最大飛行性能 的英文怎麼說
中文拼音 [zuìdàfēihángxìngnéng]
最大飛行性能
英文
gross flight performance- 最 : 副詞(表示某種屬性超過所有同類的人或事物) most; best; worst; first; very; least; above all; -est
- 飛 : Ⅰ動詞1 (鳥、蟲等在空中活動) fly; flit 2 (利用動力機械在空中行動) fly 3 (在空中飄浮遊動) fly...
- 行 : 行Ⅰ名詞1 (行列) line; row 2 (排行) seniority among brothers and sisters:你行幾? 我行三。where...
- 性 : Ⅰ名詞1 (性格) nature; character; disposition 2 (性能; 性質) property; quality 3 (性別) sex ...
- 能 : 能名詞(姓氏) a surname
- 飛行 : flight; flying; aviate; voyage; volitate; hop
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Cnsatm systems will minimise airspace constraints and reduce traffic congestion, and this will enable aircraft to operate within their most optimum flight envelope, commensurate with achieving a marked increase in flight safety
衛星通訊、導航及監察航空交通管理系統可把空域限制減至最少,紓緩交通擠逼,從而讓航機充分發揮其性能,並且大大提升飛行安全。Polarization diversity and maximum ratio combining ( mrc ) is used to restrain the sharp signal fading in the telemetry systems, in which the object is in flight at a high speed and rotating and in low elevation
在信號極化衰弱現象嚴重的環境中對快速飛行目標、低仰角運動目標以及旋轉運動目標等進行遙測接收時,極化分集最大比合成技術可以有效的改善接收性能。Compared with a delta wing aircraft, the double - delta wing configuration has better aerodynamic performance at high angles of attack. an operational analysis was introduced as a method for evaluating training effectiveness of trainer aircraft. approaches to the engineering estimation of aerodynamic characteristics for aircraft with a double - delta wing configuration were studied, and the procedures for determining aircraft performance indices formulated. taking training effectiveness as the objective function and geometric parameters of the wing platform as design variables, through a numerical multivariate optimization arithmetic, the conceptual design optimization for a certain fighter trainer aircraft with double - delta wing configuration was carried out under the constraints of tactical and technical requirements and interrelated geometry. agreement of a calculation example with engineering practice indicates that the optimal design has higher training effectiveness than the baseline design, and in addition, improves the structural force - bearing conditions
雙三角翼氣動布局比三角翼飛機具有更好的大攻角空氣動力特性.引入了評估教練機訓練效能的作戰分析法,研究了雙三角機翼布局飛機空氣動力特性的工程計算途徑以及飛機性能指標的確定方法.以訓練效能作為目標函數並選取機翼平面形狀的幾何參數為設計變量,採用多變量數值尋優方法,在戰術技術指標及相關幾何約束條件下,對某高級教練機的雙三角機翼氣動布局方案進行了優化選擇.算例表明最優方案不僅比原準方案具有更高的訓練效能,還改善了結構的受力情況,與工程實踐吻合Based on the aerodynamic characteristics of space shuttle booster - like missile bodies at angle of attack from 0 to 180, the flying characteristics of high maneuver at 90 angle of attack and velocity consuming at 180 angle of attack are analyzed
摘要以新一代無翼式氣動布局導彈為背景,在大攻角氣動特性理論基礎上,分析了在導彈主動段、攻角在180范圍內變化的導彈飛行特性,得出了90內大攻角最大轉彎能力和180攻角附近最大降速效果的結論。On the basis of collecting and processing many datum and materials. firstly. this paper analyzes main activities and cost constitutions of each stage of the life cycle of a fcs, and lay a foundation for later analysis and evaluation of system lcc. secondly, a basis method and usage range for estimating the system lcc are introduced. a multivariate linear regression model of pcs development cost and cost driven factor is built by use of the parametric method and supplies the base of cost estimation of newly - developed systems. thirdly, combine actual examples and make statistical analysis of lcc of a certain pcs developed by our institute, predict unhappened usage and service cost with grey prediction method, obtain proportion of each constitute to the lcc. forthly, according to actual conditions, use the fuzzy theory to overall evaluate efficacy of the fcs, fifthly, combimng our actual conditions, investigate specific measures of how to implement the life cycle cost management in our institute and put forward a new conception of developing web - based flight control system lcc management information system with pdm as the platform. at last, investigate important factors such as reliability and maintainability that may affect the life cycle cost of the fcs in detail, and put forward specific methods of lowering the life cycle cost of the fcs
