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【正文】 iding scenario, tasks scheduling mechanism, method of information exchanging between tasks, and method of system integration.216。It manages and coordinates each executing of tasks in proper time order and logical relationship to meet the control needs of CNC system.216。There are two different architectures:216。tandem architecture216。interruption architecture. 《 NC Technology 》 E- mail: .Tandem architecture216。 CNC system software: foreground application and background application. 216。 Foreground application is a real time interruption service program, which realizes the real tine functions216。 background application is a loop running program, which realizes the input of part program, do some preparatory processes and manages tasks of procedures. 216。 Foreground and background applications work cooperatively to implement all functions and controls of CNC system. 《 NC Technology 》 E- mail: .Tandem architecture216。The system program can be generally carried out in the following courses:216。 first, system startup216。second, initializing process216。 entering the loop executing of background application. During the executing of background application, real time interruption procedures intervene every now and then to implement every real time controls. 《 NC Technology 》 E- mail: .Tandem architecture《 NC Technology 》 E- mail: .Interruption architecture216。 There is no distinction of background and foreground applications in this architecture. Except for initializing procedure, this architecture divides all control programs into interruption service procedures with different priorities, so that bees a large multilevel interruption system. 216。 The system managing functions are mainly implemented by the munications between interruption service procedures in different levels. 《 NC Technology 》 E- mail: .Interruption architecture《 NC Technology 》 E- mail: .All interruption services《 NC Technology 》 E- mail: .OPEN ARCHITECTURE SYSTEM FOR CNC UNIT 一、開(kāi)放式數(shù)控系統(tǒng)的產(chǎn)生 隨著科技的發(fā)展和生產(chǎn)的需求,需要一種靈活(功能可組、可擴(kuò)展、可添加)的開(kāi)放式數(shù)控系統(tǒng),打破當(dāng)前的 “封閉式的 ”數(shù)控系統(tǒng)。體系開(kāi)放化 定義( IEEE): 具有在不同的工作平臺(tái)上均能實(shí)現(xiàn)系統(tǒng)功能、且可以與其它的系統(tǒng)應(yīng)用進(jìn)行互操作的系統(tǒng) 。開(kāi)放式數(shù)控系統(tǒng)特點(diǎn): ■ 系統(tǒng)構(gòu)件(軟件和硬件)具有標(biāo)準(zhǔn)化 (Standardization)與多樣化 ( Diversification)和互換性 Interchangeability)的特征 ■ 允許通過(guò)對(duì)構(gòu)件的增減來(lái)構(gòu)造系統(tǒng),實(shí)現(xiàn)系統(tǒng) “ 積木式 ” 的集成構(gòu)造,應(yīng)該是可移植的和透明的;《 NC Technology 》 E- mail: .開(kāi)放體系結(jié)構(gòu)開(kāi)放體系結(jié)構(gòu) CNC的優(yōu)點(diǎn)的優(yōu)點(diǎn)216。 向未來(lái)技術(shù)開(kāi)放: 由于軟硬件接口都遵循公認(rèn)的標(biāo)準(zhǔn)協(xié)議,只需少量的重新設(shè)計(jì)和調(diào)整,新一代的通用軟硬件資源就可能被現(xiàn)有系統(tǒng)所采納、吸收和兼容,這就意味著系統(tǒng)的開(kāi)發(fā)費(fèi)用將大大降低而系統(tǒng)性能與可靠性將不斷改善并處于長(zhǎng)生命周期;216。 標(biāo)準(zhǔn)化的人機(jī)界面 :標(biāo)準(zhǔn)化的編程語(yǔ)言,方便用戶使用,降低了和操作效率直接有關(guān)的勞動(dòng)消耗;《 NC Technology 》 E- mail: .開(kāi)放體系結(jié)構(gòu)開(kāi)放體系結(jié)構(gòu) CNC的優(yōu)點(diǎn)的優(yōu)點(diǎn)216。向用戶特殊要求開(kāi)放: 更新產(chǎn)品、擴(kuò)充能力、提供可供選擇的硬軟件產(chǎn)品的各種組合以滿足特殊應(yīng)用要求,給用戶提供一個(gè)方法,從低級(jí)控制器開(kāi)始,逐步提高,直到達(dá)到所要求的性能為止。另外用戶自身的技術(shù)訣竅能方便地融入,創(chuàng)造出自己的名牌產(chǎn)品;216。可減少產(chǎn)品品種 , 便于批量生產(chǎn)、提高可靠性和降低成本,增強(qiáng)市場(chǎng)供應(yīng)能力和競(jìng)爭(zhēng)能力 ?!? NC Technology 》 E- mail: .開(kāi)放式數(shù)控裝置的概念結(jié)構(gòu)硬件配置單元軟件配置單元標(biāo)準(zhǔn)計(jì)算機(jī)硬件數(shù)控系統(tǒng)基本硬件數(shù)控功能應(yīng)用程序DOS(WINDOWS)實(shí)時(shí)多任務(wù)操作系統(tǒng) RTM應(yīng)用程序接口NC構(gòu)件庫(kù)《 NC Technology 》 E- mail: .國(guó)內(nèi)外開(kāi)放式數(shù)控系統(tǒng)的研究進(jìn)展國(guó)內(nèi)外開(kāi)放式數(shù)控系統(tǒng)的研究進(jìn)展1. 幾大研究計(jì)劃– 美國(guó): NGC(The Next Generation Work173。station/Machine Controller)和 OMAC(Open Modular Architecture Controller)計(jì)劃– 歐共體: OSACA( Open System Architecture for Control within Automation Systems)計(jì)劃– 日本: OSEC(Open System Environment for Controller)計(jì)劃– 華中 I型 —— 基于 IPC的 CNC開(kāi)放體系結(jié)構(gòu)– 航天 I型 CNC系統(tǒng) —— 基于 PC的多機(jī) CNC開(kāi)放體系結(jié)構(gòu)《 NC Technology 》 E- mail: .國(guó)內(nèi)外開(kāi)放式數(shù)控系統(tǒng)的研究進(jìn)展國(guó)內(nèi)外開(kāi)放式數(shù)控系統(tǒng)的研究進(jìn)展 :1) CNC可以直接地或通過(guò)網(wǎng)絡(luò)運(yùn)行各種應(yīng)用軟件2)用戶操作界面的開(kāi)放。3) NC內(nèi)核的深層次開(kāi)放 (① PC+實(shí)時(shí)硬插件; ② PC+實(shí)時(shí)軟中斷 )。:1)在控制系統(tǒng)技術(shù),接口技術(shù)、檢測(cè)傳感技術(shù)、執(zhí)行器技術(shù)、軟件 技術(shù)五大方面開(kāi)發(fā)出優(yōu)質(zhì)、先進(jìn)、適銷(xiāo)的經(jīng)濟(jì)、合理的開(kāi)放式數(shù) 控系統(tǒng)。2)主攻方向是進(jìn)一步適應(yīng)高精度、高效率(高速)高自動(dòng)化加工的 需求。3)網(wǎng)絡(luò)化《 NC Technology 》 E- mail: .Homework 216。Explain the position and the functions of each ponent of CNC system.216。How many types of CNC units exist depending on the number of CPU they include? What is the character of each type?216。How many types of CNC software structure are there, and what are their characters and applications? 演講完畢,謝謝觀
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