共查询到20条相似文献,搜索用时 93 毫秒
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NUMERICALSTUDYOFTOPOLOGICALSTRUCTUREOF3DTRANSONICVISCOUSFLOWFIELD(TVFF)INSIDETURBINECASCADEGuoYanhu,ShenMengyu,WangBaoguo(De... 相似文献
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EXPERIMENTAL INVESTIGATION ON THE TURBULENT COHERENT STRUCTURES OF LAMINAR SEPARATION FLOW OVER A BACKWARD FACING STEP 总被引:1,自引:0,他引:1
EXPERIMENTALINVESTIGATIONONTHETURBULENTCOHERENTSTRUCTURESOFLAMINARSEPARATIONFLOWOVERABACKWARDFACINGSTEPWangJinjun;LianQixiang... 相似文献
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TWO-LEVELMULTI-POINTAPPROXIMATIONMETHODFOROPTIMUMDESIGNOFCOMPLICATEDSTRUCTURESHuangHai;XiaRenwei(SchoolofSpaceScienceandTechn... 相似文献
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EXPERIMENTAL INVESTIGATION ON CHANGE OF COLDWORKING RESIDUAL STRAIN OF HOLE IN ALUMINIUM ALLOY SHEET
EXPERiMENTALINVESTIGATIONONCHANGEOFCOLDWORKINGRESIDUALSTRAINOFHOLEINALUMINIUMALLOYSHEETLinYing(ShenyangInstituteofAeronautica... 相似文献
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THESPILLOVERMANAGEMENTINTHEDYNAMICOUTPUTFEEDBACKCONTROLOFFLEXIBLESPACECRAFTTHESPILLOVERMANAGEMENTINTHEDYNAMICOUTPUTFEEDBACKCO... 相似文献
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A problem of the S.S. Balandin free piston scheme unbalance is considered and a variant of complete balancing with the use of the developed scheme with a forked rod is proposed. Experience in the development of an experimental specimen made according to a new scheme with the use of a forked rod is described. 相似文献
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Clark R.N. Fosth D.C. Walton V.M. 《IEEE transactions on aerospace and electronic systems》1975,(4):465-473
A scheme for automatically detecting incipient failures in the feedback sensors (or instruments) of control systems is described. The feasibility of the scheme is investigated by applying it to a simplified version (fourth order) of the flight control system for a hydrofoil boat. A single set of inertial instruments is used to provide the feedback signals; the redundancy which is normally obtained by multiple instrument sets is obtained here, artificially, by a subsystem of multiple Luenberger observers and logic circuits. Tests indicate that scale factor errors, errors due to threshold effects, and bias errors in the instruments are detected as they occur. The tests also indicate further analytical work which should be done to explore the limitations of the basic scheme. 相似文献
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超声速主流中逆向喷流流场的数值模拟 总被引:6,自引:2,他引:6
本文在差分格式NND-2基础上^[1],提出了一个修正格式,形式简单,应用方便。从薄层近似的NS方程出发,用该格式计算了超声速主流中存在逆向喷流的钝体绕流的粘性流场,成功地捕捉到流场内的各种波系和涡系结构。计算的结果与文献[2]中的实验结果比较表明二者符合很好。 相似文献
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基于数字多波束天线的多星测控系统 总被引:1,自引:0,他引:1
针对多星测控存在的问题和技术解决途径,提出采用数字波束形成技术实现单站多星测控的方案,简要说明了系统的体系结构和工作原理,指出了系统特点和技术难点。基于数字多波束天线的多星测控系统具有良好的技术基础和应用前景。 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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A power generation scheme using a synchronous generator with an excitation control system driven by a variable-speed wind turbine is described. The proposed scheme has been analyzed over a wide speed range and under wind gusting conditions. Performance characteristics show that it is feasible to use variable-speed fixed-pitch wind turbines to generate electric power. 相似文献
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In [1] a scheme for forming a rectangular FIR filter bank is described using only a few percent of the number of multiplications required by straightforward procedures. The sidelobe level suffers degradation. Attention is drawn to a different scheme published in [2] and [3] which needs even fewer multiplications without degradationvof the sidelobe level. 相似文献
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Clark R.N. Masreliez C.J. Burrows J.W. 《IEEE transactions on aerospace and electronic systems》1976,(4):459-463
A scheme to provide redundant sensor data in an automatic control system using the principle of functional redundancy is described. Normally there are three redundant radar altimeters used in the terminal phase of automatic landing of jet transport airplanes. This scheme replaces one of these altimeters with a data processing scheme based on a Kalman filter. The filter is driven by altitude rate and acceleration signals from the air data computer and vertical accelerometer. A special initialization technique employs the two altimeter signals. The feasibility of this scheme is indicated by tests in which data obtained from these several sensors during flight tests are used to drive the functionally redundant altimeter. 相似文献