論文在收集和整理大量資料的基礎上,首先深入分析了飛控系統壽命周期各階段的主要活動以及各階段的費用構成,為以後系統壽命周期費用的分析和評價奠定了基礎;其次,介紹了壽命周期費用估算的基本方法和使用范圍,並利用參數法建立了飛控系統研製費用與費用驅動因子的多元線性回歸模型,為新研系統的費用估算提供了依據;第三,結合實例對我所研製的某型飛控系統的壽命周期費用進行統計分析,運用灰色預測方法對未發生的使用及維修費用進行預測,得出了該系統的壽命周期費用以及各組成部分所佔比例;第四,根據實際情況,首次運用模糊理論對飛控系統的系統效能進行了綜合評價,構造了飛控系統系統效能模糊綜合評價模型;第五,結合我所實際,探討了如何在本單位實施加強壽命周期費用管理的具體措施,提出以pdm為平臺,開發基於web的飛控系統lcc管理信息系統的新構思;最後,對影響飛控系統壽命周期費用的重要因素如可靠性和維修性等進行了詳細地研究,提出了降低飛控系統壽命周期費用的具體方法。Abstract : a new method, collaborative allocation ( ca ), is proposed to solve the large - scale optimum allocation problem in aircraft conceptual design. according to the characteristics of optimum allocation in aircraft conceptual design. the principle and mathematical model of ca are established. the optimum allocation problem is decomposed into one main optimization problem and several sub - optimization problems. a group of design requirements for subsystems are provided by the main system respectively, and the subsystems execute their own optimizations or further provide the detailed design requirements to the bottom components of aircraft, such as spars, ribs and skins, etc. the subsystems minimize the discrepancy between their own local variables and the corresponding allocated values, and then return the optimization results to main optimization. the main optimization is performed to reallocate the design requirements for improving the integration performance and progressing toward the compatibilities among subsystems. ca provides the general optimum allocation architecture and is easy to be carried out. furthermore, the concurrent computation can also be realized. two examples of optimum reliability allocation are used to describe the implementation procedure of ca for two - level allocation and three - level allocation respectively, and to validate preliminarily its correctness and effectiveness. it is shown that the developed method can be successfully used in optimum allocation of design requirements. then taking weight requirement allocation as example, the mathematical model and solution procedure for collaborative allocation of design requirements in aircraft conceptual design are briefly depicted
文摘:探討了一種新的設計指標最優分配方法- -協同分配法,用於處理飛機頂層設計中的大規模設計指標最優分配問題.分析了飛機頂層設計中的設計指標最優分配特徵,據此給出了協同法的原理並建立了數學模型.協同法按設計指標分配關系將最優分配問題分解為主系統優化和子系統優化,主優化對子系統設計指標進行最優分配,子優化以最小化分配設計指標值與期望設計指標值之間的差異為目標,進行子系統最優設計,或對底層元件(如飛機翼梁、翼肋和翼盒等)進行設計指標最優分配,並把最優解信息反饋給主優化.主優化通過子優化最優解信息構成的一致性約束協調分配量,提高系統整體性能,並重新給出分配方案.主系統與子系統反復協調,直到得到設計指標最優分配方案.兩層可靠度指標分配算例初步驗證了本文方法的正確性與可行性,三層可靠度指標分配算例證明了本文方法的有效性.最後,以重量指標分配為例,簡要敘述了針對飛機頂層設計中設計指標協同分配的數學模型和求解思路A new method, collaborative allocation ( ca ), is proposed to solve the large - scale optimum allocation problem in aircraft conceptual design. according to the characteristics of optimum allocation in aircraft conceptual design. the principle and mathematical model of ca are established. the optimum allocation problem is decomposed into one main optimization problem and several sub - optimization problems. a group of design requirements for subsystems are provided by the main system respectively, and the subsystems execute their own optimizations or further provide the detailed design requirements to the bottom components of