起模棒 的英文怎麼說
中文拼音 [qǐmóbàng]
起模棒
英文
draw stick-
Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義Then we make a deep research on human visual system and wavelet transformation, and a new wavelet watermarking method based on hvs is proposed to solve the conflict between robustness and imperceptibility
在此基礎上，論文又將人眼視覺系統和小波變換結合在一起，提出了一種基於hvs的小波水印演算法，人眼視覺模型的應用緩解了演算法魯棒性和不可見性間的矛盾。The results showed that in the process of in - situ precipitation cs precipitated layer - by - layer in the template to form 3d layer cs congealation rod by acid - base neutralization of naoh and the amino group of cs. when the process condition was well controlled, it formed homogeneous structure
結果表明：原位沉析法是利用naoh溶液與殼聚糖的氨基起酸堿中和，使殼聚糖分子在模板上原位沉積成三維層狀殼聚糖凝膠棒。Aiming at the uncertainty brought by the rotating inertia and motor torque coefficient during the field weakening process, the mixed sensitivity robust controller based on inner mode principle is designed
在此基礎上，針對實際直流電機速度控制系統弱磁調速過程中存在的電機轉矩系數變化和轉動慣量等因素引起的參數不確定性特性，應用內模原理，設計了混合靈敏度魯棒控制器。A way to avoiding crack or reducing crack width of concrete or reducing distortion of member is using prestressed concrete. the writer tried to make full use of the merit of the prestressed concrete and designed prestressed concrete mandril to control crack of structure. the prestressed concrete mandril, which was firstly applied high pressure on a small concrete bar, and then was made in concrete, so it would act as reinforced bar and resist load. in this thesis the writer designed 24 mmnbers and had experimental study of them, reached the conclusion that the effect of resisting crack of the prestressed concrete mandril was good when the load was not large, it can enhance the capacity of resisting crack and reduce the crack distance and crack width, but when the loads was large, the effect of resisting crack was not good, when we used the prestressed concrete mandril and reinforced bar together in member, the effect of resisting crack was very good. the writer analysed the adherence mechanism and wreck mechanism of the prestressed concrete mandril in anxial tension members, and according to the character of the prestressed concrete mandril, the writer constructed the bond model of it. then the writer introduced the analysis theory of crack including the bond - slip theory, the non - slip theory, the synthesis theory and mathematics stat method. the different theory had different theory base, they considered that the primary affection of crack width was different. in this test, the crack distance and crack width of members which placed reinforced bar were match to the compute value of the code gb 50010 - 2002 very well. to the members which
本文共進行了24根試件的試驗研究，得出了預應力混凝土芯棒能較大地提高構件抗裂承載力，在荷載小於預應力混凝土芯棒的開裂荷載時有較好的抗裂效果，能較大地減小裂縫間距和裂縫寬度，但是當荷載較大預應力混凝土芯棒開裂時預應力混凝土芯棒的抗裂效果不是很好，若將普通鋼筋和預應力混凝土芯棒一起使用時則有很好的抗裂效果。本文分析了預應力混凝土芯棒在軸拉試件中的粘結機理和破壞機理，根據預應力混凝土芯棒本身的特點，提出了預應力混凝土芯棒與后澆混凝土之間的粘結模型。然後本文詳細介紹了經典的裂縫分析理論粘結滑移理論、無滑移理論、綜合理論和數理統計方法，各理論有著各自不同的理論基礎，認為影響裂縫寬度的主要影響因素也各不相同。Simulation results shows that adaptive control algorithm can make the output of aircraft landing gear approach to the reference output rapidly and the control system possess of good performance of robustness. hence, the control method is effective
模擬結果表明:自適應控制演算法能夠使起落架的控制變量快速達到理想的參考模型輸出並且控制曲線平滑，同時控制系統具有很好的魯棒性能，增強了系統的抗干擾能力。A new robust adaptive scheme which are used for tracking of this robot with parametric and bounded external uncertainties is proposed in this thesis. the controller is consist of a controller which is proposed by slotine1 ' 1 and nonlinear continued feedback compensation part. by estimating the unknown physical parameters of robot on - line, it can eliminate the effects result by parameters and external disturbances and guarantee gas and uniform boundedness of parametric estimation. the only information required in setting up the strategy is the output states of jionts, while the inversion of the inertia matrix or estimation the bound of the inertia matrix and measure the jionts accelerations are not needed. it is shown by simulations that the proposed control scheme has quicker convergence velocity and better control precision than paper [ 1 ] and control schemes at present
