的传感器布置方法,以及如何减小单点故障对精度的影响,同时初步探讨了油箱变形对传感器布置的影响。 相似文献
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Review of fatigue monitoring of agile military aircraft 总被引:1,自引:0,他引:1
Fatigue monitoring of airframes has developed over the decades to the stage where it is now incumbent for all fighter type aircraft to be fitted with an airborne fatigue monitoring system. These systems typically collect operational data for the calculation of the safe-life or the inspection interval of the airframe.
This paper presents a state-of-the-art review of fatigue monitoring systems of agile military aircraft. It reviews and comprehensively examines the techniques used in individual aircraft fatigue monitoring programs, and examines current systems and practises. Based on experience from Australian fatigue monitoring programs, it highlights some of the potential pitfalls in the systems and techniques. It also investigates the issues of strain gauge utilization and calibration, collection of flight parameter data, data integrity, comparisons with fatigue test results and fatigue damage models. Some of the problems with current systems are highlighted and requirements for future fatigue monitoring systems are suggested.
This review has determined that there is little uniformity in the fatigue management practices of operators and that many aspects of the fatigue management process have been overlooked by some structural integrity managers. Also, very few of the papers reviewed specified the philosophy or aims of their monitoring systems. 相似文献
This paper presents a state-of-the-art review of fatigue monitoring systems of agile military aircraft. It reviews and comprehensively examines the techniques used in individual aircraft fatigue monitoring programs, and examines current systems and practises. Based on experience from Australian fatigue monitoring programs, it highlights some of the potential pitfalls in the systems and techniques. It also investigates the issues of strain gauge utilization and calibration, collection of flight parameter data, data integrity, comparisons with fatigue test results and fatigue damage models. Some of the problems with current systems are highlighted and requirements for future fatigue monitoring systems are suggested.
This review has determined that there is little uniformity in the fatigue management practices of operators and that many aspects of the fatigue management process have been overlooked by some structural integrity managers. Also, very few of the papers reviewed specified the philosophy or aims of their monitoring systems. 相似文献
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燃料电池在建筑热电冷三联供中的应用分析 总被引:1,自引:0,他引:1
孙进旭 《制冷空调与电力机械》2005,26(6):40-44
分析了燃料电池的工作原理、种类、性能参数及主要特点,认为燃料电池将有可能发展成为供热、供冷系统的主要热源方式之一,燃料电池热电冷三联供系统是建筑节能的有效途径;介绍了燃料电池在某建筑热电冷三联供系统的应用情况,并分析指出燃料电池在暖通空调领域的研究方向. 相似文献
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为了解决现有燃油评估模型无法准确指导民机市场需求分析和航空碳排放收费政策制定的缺陷,通过对航空公司各主要机型航线生产运营数据的统计分析,运用灰色关联分析法与相关系数法确定了影响航线平均油耗水平的主要宏观影响因素,采用回归分析法分析了机型航线燃油消耗水平与航段距离的关系,并确定了民机设计航程与座位数对线性回归参数的影响,以此构建了民用客机航线平均油耗水平模型的解析表达式。利用11种样本机型产生的275条数据对解析表达式进行参数估计,拟合优度达到0.9979,通过对11种机型产生的16条样本数据进行预测检验,发现统计回归模型的平均相对误差为0.0379,预测精度较高,因此模型切实可行。 相似文献