aircraft, such as spars, ribs and skins, etc. the subsystems minimize the discrepancy between their own local variables and the corresponding allocated values, and then return the optimization results to main optimization. the main optimization is performed to reallocate the design requirements for improving the integration performance and progressing toward the compatibilities among subsystems. ca provides the general optimum allocation architecture and is easy to be carried out. furthermore, the concurrent computation can also be realized. two examples of optimum reliability allocation are used to describe the implementation procedure of ca for two - level allocation and three - level allocation respectively, and to validate preliminarily its correctness and effectiveness. it is shown that the developed method can be successfully used in optimum allocation of design requirements. then taking weight requirement allocation as example, the mathematical model and solution procedure for collaborative allocation of design requirements in aircraft conceptual design are briefly depicted
探討了一種新的設計指標最優分配方法- -協同分配法,用於處理飛機頂層設計中的大規模設計指標最優分配問題.分析了飛機頂層設計中的設計指標最優分配特徵,據此給出了協同法的原理並建立了數學模型.協同法按設計指標分配關系將最優分配問題分解為主系統優化和子系統優化,主優化對子系統設計指標進行最優分配,子優化以最小化分配設計指標值與期望設計指標值之間的差異為目標,進行子系統最優設計,或對底層元件(如飛機翼梁、翼肋和翼盒等)進行設計指標最優分配,並把最優解信息反饋給主優化.主優化通過子優化最優解信息構成的一致性約束協調分配量,提高系統整體性能,並重新給出分配方案.主系統與子系統反復協調,直到得到設計指標最優分配方案.兩層可靠度指標分配算例初步驗證了本文方法的正確性與可行性,三層可靠度指標分配算例證明了本文方法的有效性.最後,以重量指標分配為例,簡要敘述了針對飛機頂層設計中設計指標協同分配的數學模型和求解思路The problem is then fed to a nonlinear programming routine to solve for all parameters. the flight dynamics model with yawing motion of uh - 60a is given, scale factors of state variables and control variables are applied based on the consideration of algorithm convergence. then, the optimization of trajectories is expressed as optimal control problem with a performance index constrained by helicopter performance limits, faa regulation and so on
首先,建立帶偏航運動的直升機點質量模型,然後對狀態變量和控制變量進行無量綱處理,因為狀態變量和控制變量量值相差較大,這使得優化演算法收斂效果變差,所以需要選擇適當的縮放因子,最後把直升機單臺發動機停車后的飛行軌跡表示成一個最優控制問題,即在考慮直升機性能限制和far規范后,指定一個優化性能指標,選擇合適的路徑約束,然後再解最優控制問題。The paper through to analyse the background, meaning and necessity for implement bidding & tender of online architectural design, through to discript and compare with different mode of domestic and international of application for bidding & tender in network, to propose a unique opinion of solution system which is ndbs mode for bidding & tender of online architectural design, the mode is to submit the whole course of bidding & tender of online architectural design from planning for bid, information issue, pre - qualification, call for bid meeting, tender submit, tender evaluation and confirm the solution to sign the contract in internet. the paper through to structure a bidding platform ( bdb. cn ), to analyse the funcation procedure of bidding and tender system of online architectural design, from the sight of bid invitor, bidder and tender evaluated angle, to link them closely. the paper carry on system design to ndbs mode, input and outut, the information and keep them, safety and data stored, the paper combine with online architectural desigh wenzhou huameng building ( railway station road 1 - 2 massif ) as an example of ndbs mode finally, the result of study indicate, bidding and tender of online architectural design is not only feasible technically, the procedure of bidding and tender accord wigh the law, but also it is unanimous in traditional bidding way, this implement the scheme can improve working efficiency greatly, reduce the cost of bidding effictives, make it standard science further, to realize a pualitative leap in the building management level
