為了提高直接轉矩控制（DTC）系統定子磁鏈估計精度，降低電流、電壓測量的隨機誤差，提出了一種基于擴展卡爾曼濾波（EKF）實現異步電機轉子位置和速度估計的方法。擴展卡爾曼濾波器是建立在基于旋轉坐標系下由定子電流、電壓、轉子轉速和其它電機參量所構成的電機模型上，將定子電流、定子磁鏈、轉速和轉子角位置作為狀態變量，定子電壓為輸入變量，定子電流為輸出變量，通過對磁鏈和轉速的閉環控制提高定子磁鏈的估計精度，實現了異步電機的無速度傳感器直接轉矩控制策略，仿真結果驗證了該方法的可行性,提高了直接轉矩的控制性能。 Abstract: In order to improve the Direct Torque Control（DTC） system of stator flux estimation accuracy and reduce the current， voltage measurement of random error， a novel method to estimate the speed and rotor position of asynchronous motor based on extended Kalman filter was introduced. EKF was based on d-p axis motor and other motor parameters （state vector: stator current， stator flux linkage， rotor angular speed and position； input: stator voltage； output: staror current). EKF was designed for stator flux and rotor speed estimation in close-loop control. It can improve the estimated accuracy of stator flux. It is possible to estimate the speed and rotor position and implement asynchronous motor drives without position and speed sensors. The simulation results show it is efficient and improves the control performance.
上傳時間： 2015-01-02
上傳用戶：qingdou
在Multisim 10軟件環境下，設計一種由運算放大器構成的精確可控矩形波信號發生器，結合系統電路原理圖重點闡述了各參數指標的實現與測試方法。通過改變RC電路的電容充、放電路徑和時間常數實現了占空比和頻率的調節，通過多路開關投入不同數值的電容實現了頻段的調節，通過電壓取樣和同相放大電路實現了輸出電壓幅值的調節并提高了電路的帶負載能力，可作為頻率和幅值可調的方波信號發生器。Multisim 10仿真分析及應用電路測試結果表明，電路性能指標達到了設計要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上傳時間： 2014-01-21
上傳用戶：shen007yue
12864液晶時鐘顯示程序 LCD 地址變量 ;**************變量的定義***************** RS BIT P2.0 ;LCD數據/命令選擇端(H/L) RW BIT P2.1 ;LCD讀/寫選擇端(H/L) EP BIT P2.2 ;LCD使能控制 PSB EQU P2.3 RST EQU P2.5 PRE BIT P1.4 ;調整鍵(K1) ADJ BIT P1.5 ;調整鍵(K2) COMDAT EQU P0 LED EQU P0.3 YEAR DATA 18H ;年,月,日變量 MONTH DATA 19H DATE DATA 1AH WEEK DATA 1BH HOUR DATA 1CH ;時,分,秒,百分之一秒變量 MIN DATA 1DH SEC DATA 1EH SEC100 DATA 1FH STATE DATA 23H LEAP BIT STATE.1 ;是否閏年標志1--閏年，0--平年 KEY_S DATA 24H ;當前掃描鍵值 KEY_V DATA 25H ;上次掃描鍵值 DIS_BUF_U0 DATA 26H ;LCD第一排顯示緩沖區 DIS_BUF_U1 DATA 27H DIS_BUF_U2 DATA 28H DIS_BUF_U3 DATA 29H DIS_BUF_U4 DATA 2AH DIS_BUF_U5 DATA 2BH DIS_BUF_U6 DATA 2CH DIS_BUF_U7 DATA 2DH DIS_BUF_U8 DATA 2EH DIS_BUF_U9 DATA 2FH DIS_BUF_U10 DATA 30H DIS_BUF_U11 DATA 31H DIS_BUF_U12 DATA 32H DIS_BUF_U13 DATA 33H DIS_BUF_U14 DATA 34H DIS_BUF_U15 DATA 35H DIS_BUF_L0 DATA 36H ;LCD第三排顯示緩沖區 DIS_BUF_L1 DATA 37H DIS_BUF_L2 DATA 38H DIS_BUF_L3 DATA 39H DIS_BUF_L4 DATA 3AH DIS_BUF_L5 DATA 3BH DIS_BUF_L6 DATA 3CH DIS_BUF_L7 DATA 3DH DIS_BUF_L8 DATA 3EH DIS_BUF_L9 DATA 3FH DIS_BUF_L10 DATA 40H DIS_BUF_L11 DATA 41H DIS_BUF_L12 DATA 42H DIS_BUF_L13 DATA 43H DIS_BUF_L14 DATA 44H DIS_BUF_L15 DATA 45H FLAG DATA 46H ;1-年，2-月，3-日，4-時，5-分，6-秒，7-退出調整。 DIS_H DATA 47H DIS_M DATA 48H DIS_S DATA 49H
上傳時間： 2013-12-25
上傳用戶：wvbxj
Full support for extended regular expressions (those with intersection and complement); Support for some kinds of cycles in grammar; DFA-based operation; Unicode support; C++ only, requires a modern compiler; Lexical analyzers can be configured to get symbols from any input class (built-in support for std::istream, std::wistream and FILE *); Designed to work with Whale, but can work standalone or interface to other parsers.
