【正文】 ?Data display: save and display the collected data in charts。?Automatic/manual locking: choose the Automatic/manual mode to perform the unlocking power supply poweroff ,the feedback voltage test, and DC and AC supply poweroff。?Choosing the load power supply: choose a specific load power supply relevant to a certain experiment, for instance, the positivenegative power supply for electric instruments。?? Control and monitoring are realized by highly reliable filed bus, monitoring the fixed power values, the current outputs and the voltage outputs。?? The progresses of poweron and poweroff can be disturbed by manpower when necessary。?? One channel of DC unlocking power supply, with the fixed value of 27V。I. INTRODUCTION The application environments of the modern missile systems are more and more plex. And the control accuracy is requested to be much stricter[1]. To analysis the missile properties in plex applications, a special kind of digital power supply system for gyroscope turntables is needed so that various working conditions, which missiles often go through, can be simulated by gyroscopes during the semiphysical simulation and the performance evaluating[]. Experiments have shown that the control accuracy and the control stability are major factors for the gyroscope error, so the digital power supply should be characterized by steady frequency, steady phase and low harmonic distortion[4]. At the same time, enough output power, longterm operation capacity and strong antiinterference are also contained. The digital power supply system, which satisfies the requirements of semiphysical simulation and performance evaluating, integrates puter technique, field bus technique [5] and digital control technique[6] pletely. In the system software, the control program on the host puter is developed by the Lab Windows/CVI language, taking full advantages of its favorable humanputer interaction interface and the abundant library functions[9]. The data storage and display together with the munication between the host and guest puters are realized by serial port functions. In another aspect, the guest puter is developed by embedded C language, making the best of the high efficiency to collect the working data and process the messages in real time[10,12]. The system can be integrated in the semiphysical simulation system effectively, realizing test parameters management, automatic poweron progress and charts of the data display.A. The developing requirements of the system According to semiphysical simulation experiment test steps and performance evaluating requirements, the digital power supply system should be featured as following:?? One channel of alternating current (AC for short) 36V,with the load capacity of 2A and the alternative frequencies: 400Hz or1000Hz。 digital power supply。 Control and Simulation Technology. Beijing: National Defense Industry .(in Chinese)[3] Liu Z Zh, Wei H L. System Simulation. Beijing: Beijing Institute OfTechnology . (in Chinese)[4] Wang Ch Y. Gyroscopes Stable System. Beijing: National Defense Industry . (in Chinese)[5] Yang H X. Field Bus Technology and Application. Beijing: TsinghuaUniversity . (in Chinese)[6] Donald D. Givone. Digital Principles and Design. Beijing: TsinghuaUniversity .