論文通過對實施網上建築設計招標投標的背景、意義及必要性進行分析,通過對國內外不同模式招標投標網路應用的綜合敘述與比較,提出了具有獨特見解的系統的網上建築設計招標投標解決方案? ? ndbs模式,該模式是對建築設計招標投標全過程從招標準備、信息發布、資格預審、招標會議、標書遞交、評標決標到合同簽訂的網上解決方案,論文從構建網上招標平臺( bdb . cn )開始,對建築設計招標投標系統的功能流程進行分析,從招標人、投標人和評標人的角度出發,通過對其在整個招標投標活動流程在網際網路中的無縫連接,使得通過bdb . cn招標平臺,能夠達到建築設計招標投標各參與方的一網打盡。論文還對ndbs模式進行了系統設計,對輸入輸出、安全與數據加密和招標投標資料儲存進行設計,從技術的層面對該系統提出了解決的方案。論文最後還結合溫州華盟大廈工程(車站大道1 - 2 #地塊)的網上建築設計招標投標的實例,對ndbs模式進行了實證,研究結果表明,實施網上建築設計招標投標,不僅在技術上是成熟可行的,在工作流程上是符合法律法規的,與傳統的招標投標方式也是一致的,而且能夠大大提高工作效率,有效降低招標投標成本,使得招標投標能夠更加規范、科學,實現建設管理水平的一個質的飛躍。The main results are : supersonic region and subsonic region can co - exist in flow path simultaneously, subsonic flow is insignificance for engine performance ; total pressure of primary rocket should be decreased when mach number is increased. in the experimental aspect, some components of ejectorjet experimental system were improved, ejectorjet experiments using alcohol as secondary fuel were conducted
由數值計算獲得的結論為:引射火箭內的一般流態為超音速區與亞音速區共存,亞音速區不具備做功能力;飛行馬赫數增大,引射火箭內更易於產生壅塞;為了獲得最佳的性能,隨著飛行馬赫數的提高,應當降低一次火箭的工作壓強。The design of modem airplane is a kind of large and complex system engineering that includes various specialties, and the newly technical achievement of the various specialties should be utilized multipurposly only when the traditional engineering specialty and the special engineering specialty should be synthesized and managed effectively, the design quality will be improved insuring the airplane not only may meet the requirement of technical and tactical aims, but also has the well economy and tactical perfectness, so as to meet the requirement of anny with lower maintenance expenses
現代飛機設計是一項十分龐大、眾多學科專業高度交互的系統工程,要綜合利用眾多學科的最新技術成果。只有把傳統的工程專業與特殊的工程專業予以綜合,實施行之有效的現代化管理,才能提高飛機的設計質量,保證設計出的飛機既滿足戰術技術指標的要求,又有良好的經濟性和戰備完好性,實現以較低的維修保障費用滿足部隊的使用要求。At the same time, a series of development trend in organization structure innovation under the information environment has been put forward : flat model is the basis of organization structure optimization ; flexibility not only is beneficial to organization creation, innovation and accelerating reaction speed, but also strengthens organization ' s control centripetal force during the process of being operated continuously. it has rapid adjusting ability in time according to unexpected results of predictable change ; networking can not only decrease internal management cost and realize integration between supply chain and sale chain in worldwide, but also realize enterprise " s completely authorized managemen in order to promote substantial leap in enterprise economic benefit ; virtual model is centralizing limited resources on high additional value function and making low additional value virtual in order that the largest resource support can be obtained in the lowest cost and the whole organization is operated in the most effective way for adapting to market " s rapid change with high elasticity ; creating learning pattern in organization makes enterprise expand the width and depth of information being exchanged with the outer so as to keep enterprise in an unassailable position
提出信息化環境下組織結構創新的一系列發展趨勢:扁平化是組織結構優化的基礎;柔性化既有利於組織的創造、革新、加快反應速度,又能使組織在不斷磨合中加強控制的向心力,具有適時根據可預期的變化的意外結果迅速調整的能力;網路化不僅減少了內部管理成本、實現了企業全世界范圍內供應鏈與銷售環節的整合,而且實現了企業充分授權式的管理,極大地促進了企業經濟效益,實現質的飛躍;虛擬化是將有限的資源集中在附加值高的功能上,而將附加值低的功能虛擬化,以最小的代價獲得最大的資源支持,從而使整個組織以最有效的方式運轉,以高彈性化來適應市場的快速變化;創建學習型組織,使企業拓展了與外界進行信息交流的廣度和深度,使企業立於不敗之地。Boeing is likely to launch its latest jetliner without a u. s. customer. it tentatively will offer a new 200 - seat jet for sale to japan ' s two biggest airlines
波音是可能的沒有一個美國顧客運行它的最近的噴射客機。它將嘗試性地提供到日本的2架最大的飛機待售的一口新的200位子噴氣。分享友人