標簽： intersection expressions complement for
上傳時間： 2013-12-11
上傳用戶：zhanditian
RemoteWAP is a Remote Administration Tool for any Operating System that can support the Java Virtual Machine. It has been designed for anyone who wishes to have complete control of there OS anywhere by using a WAP enabled Mobile Phone. RemoteWAP is developed using Java and WML for the client mobile phone front-end pages. RemoteWAP has a Java Swing-GUI to allow for easy control. Future releases will have a Command Line Interface for quick use
標簽： Administration RemoteWAP Operating Virtual
上傳時間： 2015-02-01
上傳用戶：exxxds
介紹幾種cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducing the advanced register based CPU architecture i.e., the MCS 251 microcontroller architecture. The register based CPU supports a 40-byte register file. In addition, the 8xC251SA/SB/SP/SQ microcontroller has 256-Kbyte expanded external code/data memory space and 64-Kbyte stack space. The new controller is also specially designed to execute C code efficiently. More importantly, the 8xC251SA/SB/SP/SQ maintains binary code compatibility with MCS 51 microcontrollers but at the same time allows the use of the powerful MCS 251 microcontroller instruction set, with many new 8, 16 and 32 bit instructions available. The 8xC251SA/SB/SP/SQ has 512 bytes or 1 Kbyte of on-chip data RAM options and is available in 16 Kbytes and 8 Kbytes of on-chip ROM/OTPROM or ROMless options.
標簽： architecture introducin peripheral improves
上傳時間： 2015-03-15
上傳用戶：ccclll
Locally weighted polynomial regression LWPR is a popular instance based al gorithm for learning continuous non linear mappings For more than two or three in puts and for more than a few thousand dat apoints the computational expense of pre dictions is daunting We discuss drawbacks with previous approaches to dealing with this problem
標簽： polynomial regression weighted instance
上傳時間： 2013-11-28
上傳用戶：sunjet
為Delphi2005做了改動 DSPack 2.3.3 (Sep 2004). DSPack is a set of Components and class to write Multimedia Applications using MS Direct Show and DirectX technologies. DSPack is designed to work with DirectX 9 on Win9X, ME, 2000, and Windows XP operating systems. Now VMR (Video Mixing Renderer) is available on all Windows Operating Systems. DSPack 2 is designed to work with Delphi 5,6,7 and CPP Builder 6.
標簽： DSPack Components Multimedia Delphi
上傳時間： 2014-01-22
上傳用戶：hzy5825468
Description: C4.5Rule-PANE is a rule learning method which could generate accurate and comprehensible symbolic rules, through regarding a neural network ensemble as a pre-process of a rule inducer. Reference: Z.-H. Zhou and Y. Jiang. Medical diagnosis with C4.5 rule preceded by artificial neural network ensemble. IEEE Transactions on Information Technology in Biomedicine, 2003, vol.7, no.1, pp.37-42. 使用神經網絡集成方法診斷糖尿病,肝炎,乳腺癌癥的案例研究.
標簽： comprehensibl Description Rule-PANE accurate
上傳時間： 2013-11-30
上傳用戶：wcl168881111111
Simple C Compiler, Release 0.1.6 Simple C is a portable C compiler based on Small C/386. It is designed to run on Linux, but it should be usable on any Unix-like operating system for the x86 with minimal effort.
標簽： Simple Compiler compiler portable
上傳時間： 2015-04-12
上傳用戶：pompey
