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Improved guaranteed cost control and quantum adaptive control are developed in this study for a quadrotor helicopter with state
delay and actuator faults. Improved guaranteed cost control is designed to eliminate disturbance effects and guarantee the robust stability of a
quadrotor helicopter with state delay. The inapplicability of guaranteed cost control to the quadrotor linear model is addressed by combining
guaranteed cost control with a model reference linear quadratic regulator. In the event of actuator faults, quadrotor tracking performance is
maintained through quantum adaptive control. Finally, the availability of the proposed scheme is verified through numerical simulation
標(biāo)簽：
Control
Helicopter
Guaranteed
Quadrotor
Adaptive
Strategy
Improved
Quantum
Delay
State
上傳時(shí)間：
2017-07-15
上傳用戶：bingzi_ml
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All wireless communication standards, existing and under development, adopt or
consider adopting orthogonal frequency-division multiplexing (OFDM) as the
modulation technique. It is clear that OFDM has become the definitive modulation
scheme in current and future wireless communication systems.
標(biāo)簽：
Baseband
Receiver
Design
OFDM
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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The radio spectrum is one of the most precious resources which must be managed
to ensure efficient access for the wireless communication services which use it. The
allocation and management of spectrum are administered by the regulatory
authorities. Traditionally, spectrum allocation is carried out exclusively of its use in
large geographic areas and assigning frequency bands to specific users or service
providers is proved to be inefficient. Recently, substantial knowledge about
dynamic spectrum access scheme has been accumulated to enable efficient spectrum
sharing.
標(biāo)簽：
Management
Spectrum
Access
and
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Wavelength division multiplexing (WDM) refers to a multiplexing and transmission
scheme in optical telecommunications fibers where different wavelengths, typically
emitted by several lasers, are modulated independently (i.e., they carry independent
information from the transmitters to the receivers). These wavelengths are then
multiplexed in the transmitter by means of passive WDM filters, and likewise they
are separated or demultiplexed in the receiver by means of the same filters or
coherent detection that usually involves a tunable local oscillator (laser).
標(biāo)簽：
Multiplexing
Wavelength
Division
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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The purpose of this book is to present detailed fundamental information on a
global positioning system (GPS) receiver. Although GPS receivers are popu-
larly used in every-day life, their operation principles cannot be easily found
in one book. Most other types of receivers process the input signals to obtain
the necessary information easily, such as in amplitude modulation (AM) and
frequency modulation (FM) radios. In a GPS receiver the signal is processed
to obtain the required information, which in turn is used to calculate the user
position. Therefore, at least two areas of discipline, receiver technology and
navigation scheme, are employed in a GPS receiver. This book covers both
areas.
標(biāo)簽：
Fundamentals_of_Global_Positionin
g_System_Receivers
上傳時(shí)間：
2020-06-09
上傳用戶：shancjb
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General Design Specification:1. AC Input Range 180-264Vac, Isolated ac-dc offline, 12LEDS,Output 700mA2. Intelligent wall dimmer detections(Leading-edge dimmer , Trailing-edgedimmer , No-dimmer)3. Multiple dimming control scheme4. Wide dimming range from 1% up to 100%5. No visible flicker6. Resonant control to achieve high efficiency7. High Power Factor, 0.9 without dimmer8. Temperature degrade control to adjust the LED9. Primary-only Sensing eliminates opto-isolator feedback and simplifies design
標(biāo)簽：
iw3617
上傳時(shí)間：
2021-12-03
上傳用戶：canderile
-
基于FPGA設(shè)計(jì)的相關(guān)論文資料大全 84篇用FPGA實(shí)現(xiàn)FFT的研究
劉朝暉 韓月秋
摘 要 目的 針對(duì)高速數(shù)字信號(hào)處理的要求，給出了用現(xiàn)場(chǎng)可編程門陣列(FPGA)實(shí)現(xiàn)的
快速傅里葉變換(FFT)方案.方法 算法為按時(shí)間抽取的基4算法，采用遞歸結(jié)構(gòu)的塊浮點(diǎn)運(yùn)
算方案，蝶算過(guò)程只擴(kuò)展兩個(gè)符號(hào)位以適應(yīng)雷達(dá)信號(hào)處理的特點(diǎn)，乘法器由陣列乘法器實(shí)
現(xiàn).結(jié)果 采用流水方式保證系統(tǒng)的速度，使取數(shù)據(jù)、計(jì)算旋轉(zhuǎn)因子、復(fù)乘、DFT等操作協(xié)
調(diào)一致，在計(jì)算、通信和存儲(chǔ)間取得平衡，避免了瓶頸的出現(xiàn).結(jié)論 實(shí)驗(yàn)表明，用FPGA
實(shí)現(xiàn)高速數(shù)字信號(hào)處理的算法是一個(gè)可行的方案.