(in Chinese)[7] Houpis, Lamont. Digital Control SystemPrinciple, Hardware and Software. Beijing: Aviation Industry . (in Chinese)[8] Liu J H, Virtual Instrument Design Based On Lab Windows/CVI. Beijing: Publishing House of Electronics Industry. 2003. (in Chinese)[9] Wang J X, Yang SH F, Sui M L. Lab Windows/CVI Test Technology and Project Application. Beijing: Chemical Industry . (inChinese)[10] Brian W. Kernighan, Dennis M. Ritchie, The C Programming Language. Beijing: China Machine . (in Chinese)[11] Zhang J, Song Microcontroller C Language Program Demo. Beijing: Publishing House of Electronics . (in Chinese)[12] Richard Barnett, Larry O’ Cull, Sarah Cox. Embeded C Program andAtmel AVR. Beijing: Tsinghua University . (in Chinese)[13] Liu H L, Xiao B, Wang L H. Parameter detection of a certain missilecontrol casing based on virtual instrument technology. Chinese Journal of Scientific Instrument. （ 4 ） ： 257259. (in Chinese)[14] Liang Q Y, Dong E SH, Dong Y G, etc. Research on the virtual instrumentbased integrated test system for aircraft electrical powersystem. Chinese Journal of Scientific Instrument. （4）： 22022205. (in Chinese)[15] Li X, Yang S Ch, Zheng S L, etc. Power Unit Observation System Based on Virtual Instrument. Ordnance Industry （1）：8182. (in Chinese) Xudan XuSchool of Automation Science and ElectricalEngineering, Beihang UniversityHaidian, Beijing, ChinaEmail: xxdTianpeng Yu, Yue MaShanxi North Huifeng Machinery amp?？傊?它完全符合實(shí)際使用。但這用于實(shí)驗(yàn)足夠真實(shí)的使用。這個(gè)圖左邊的是給定信號和正確跟蹤結(jié)果。這個(gè)功能在之后也使得系統(tǒng)空間耗盡。這減少了運(yùn)營商的風(fēng)險(xiǎn)。網(wǎng)絡(luò)連線是基于以太網(wǎng)在一些電腦之間建立的,服從TCP / IP協(xié)議,使用實(shí)驗(yàn)室Windows /CVI提供的開發(fā)功能。所以這里使用一個(gè)計(jì)時(shí)器,記錄時(shí)間,以確保正確的時(shí)間選擇打開解鎖供應(yīng)。當(dāng)前的有點(diǎn)過頭,直到最后到達(dá)穩(wěn)定點(diǎn),。在這些里面,。 電力供應(yīng)的陀螺儀轉(zhuǎn)盤有嚴(yán)格的要求開機(jī)的順序。根據(jù)具體測試要求選擇某些特殊渠道。圖2 執(zhí)行軟件結(jié)構(gòu)模塊圖3 控制軟件操作界面圖4 控制程序結(jié)構(gòu)塊 考慮到實(shí)際負(fù)載連接隨不同的測試任務(wù),測試參數(shù)是不同的。 軟件運(yùn)行前,用戶首先在“參數(shù)配置”平面配置所有的參數(shù)。具體結(jié)構(gòu)如圖4?；谶@種模式,控制程序有一個(gè)“等待用戶的命令,判斷命令和根據(jù)命令發(fā)送控制指令”的結(jié)構(gòu)。實(shí)驗(yàn)室的Windows/CVI是一種面向?qū)ο蟮拈_發(fā)語言。B 、實(shí)現(xiàn)軟件控制 這部分軟件由美國國家儀器(NI短路)的實(shí)驗(yàn)室Windows /CVI通過舒適的人機(jī)交互界面開發(fā)的。 確保輸出精度的三相功率供應(yīng),交流輸出是完全控制另一個(gè)單片機(jī)(單片機(jī)2)。同時(shí),它在FIFO中讀取指令定時(shí)中斷,然后控制硬件來執(zhí)行,收集到的數(shù)據(jù)發(fā)送到主機(jī)電腦。A、 實(shí)現(xiàn)軟件執(zhí)行 這部分由嵌入式c語言進(jìn)行軟件開發(fā)。這個(gè)結(jié)構(gòu)執(zhí)行硬件的分離控制程序,因?yàn)榇蠖鄶?shù)實(shí)驗(yàn)室Windows /CVI舒適的人機(jī)交互接口的特點(diǎn)和簡單可操作性,所以可以充分地利用硬件[9]。軟件開發(fā)的控制在主機(jī)上(工業(yè)計(jì)算機(jī)),軟件開發(fā)的執(zhí)行在分機(jī)上(單片機(jī))。 基于上述要求一起發(fā)展其他的半物理仿真試驗(yàn)及有關(guān)電路實(shí)驗(yàn)要求,軟件的數(shù)字電源應(yīng)該符合函數(shù)如下: 參數(shù)配置:初始化串口,相關(guān)在某種實(shí)驗(yàn)中在每個(gè)通道預(yù)先安排電壓值和頻率值； 選擇負(fù)載電源:相關(guān)的某種實(shí)驗(yàn)中選擇一個(gè)特定的負(fù)載電源,例如,電動(dòng)工具供應(yīng)正負(fù)電源； 自動(dòng)/手動(dòng)解鎖:選擇自動(dòng)/手動(dòng)模式來執(zhí)行三相接通電源的電壓,負(fù)載電流測試和打開電源接通電源； 自動(dòng)/手動(dòng)鎖定:選擇自動(dòng)/手動(dòng)模式來執(zhí)行解鎖功率供應(yīng)切斷電源,反饋電壓測試,直流與交流供電斷電； 網(wǎng)絡(luò)連接:實(shí)現(xiàn)遠(yuǎn)程控制該系統(tǒng)的功能； 數(shù)據(jù)顯示:把收集的數(shù)據(jù)圖表保存并顯示； 自測:監(jiān)控操作的狀態(tài)系統(tǒng)。 系統(tǒng)應(yīng)該有專門的技術(shù)特點(diǎn)如下,以滿足在半物理仿真實(shí)驗(yàn)中的模擬要求和實(shí)現(xiàn)高度確信的根據(jù)以上特性和功能要求的系統(tǒng)。A、 系統(tǒng)的發(fā)展要求 根據(jù)半物理仿真實(shí)驗(yàn)測試步驟和性能評估的要求,數(shù)字電源系統(tǒng)特點(diǎn)如下： 一個(gè)通道的交流電(AC短路