機械外文翻譯--分布式機床的設計-資料下載頁
2025-05-12 00:03本頁面
【導讀】統(tǒng)的CNC用于機床上。該系統(tǒng)是由一套以微處理機為基礎(chǔ)。的模塊利用FLP實時網(wǎng)絡相互聯(lián)接的。使每個模塊智能化以提高整個系統(tǒng)的靈活性和容錯能力。傳感器評價和執(zhí)行器調(diào)節(jié)。FIP決定了這些模塊之間的通訊 ，同時執(zhí)行任務分配以及設備布局分布。我們討論一些分布標準并描述實驗的執(zhí)。成上發(fā)揮主要作用。在機床控制域，目前CNC技術(shù)有它內(nèi)在的缺點。器技術(shù)和通信網(wǎng)絡的迅速發(fā)展使分布式控制成為可能。代硬件更換但分布式控制系統(tǒng)的性能，模塊化，完整性和可靠性正在提高。據(jù)采集和預處理”的一步。FIP允許各種各樣的布局，最長。轉(zhuǎn)移必須遵守時間要求。FIP采用生產(chǎn)者和消費者的模樣來產(chǎn)生可變交流。在第一種情況下，theBusArbiter根據(jù)從配置要求價。值相應的標識定期轉(zhuǎn)移。查限位開關(guān)以使網(wǎng)絡能定期無重大延誤的傳輸數(shù)據(jù)。它被映射到微機的提供用戶界面的節(jié)點上。用來處理計劃收購和儲存，不同
【正文】 ork like FIP is then a good solution. 4. Experimental implementation As shown in Fig. 3, our application is aiming to realize a distributed twoaxis machinetool control system. It is posed of the following devices distributed on four nodes over FIP fieldbus: node1: a microputer (i80486 microprocessor). It is used as operator terminal, node 2. 3: two identical nodes. Each consists of a microputer (i80486) equipped with a motion controller (DCX PClOO+DCX MC 100). node 4: a PLC (LT 100) with sensors/actuators for auxiliary operations. work: FIP with 1Mbits/s over twisted pair medium is chosen. The software architecture of the implemented system is based on the concept of multilayered distributed control. It has a threelevel hierarchy and the distribution is realizes at the second and the third levels. It consists the following layers: Analysis layer: performs selection of the control tasks It is mapped on to the microputer of node 1 which provides an user interface. It deals with the program acquisition and storage, switches the different operational modes (manual and automatic modes), putes and sends the start and arrival points coordinates as well as other orders to each other node respectively. Rule layer: determines the control algorithms for a given task. It is mapped on to the two other microputers (node 2 and 3) which function is elementary displacements calculation (by interpolation) according to the given parameters and orders ( trajectory type, speed, acceleration,. etc.). One of the software design difficulties is the interpolation algorithms for each axis. Because after axis control distribution, the calculation of the intermediate coordinates of each axis bees independent, the coherence of these axis should be ensured by correct algorithm design. Process layer: executes the control. It includes the two motion controllers and the PLC. These devices executes servo system motion control, handles the workpart holding/tightening, tools switch tasks and monitors system safety by evaluation of sensors and regulation of actuators. In order to verify if the proposed architecture is suitable with time constraints and work capacity, in is necessary to estimate the expected traffic. There are mainly two natures of information exchanges: ●orders from central decision station (node 1) to other stations. ●state information produced by the stations ( node1) to other stations. For example concerning our experimental platform, we have delined some variables distributed as following: Fig3 Hardware implementation 5. Conclusion ln this paper, we investigated a distributed machinetool architecture in order to meet CIM requirements. Our research reached the step of validation through the realization of an experimental implementation. We currently work on the simulation and performance analysis of the operating architecture to justify that the implementation meets realtime constraints. Our objective is not only an experimental prototype, but also the development of the theoretical methodology for the design, optimization of this distributed system.
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