OFDMA Resource Allocation Simulations A Low Complexity Algorithm for proportional
標簽： proportional Simulations Allocation Complexity
上傳時間： 2014-08-11
上傳用戶：xuanjie
This is a device for use by RC hobbysts: it transforms a servo from proportional to integrative. For RC boats, it allows user not to change the functionality of the throttle stick, UP/DOWN in stead of proportional. The archive contains also the PCB files.
標簽： proportional integrative transforms hobbysts
上傳時間： 2014-01-25
上傳用戶：love1314
CANopen - Profile Fluid Power Technology proportional Valves and Hydrostatic Transmissions
標簽： Transmissions proportional Hydrostatic Technology
上傳時間： 2017-05-14
上傳用戶：AbuGe
I. C. Wong, Z. Shen, J. G. Andrews, and B. L. Evans, ``A Low Complexity Algorithm for proportional Resource Allocation in OFDMA Systems , Proc. IEEE Int. Work. Signal Processing Systems, 針對這篇文章給出的源代碼
上傳時間： 2014-01-24
上傳用戶：zhichenglu
Abstract: Quartz crystals are mechanical resonators with piezoelectric properties. The piezoelectricproperties (electric potential across the crystal is proportional to mechanical deformation) allow their use
標簽： 晶體振蕩器
上傳時間： 2013-10-17
上傳用戶：時代將軍
Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don’t bend them toomuch. In the case of a load cell, Hooke’s law states that thestrain in a material is proportional to the applied stress—as long as the stress is nowhere near the material’s yieldpoint (the “point of no return” where the material ispermanently deformed).
上傳時間： 2013-11-13
上傳用戶：墻角有棵樹
鎖定放大是微弱信號檢測的重要手段。基于相關(guān)檢測理論，利用開關(guān)電容的開關(guān)實現(xiàn)鎖定放大器中乘法器的功能，提出開關(guān)電容和積分器相結(jié)合以實現(xiàn)相關(guān)檢測的方法，并設(shè)計出一種鎖定放大器。該鎖定放大器將微弱信號轉(zhuǎn)化為與之相關(guān)的方波，通過后續(xù)電路得到正比于被測信號的直流電平，為后續(xù)采集處理提供方便。測量數(shù)據(jù)表明鎖定放大器前級可將10-6 A的電流轉(zhuǎn)換為10-1 V的電壓，后級通過帶通濾波器級聯(lián)可將信號放大1×105倍。該方法在降低噪聲的同時，可對微弱信號進行放大，線性度較高、穩(wěn)定性較好。 Abstract: Lock-in Amplifying（LIA）is one of important means for weak signal detection. Based on cross-correlation detection theory， switch in the swithched capacitor was used as multiplier of LIA， and a new method of correlation detection was proposed combining swithched capacitor with integrator. A kind of LIA was designed which can convert the weak signal to square-wave， then DC proportional to measured signal was obtained through follow-up conditioning circuit， providing convenience for signal acquisition and processing. The measured data shows that the electric current（10-6 A） can be changed into voltage（10-1 V） by LIA， and the signal is magnified 1×105 times by cascade band-pass filter. The noise is suppressed and the weak signal is amplified. It has the advantages of good linearity and stability.
標簽： 開關(guān)電容 鎖定放大器
上傳時間： 2013-11-29
上傳用戶：黑漆漆
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
標簽： signal Modulated analog create
上傳時間： 2015-05-14
上傳用戶：CHINA526
This software is developed to provide ease with controller design. For PID control, options are given to design and analyse the compensated and uncompensated system. You are free to choice among proportional PI, PD and PID mode of control. Both frequency and time domain characteristics can be observed. Special Menus are given to observe time and frequency response plots. For Statefeedback controller similar options are given. But this is limited to second order system only.
標簽： controller developed software control
上傳時間： 2017-07-25
上傳用戶：aysyzxzm
本應(yīng)用筆記介紹一種采用dsPIC數(shù)字信號控制器（Digital Signal Controller，DSC）或PIC24單片機來實現(xiàn)無刷直流（Brushless Direct Current，BLDC）電機無傳感器控制的算法。該算法利用對反電動勢（Back-Electromotive Force，BEMF）進行數(shù)字濾波的擇多函數(shù)來實現(xiàn)。通過對電機的每一相進行濾波來確定電機驅(qū)動電壓換相的時刻。這一控制技術(shù)省卻了分立的低通濾波硬件和片外比較器。需指出，這里論述的所有內(nèi)容及應(yīng)用軟件，都是假定使用三相電機。該電機控制算法包括四個主要部分：·利用DSC或單片機的模數(shù)轉(zhuǎn)換器（Analog-to-Digital Converter，ADC）來采樣梯形波BEMF信號·PWM導(dǎo)通側(cè)ADC采樣，以降低噪聲并解決低電感問題·將梯形波BEMF信號與VBUS/2進行比較，以檢測過零點·用擇多函數(shù)濾波器對比較結(jié)果信號進行濾波·以三種不同模式對電機驅(qū)動電壓進行換相：-傳統(tǒng)開環(huán)控制器·傳統(tǒng)閉環(huán)控制器比例-積分（proportional-Integral，Pl）閉環(huán)控制器
標簽： BLDC
上傳時間： 2022-07-01
上傳用戶：
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