【正文】 ton[2]），三樓電梯外人的下降請求信號（ Button[3]）； 電梯內(nèi)人請求到達(dá)一樓的信號（ fllor[0]），電梯內(nèi)人請求到大二樓的信號（ floor[1]），電梯內(nèi)人請求到大三樓的信號（ floor[2]）； 電梯控制信號（ opendoor）； 電梯所在樓層顯示（ position[3..0]）； 電梯 開門狀態(tài)（ door）； 電梯上下指示（ updown） ； 石家莊鐵道大學(xué)四方學(xué)院畢業(yè)設(shè)計(jì) 14 三層電梯的電路總圖 圖 35 電路總圖 三層電梯的引腳分配 圖 36 引腳分配 石家莊鐵道大學(xué)四方學(xué)院畢業(yè)設(shè)計(jì) 15 第 4 章 仿真結(jié)果與說明 圖 41 圖 41 是基本基本功能仿真，使用者在一層電梯外按下上升（ Button(0)=1）按鈕，隨后開門（ door=1）。在電梯上升但未到達(dá)二層時，二層外有人按下上樓（ Button(1)=1）請求，因此當(dāng)電梯到達(dá)二層（ position=2）后停止并開門，待二層使用者進(jìn)入后再完成第一個使用者 的請求到達(dá)三層。首先一外層有人提出上升（ Button(0)=1）請求并按下上升到三層（ floor(2)=1）按鍵，電梯上升過程中二層外分別有人按下上升（ Button(1)=1）和下降（ Button(2)=1）的按鈕，同時三層外有人按下下降（ Button(3)=1）按鈕。 外部請求按鍵較多，電梯在上升過程中只能響應(yīng)高于其當(dāng)前所在樓層的請求，反之在下降過程中只能響應(yīng)低于其當(dāng) 前所在樓層的請求。可以根據(jù)要求打印出各項(xiàng)指標(biāo)參數(shù)和曲線圖及仿真圖，且重復(fù)一次性好。 展望 三層電梯廣泛應(yīng)用在大型的貨運(yùn)之中。 現(xiàn)在我即將揮別自己的大學(xué)生活，萬千感慨上心頭，有對校園和同學(xué)戀戀不舍，更有對美好未來的憧憬。 2021年 5月 [7]SIEMENS公司編著，西門子 (中國 )有限公司譯 [Z]。北京理工大學(xué)出版社， 2021 石家莊鐵道大學(xué)四方學(xué)院畢業(yè)設(shè)計(jì) I 附 錄 附錄 A 外文資料 Building Programmable Automation Controllers with LabVIEW FPGA Overview Programmable Automation Controllers (PACs) are gaining acceptance within the industrial control market as the ideal solution for applications that require highly integrated analog and digital I/O, floatingpoint processing, and seamless connectivity to multiple processing nodes. National Instruments offers a variety of PAC solutions powered by one mon software development environment, NI LabVIEW. With LabVIEW, you can build custom I/O interfaces for industrial applications using addon software, such as the NI LabVIEW FPGA Module. With the LabVIEW FPGA Module and reconfigurable I/O (RIO) hardware, National Instruments delivers an intuitive, accessible solution for incorporating the flexibility and customizability of FPGA technology into industrial PAC systems. You can define the logic embedded in FPGA chips across the family of RIO hardware targets without knowing lowlevel hardware description languages (HDLs) or boardlevel hardware design details, as well as quickly define hardware for ultrahighspeed control, customized timing and synchronization, lowlevel signal processing, and custom I/O with analog, digital, and counters within a single device. You also can integrate your custom NI RIO hardware with image acquisition and analysis, motion control, and industrial protocols, such as CAN and RS232, to rapidly prototype and implement a plete PAC system. Table of Contents Introduction NI RIO Hardware for PACs Building PACs with LabVIEW and the LabVIEW FPGA Module FPGA Development Flow 石家莊鐵道大學(xué)四方學(xué)院畢業(yè)設(shè)計(jì) II Using NI SoftMotion to Create Custom Motion Controllers Applications Conclusion Introduction You can use graphical programming in LabVIEW and the LabVIEW FPGA Module to configure the FPGA (fieldprogrammable gate array) on NI RIO devices. RIO technology, the merging of LabVIEW graphical programming with FPGAs on NI RIO hardware, provides a flexible platform for creating sophisticated measurement and control systems that you could previously create only with customdesigned hardware. An FPGA is a chip that consists of many unconfigured logic gates. Unlike the fixed, vendordefined functionality of an ASIC (applicationspecific integrated circuit) chip, you can configure and reconfigure the logic on FPGAs for your specific application. FPGAs are used in applications where either the cost of developing and fabricating an ASIC is prohibitive, or the hardware must be reconfigured after being placed into service. The flexible, softwareprogrammable architecture of FPGAs offer benefits such as highperformance execution of custom algorithms, precise timing and synchronization, rapid decision making, and simultaneous execution of parallel tasks. Today, FPGAs appear in such devices as instruments, consumer electronics, automobiles, aircraft, copy machines, and applicationspecific puter hardware. While FPGAs are often used in industrial control products, FPGA functionality has not previously been made accessible to industrial control engineers. Defining FPGAs has historically required expertise using HDL programming or plex design tools used more by hardware design engineers than by control engineers. With the LabVIEW FPGA Module and NI RIO hardware, you now can use LabVIEW, a highlevel graphical development environment designed specifically for measurement and control applications, to create PACs that have the customization, flexibility, and highperformance of FPGAs. Because the LabVIEW FPGA Module configures custom circuitry in hardware, your system can process and generate synchronized analog and digital signals rapidly and deterministically. Figure 1 illustrates many of the NI RIO devices that you can configure using the LabVIEW FPGA Module. NI RIO Hardware for PACs Historically, programming FPGAs has been limited to engineers who have indepth 石家莊鐵道大學(xué)四方學(xué)院畢業(yè)設(shè)計(jì) III knowledge of VHDL or other lowlevel design tools, which require overing a very steep learning curve. With the LabVIEW FPGA Module, NI has opened FPGA technology to a broader set of engineers who can now define FPGA logic using LabVIEW graphical development. Measurement and control engineers can focus primarily on their test and control application, where their expertise lies, rather than the lowlevel semantics of transferring logic into the cells of the chip. The LabVIEW FPGA Module model works because of the tight integration between the LabVIEW FPGA Module and the mercial offtheshelf (COTS) hardware architecture of the FPGA and surrounding I/O ponents. National Instruments PACs provide modular, offtheshelf platforms for your industrial control applications. With the implementation of RIO technology on PCI, PXI, and Compact Vision System platforms and the introduction of RIObased CompactRIO, engineers now have the benefi