針對該模型具有參數及有界外部擾動不確定性時提出了一種新的魯棒自適應控制策略，控制器由基於slotine的控制器和非線性連續反饋補償控制器構成。通過在線估計機器人的未知物理參數，有效的消除了由參數及外部擾動所引起的不確定性影響，保證系統達到漸近穩定和參數估計一致有界。與現存的許多控制方法相比，該控制策略不需求解慣性矩陣的逆或估計慣性矩陣的界，不需測量關節加速度，而唯一需要了解的只是系統輸出的位置及速度狀態。So the paper combined the fuzzy logic control and recurrent neural network, and the recurrent fuzzy neural network ( rfnn ) controller is introduced into the speedsensorless vector control system. moreover, an online parameter training methodology, which is derived from the lyapunov stability theorem and gradient descent method is proposed to increase the learning capability of the rfnn. the rfnn controller has a better performance than the pi controller system ; the effectiveness of the proposed control scheme is verified by simulation results
因此論文將模糊控制和具有優越動態性能的遞歸神經網路結合起來，取長補短，提出了一種遞歸模糊神經網路控制方法，利用神經網路來實現模糊推理，可動態的調整隸屬函數的形狀、位置以及神經網路遞歸權值，並對其與pi控制器的交流調速控制系統進行了模擬比較，模擬結果表明與普通的pi控制器相比較，遞歸模糊神經網路控制器有較好的動態性能，控制器的收斂速度快、靜差小，系統在遇到參數發生變化和外部不確定性問題時魯棒性、抗擾動性有明顯的提高。In chapter 5, according to the characteristic in the stage of concept evaluation of product design, the quality attribute preference aggregate model which support multi - attribute and group decision is set forth. according to the model, preference aggregation method based on evidential reasoning and rough set theory and rational evaluation method of multi - attribute and multi - evaluator are put forward. consider the wave of evaluator ' s preference caused by uncertainty, robust of quality attribute and concept in the stage of concept evaluation are put forward for the first time
第五章根據產品設計方案評價的特點，提出了支持多屬性群組評價的質量屬性偏好聚合模型，並提出了基於證據推理與粗集理論的質量屬性偏好聚合方法和理性化的偏好聚合方法；針對由不確定性引起的評價者偏好的波動，首次在方案設計階段根據偏好波動提出了質量屬性和方案魯棒性的概念，給出了質量屬性魯棒性的數學描述和方案魯棒性的計算方法；並且進行了實例應用。The main contents are as follows : the nonlinear caused by actuators are saturation, dead area, margin loop and so on. during the designing of ordinary controller, these characters are regarded as non - modeling dynamic. if dealing with it this way, it will result in adding the requirement of controller ' s robustness
執行機構引起的非線性，包括飽和、死區、回滯等，這些特性在通常的控制設計中被當作未建模動態而不予考慮，但這樣處理將導致對控制器魯棒性要求的增加。First, n - degree of freedom robotic manipulator control problem is studied. on the basis of computed torque ( ct ), the uncertainty is learned by the neural network, and the output of the neural network is used as compensator. this approach overcome the deterioration of control performance due to the uncertainties including working circumstance and load change
針對計算力矩法對模型誤差敏感，魯棒性差的特點，文中將神經網路和計算力矩方法結合，首先根據標稱模型設計計算力矩控制器，然後採用神經網路來學習系統中的不確定性，神經網路的輸出作為補償控制器：有效的克服了機械手由於工作環境和負載變化等不確定性引起的控製品質的破壞。Liquid - solid extrusion of composite material is a new kind of metal forming process, which has been developed in recent years with a promising practical application prospect for its simple working procedure, low cost and good workpiece performance. but it is difficult to set up an accurate mathematical model because the process is a multivariable nonlinear time varying system. so this process ca n ' t be put into practical uses for the difficulties in process parameters control
復合材料管、棒材液-固擠壓成形工藝是近幾年發展起來的一種金屬成形新工藝，具有工序少、成本低、製件性能好等特點，應用前景廣闊，但該工藝是一多變量非線性時變系統，很難建立精確的數學模型，過程參數難于控制，限制了該工藝的實際應用。Combining fuzzy t - s model and adaptive fuzzy logic systems, this paper presents an observer - based fuzzy adaptive control scheme for complex nonlinear systems. meanwhile, the fuzzy adaptive technique, the robust control technique and the differential - geometry - based feedback linearization theory are synthesized organically, this paper presents an adaptive fuzzy tracking control scheme for complex nonlinear systems. finally, a fuzzy reconfigurable control scheme is presented for complex nonlinear systems
文中將模糊t - s模型和自適應模糊邏輯系統有機結合，提出了一套比較實用的基於觀測器的復雜非線性系統的模糊自適應控制方案;同時，將模糊自適應技術、魯棒控制技術和微分幾何反饋線性化理論結合起來，提出了一種復雜非線性系統的自適應模糊跟蹤控制方案;最後，針對復雜非線性系統，給出了一種模糊重構控制方案。Model predictive control ( mpc ), also known as moving or receding horizon control, has originated in industry as a real - time computer control algorithm to solve linear multivariable problems that have constraints and time delays
預測控製作為一種面向實際工業過程發展起來的計算機控制演算法，以其易於建模、控制性能較好、魯棒性強、有效處理約束等特點，一直深受工業控制界的關注。分享友人