本文關鍵詞：NURBS曲面數(shù)控加工刀具可行方向計算研究，由筆耕文化傳播整理發(fā)布。

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nurbs曲面

    Study On NURBS Surface Direct Interpolation Algorithm for a New Type Parallel Machine Tool

    面向新型并聯(lián)機床的NURBS曲面直接插補算法研究

短句來源

    Research on NURBS Surface Modeling and Machining System

    NURBS曲面造型與數(shù)控加工

短句來源

    Study on NURBS Surface Modeling and NC Machining Technique of Scattered Data

    散亂數(shù)據(jù)的NURBS曲面建模與數(shù)控加工技術研究

短句來源

    Research on Feasible Tool Orientation Computation for NC Machining of NURBS Surface

    NURBS曲面數(shù)控加工刀具可行方向計算研究

短句來源

    Aimed at the high precision and high efficiency, on the base of a systematic analysis about the forms and characteristics of interference that exit in five-axis complex NURBS surface machining, a partition based interference-free strategy was put forward to obtain the cutter location points from the cutter contact points.

    從高精度、高效率的目標出發(fā),通過系統(tǒng)地分析復雜NURBS曲面的五軸數(shù)控加工過程中可能發(fā)生的各種刀具干涉形式及特征,本文提出了基于曲面離散的“無局部干涉刀軸定位→全局干涉檢測→無干涉刀軸定位”干涉避免策略。 該策略為刀具路徑的高精度、高效率規(guī)劃提供了保證。

短句來源

更多       

    Interpolation Method of NURBS Curved Surface for STEP-NC Control System

    STEP-NC數(shù)控系統(tǒng)的NURBS曲面插補方法

短句來源

    Through the data were preprocessed by PolyWorks to analogically synthesize NURBS curved surface which formed net model to simplify and repair its triangular model.

    通過PolyWorks對數(shù)據(jù)預處理并擬和成NURBS曲面、網(wǎng)格模型生成后再簡化和修補其三角模型。

短句來源

    According to the requirement in developing new generation of STEP-NC control system, the interpolation control method of NURBS curved surface for this new kind of numerical control system was researched. The algorithms for surface information processing, machining path planning and real time locus interpolation involved in this method have been worked out from the research results.

    針對發(fā)展新一代STEP-NC數(shù)控系統(tǒng)的需求,對適合這類新型數(shù)控系統(tǒng)的NURBS曲面插補控制方法進行了研究,給出了該方法涉及的曲面信息處理、加工路徑規(guī)劃和實時軌跡插補算法。

短句來源

    This paper presents a method of the control points inverse calculation of NURBS surface -, surface design and modify which is feasible, and melt it into the UG system. Those modules can remarkably advance the function of surface design in reverse engineering and efficiency of surface modify.

    本文提出的NURBS曲面控制點反算方法、曲面設計和調(diào)整方法是可行的，并將其融入了UG系統(tǒng)，可顯著增強反求工程中曲面設計的功能，提高曲面調(diào)整的效率，可以廣泛應用于各類具有自由曲面外形的產(chǎn)品設計。

短句來源

    It also promotes an algorithm of modifying the boundary data of linear data set so as to perfect the result of surface reconstruction.

    針對NURBS曲面重構方法對邊界數(shù)據(jù)敏感的這一缺點，提出并實現(xiàn)了有序數(shù)據(jù)邊界點的修改算法；

短句來源

    At the end of this paper it gives several examples of surface reconstruction.

    最后給出了NURBS曲面反求原型系統(tǒng)的幾個應用實例。

短句來源

    A NURBS curve and surface reconstruction software based on MicrosoftWindows is developed.

    通過對 NURBS 曲線曲面重構的基本算法的研究，利用可視化技術的優(yōu)勢，采用面向?qū)ο蠹夹g，結合數(shù)據(jù)庫操作，開發(fā)了一個基于微機 Microsoft Windows 系統(tǒng)的 NURBS 曲面重構的軟件NURBSsuf 系統(tǒng)。

短句來源

    From the viewpoint of engineering application, a algorithm of tool path generation for freeform surface based on parameter curves is presented.

