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双星定位系统是我国自行研制开发的一种区域性卫星定位系统,其定位体制与 GPS 不同,并且其定位精度受到诸多因素的影响,其中星历误差的影响是不可忽略的因素。文中重点研究了星历误差对其定位精度的影响,并推导出了其数学误差模型,在一定条件下给出了其仿真结果,为分析其他误差因素对其定位精度的影响奠定了基础。 相似文献
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对于AirBook这一全新的飞行训练方法,阐述了其新的特点,分析了其组成结构,并且对各个模块的功能进行了探讨,同时给出其逻辑拓扑结构。对基于AirBook的飞行训练模拟的任务开发流程进行了总结并给出其流程框图。最后对AirBook的应用前景进行了阐述。[编者按] 相似文献
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《航空精密制造技术》2015,(3)
针对数控伺服系统中永磁直流无刷电机BLDC(Brushless DC motor),通过建立其数学模型方程,分析了其运动特性,并对其换相进行了研究。结合系统对电机的要求,设计了电机的双环PI调节速度控制策略,最终应用MATLAB搭建其模型,对控制系统进行了仿真验证分析。 相似文献
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零缺陷质量管理探析 总被引:3,自引:0,他引:3
毛建仓 《航空标准化与质量》2001,(6):23-24
分析了零缺陷质量管理的实质 ,论述了其实现的可能性 ,提出了其实现的思路和做法。 相似文献
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《航空精密制造技术》2018,(6)
分析了发动机壳体的性能指标要求和制造技术特点,介绍了其所用材料的发展过程和几种关键加工技术,论述了其各自的加工原理、技术特点和适用范围,并简述了其各自的工艺要点。 相似文献
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介绍了德刚空军未来任务能力对其训练发展提m的新要求,分析了德刚空军训练机构的编制体制变革,详细阐述了其训练体制新发展,最后对其变革方向进行了总结。 相似文献
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Zacharias R. Pennock S. Poggio A. Ray S. 《Aerospace and Electronic Systems Magazine, IEEE》1992,7(1):24-31
Tools and techniques for estimating and measuring coupling and component disturbance for avionics and electronic controls are described. A finite-difference-time-domain (FD-TD) modeling code, TSAR, used to predict coupling is described. This code can quickly generate a mesh model to represent the test object. Some applications as well as the advantages and limitations of using such a code are described. Facilities and techniques for making low-power coupling measurements and for making direct injection test measurements of device disturbance are also described. Some scaling laws for coupling and device effects are presented. A method for extrapolating these low-power test results to high-power full-system effects are presented 相似文献
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The current status and future potential of Maglev systems is reviewed. Modes of noncontact suspension and propulsion are described, and prototype systems and design concepts are indicated. A number of existing systems are described in more detail 相似文献
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地面联合试验台是一项大型综合试验设备,本文从联合试验台测控系统总体设计方案,硬件和软件工程实施的角度,较详细介绍了系统组成,网络实施和软件的开发。 相似文献
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介绍某型号飞机电源系统模拟器的结构和设计原理,详细介绍了C8051F005单片机及其外围的模拟量输入输出电路、数字量输入输出电路、通讯电路和供电电路,并对系统的软件设计进行了阐述。 相似文献
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TECHNIQUE USED INDETECTING EXTRANEOUS HARMONICS FOR VARIABLE SPEED CONSTANT FREQUENCY(VSCF)POWER SUPPLYLiuXiang;DaiJun(Nanjin... 相似文献
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马芬芬 《西安航空技术高等专科学校学报》2008,26(3):53-54
通过对凝结水及其余热回收的经济效益分析,提出了凝结水回收具有重要的节能作用,并从技术上阐述了凝结水回收的方法及技术措施,以便在实际设计、施工中给予重视。 相似文献
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Tsai-Hwa Chen 《IEEE transactions on aerospace and electronic systems》1983,(6):788-794
A new test method to measure the amplitude noise and phase noise in both CW and pulsed CW signals of a Ku-band pulsed Doppler radar is described. These noises are measured in a simulated environment of radar operation; thus the test results may give direct information to determine radar subclutter visibility. In comparison with the conventional noise test method, this new method not only gives more meaningful results but also can obtain results much faster in testing. Actual test system design is described by block diagrams and theoretical analysis. A method to determine approximate frequency jitter in a transmitter signal is also described. 相似文献
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The commenter states that the filters described in the above-mentioned paper by H. Rohling and W. Plagge (see ibid., vol.26, no.6, p.890-6, Nov. 1989) were described in general terms in his articles from 1977-8. The families of binary sequences with minimal or small loss-factors were described by the commenter in earlier publications (1980, 1987). Comparison of the data from these papers and from those of the authors shows that sequences with length 21 and 28 are not optimal.<> 相似文献