關(guān)鍵詞 離散傅里葉變換； 快速傅里葉變換； 塊浮點(diǎn)運(yùn)算； 可編程門陣列
分類號(hào) TP39； TN957.511
Implementation of FFT with FPGA Technology
Liu Zhaohui Han Yueqiu
(Department of Electronics Engineering, Beijing Institute of Technology, Beijing 100081)
Abstract Aim To propose a scheme for implementing FFT with FPGA in accor-dance with the
requirement for high speed digital signal processing. Methods The structure of FPGA and
requirement of system were considered in the experiment, radix-4 algorithm of DIT and recursive
structure were adopted. The group float point arithmetic operation was used in the butterfly and the
array multiplier was used to realize multiplication. Results The pipeline pattern was used to ensure
the system speed, it made fetching data, calculating twiddle factor, complex multiplication and D
標(biāo)簽：
fpga
上傳時(shí)間：
2022-03-23
上傳用戶：
-
針對(duì)嵌入式產(chǎn)品程序更新問(wèn)題,提出了一種基于IAP技術(shù)的STM32單片機(jī)在線固件升級(jí)方案,設(shè)計(jì)了STM32單片機(jī)最小系統(tǒng)硬件電路和USB轉(zhuǎn)串口通信電路,并給出了Bootloader程序、APP程序、PC上機(jī)程序的實(shí)現(xiàn)流程.實(shí)驗(yàn)結(jié)果表明,該方案具有簡(jiǎn)單實(shí)用、穩(wěn)定性高、維護(hù)成本低和設(shè)備使用效率高的特點(diǎn),適用于嵌入式產(chǎn)品升級(jí).For the problem of updating embedded products program,an online firmware upgrade scheme of STM32 single chip microcomputer based on IAP technology is proposed.This scheme not only elaborates the principle of IAP technology in detail but also provides the design of the minimum system hardware circuit of STM32 MCU,the design of USB for serial communication circuit,and the implementation flow of Bootloader program,APP program and PC program.The experiment results show that the scheme is simple,practical and highly stable.In addition,it can be used to actual embedded product upgrading,significantly reducing maintenance costs and improving the efficiency of equipment.
標(biāo)簽：
iap
stm32
單片機(jī)
上傳時(shí)間：
2022-03-25
上傳用戶：
-
對(duì)某四輪獨(dú)立驅(qū)動(dòng)電動(dòng)汽車輪轂電機(jī)進(jìn)行研究,設(shè)計(jì)一種永磁無(wú)刷直流電機(jī)控制器.以STM32F103RBT6芯片為基礎(chǔ),對(duì)電機(jī)驅(qū)動(dòng)電路、采樣電路和保護(hù)電路分別進(jìn)行硬件設(shè)計(jì)與分析;同時(shí),采用模塊化軟件設(shè)計(jì)方案,對(duì)該控制器的軟件系統(tǒng)進(jìn)行升級(jí).實(shí)驗(yàn)驗(yàn)證表明:所設(shè)計(jì)的電機(jī)控制器能使電機(jī)響應(yīng)迅速、轉(zhuǎn)速穩(wěn)定、無(wú)超調(diào),且電動(dòng)車動(dòng)力輸出性能良好.A permanent magnet brushless direct current motor controller was designed by studying the hub motor of a four-wheel independent drive electric vehicle.Based on STM32 F103RBT6 chip,the hardware design and analysis of motor drive circuit,sampling circuit and protection circuit were carried out respectively.At the same time,modular software design scheme was adopted to upgrade the software system of the controller.Experimental results show that the designed motor controller can ensure the motor fast response,stable speed,no overshoot,and good power output performances.
標(biāo)簽：
電動(dòng)汽車
永磁無(wú)刷直流電機(jī)
上傳時(shí)間：
2022-03-26
上傳用戶：qingfengchizhu
-
通過(guò)采用無(wú)橋PFC和半橋LLC諧振變換器作為數(shù)字開(kāi)關(guān)電源的主變換拓?fù)?基于STM32系列微控制器的全數(shù)字控制PFC和DC-DC變換器,首先對(duì)數(shù)字化開(kāi)關(guān)電源方案進(jìn)行對(duì)比,然后闡述了200W數(shù)字開(kāi)關(guān)電源整體方案,并對(duì)數(shù)字開(kāi)關(guān)電源的無(wú)橋PFC和半橋LLC變換器進(jìn)行系統(tǒng)研究。By using a bridgeless PFC and a half-bridge LLC resonant converter as the main conversion topology of the digital switching power supply,the all-digital control PFC and DC-DC converter based on the STM32 series of microcontrollers,firstly the digital switching power supply scheme is compared,and then the overall scheme of 200 W digital switching power supply is expounded, and the bridgeless PFC and half-bridge LLC converter of digital switching power supply are systematically studied.
標(biāo)簽：
數(shù)字開(kāi)關(guān)電源
上傳時(shí)間：
2022-04-02
上傳用戶：qingfengchizhu