    從工程實際應用出發(fā) ,提出了一種適合裁剪NURBS曲面加工基于參數(shù)線的刀軌生成算法。

短句來源

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  nurbs surface

Analysis of antenna around nurbs surface with iterative MoM-PO technique

For more general applications, we show that voxelisation of a NURBS surface can be realised by first converting it into a piecewise rational Bézier surface and then voxelising each of the rational Bézier surfaces.

A PMNS algorithm for contact-impact of NURBS surface objects and dynamic simulation

A New Parameterisation Method for NURBS Surface Interpolation

The model is a combination of two functions: a displacement function and a function for representing an existing NURBS surface called a parent surface.

更多          

n this paper,a new method is presented for planning the motion of a mobile robot moving on general terrains.The terrains are represented by NURBS surfaces and the terrains with obstacles or collisional regions are represented by Trimmed NURBS surfaces. The concept of a geodesic and its computation method, as well as A* search algorithm are used to obtain the path of shortest distance and time optimal path between given any two given points on general terrains.It considers robot vehicle dynamics,terrain topography...

n this paper,a new method is presented for planning the motion of a mobile robot moving on general terrains.The terrains are represented by NURBS surfaces and the terrains with obstacles or collisional regions are represented by Trimmed NURBS surfaces. The concept of a geodesic and its computation method, as well as A* search algorithm are used to obtain the path of shortest distance and time optimal path between given any two given points on general terrains.It considers robot vehicle dynamics,terrain topography and surface features.The paths are represented by NURBS curves.The adaptability and efficiency of this method are shown by experimental results.

本文給出了一種規(guī)劃移動機器人在自然地形中運動的新方法，該方法利用ＮＵＲＢＳ曲面模擬自然地形地貌，以ＴｒｉｍｍｅｄＮＵＲＢＳ曲面描述帶有障礙物或不可逾越區(qū)域的地形，在綜合考慮機器人動力學、地形及障礙描述和曲面特性等各方面因素的情形下，運用測地線的概念和計算方法以及Ａ＊搜索算法，獲得了在自然地形環(huán)境下任意兩點間的距離最短路徑和時間最優(yōu)路徑，，所有的路徑均由ＮＵＲＢＳ曲線表示，實驗結果表明，該方法在性能與效率上均十分令人滿意．

On the basis of the first order derivative equation of B Spline presented by the BOOL, this paper explored the normal unit vector non uniform non rational B Spline surface and NURBS surface.The calculation paradigm have also been presented. This work has established the foundation for the design of NC systems and the simulation of the relative movement of cutting tool to workpiece.

從Ｂ樣條曲線一階導數(shù)公式出發(fā)，推導了非均勻Ｂ樣條曲面、ＮＵＲＢＳ曲面單位法矢量的計算公式，并進行了實例驗證，為復雜自由曲面數(shù)控加工系統(tǒng)設計以及刀具與工件相對運動軌跡的模擬奠定了基礎。

The paper presents a neural network approach to the reconstruction of freeform surfaces for reverse engineering. To evaluate the effectiveness of the approach, a mathematically known surface, a nonuniform B-spline surface, was used for generating a number of samples for training the networks. The trained networks then generated a number of new points which were compared with the calculated points using the known surface equations. The networks structure and modified BP algorithm were also discussed. The results...

The paper presents a neural network approach to the reconstruction of freeform surfaces for reverse engineering. To evaluate the effectiveness of the approach, a mathematically known surface, a nonuniform B-spline surface, was used for generating a number of samples for training the networks. The trained networks then generated a number of new points which were compared with the calculated points using the known surface equations. The networks structure and modified BP algorithm were also discussed. The results show that the approach can be used to reconstruct computer representations of the existing surfaces and to manufacture them. An example is included to illustrate the approach.

提出一種神經(jīng)網(wǎng)絡方法，用于逆工程中自由曲面的重建。討論了網(wǎng)絡結構、修改的ＢＰ學習算法，并給出了網(wǎng)絡重建一個ＮＵＲＢＳ曲面的精度。結果表明該方法可以用來重建已有曲面的數(shù)學模型，進而用于加工這些曲面。

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  本文關鍵詞：NURBS曲面數(shù)控加工刀具可行方向計算研究，由筆耕文化傳播整理發(fā)布。