本文選題：憶阻器　切入點：電路模型　出處：《杭州電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：憶阻器是繼電阻、電感和電容之后的第四種基本電路元件，其概念于1971年提出，但直到2008年HP實驗室才發(fā)現(xiàn)TiO2在納米尺度下具有記憶電阻的特性。憶阻器是一種無源的非線性電路元件，其阻值會隨著通過其自身電流量的改變而改變，且電流中斷時其阻值會保持掉電瞬間的狀態(tài)。憶阻器在非遺失性存儲器、人工神經(jīng)網(wǎng)絡(luò)和非線性電路方面有著廣闊的潛在應(yīng)用前景，但迄今尚未商用化。本文研究憶阻器的硬件電路模型，以期用其替代實際憶阻器進行實驗和應(yīng)用電路研究；探索憶阻器構(gòu)成的新型混沌電路及其特性，并嘗試將其應(yīng)用于Android平臺手機之間文件的保密傳輸之中。本文主要包括以下內(nèi)容： (1)對憶阻器建模進行了研究，在HP實驗室提出的TiO2憶阻器理論模型基礎(chǔ)之上，利用模擬電路設(shè)計了一個等效的荷控型憶阻器電路模型和一個磁控型憶阻器電路模型，對電路模型在正弦激勵下的伏安特性進行了理論分析、multisim仿真實驗和實際電路實驗。理論分析和實驗結(jié)果表明，憶阻器電路模型的伏安特性與HP TiO2憶阻器完全符合。為模擬實際憶阻器的掉電記憶特性，本文又提出了一個基于MCU和數(shù)字電位器實現(xiàn)的離散型荷控憶阻器架構(gòu)模型，該模型除具有TiO2憶阻器的伏安特性外，重要的是還具有實際憶阻器的記憶特性。對其在正弦波、三角波、方波和鋸齒波激勵下的伏安特性進行了電路實驗驗證，獲得了預(yù)期的結(jié)果。 (2)對混沌基本理論進行了研究，在Chua混沌系統(tǒng)基礎(chǔ)上，利用一個磁控型憶阻器替換Chua混沌電路中的Chua二極管，構(gòu)建了一個基于磁控憶阻器的四維混沌系統(tǒng)。對其平衡點、系統(tǒng)穩(wěn)定性進行理論分析求證，通過分岔圖和Lyapunov譜，發(fā)現(xiàn)該系統(tǒng)存在周期一、周期二、周期四及混沌的幾種狀態(tài)，并求出對應(yīng)狀態(tài)下的系統(tǒng)參數(shù)，利用DSP驗證了在該組參數(shù)下的系統(tǒng)特性。最后對該混沌系統(tǒng)進行離散、量化處理，提出一種性能符合NIST測試標(biāo)準(zhǔn)的偽隨機序列生成方法。 (3)針對密碼學(xué)和混沌學(xué)的諸多相似性，本文利用該憶阻器混沌系統(tǒng)產(chǎn)生的隨機序列作為密鑰，，對Android平臺基于WiFi的無線數(shù)據(jù)進行加密共享。該軟件有兩種工作模式， WiFi模式下兩臺Android設(shè)備通過WiFi熱點轉(zhuǎn)發(fā)進行數(shù)據(jù)通訊；WiFi直連模式下兩臺Android設(shè)備通過點對點直連方式進行數(shù)據(jù)通訊。在Eclipse軟件環(huán)境中利用Java語言實現(xiàn)該軟件的編寫，最后基于Tiny6410實驗平臺及Android手機進行實際測試。
[Abstract]:Resistive devices are 4th basic circuit components after resistors, inductors and capacitors. The concept was proposed in 1971. But it wasn't until 2008 that HP Labs discovered that TiO2 has a memory resistance on a nanoscale scale. The resistor is a passive, nonlinear circuit element whose resistance changes with its own current. And when the current is interrupted, the resistance value will remain in the state of instant power-off. The resistor has a wide potential application in non-lost memory, artificial neural networks and nonlinear circuits. But it has not been commercialized up to now. This paper studies the hardware circuit model of the resistor in order to study the experiment and application circuit instead of the actual one, and explores the new chaotic circuit and its characteristics. And try to apply it to the secure transmission of files between mobile phones on Android platform. This paper mainly includes the following contents:. 1) based on the theoretical model of TiO2, an equivalent circuit model of load-controlled resistor and a magnetic-controlled circuit are designed based on the theoretical model of TiO2, which is proposed by HP lab. The volt-ampere characteristics of the circuit model under sinusoidal excitation are analyzed theoretically and experimentally by multisim simulation experiment and practical circuit experiment. The theoretical analysis and experimental results show that, The volt-ampere characteristic of the circuit model of the resistor is in good agreement with that of the HP TiO2 resistor. In order to simulate the memory characteristics of the practical demertiplexer, this paper presents a discrete dead-controlled resistor architecture model based on MCU and digital potentiometer. In addition to the volt-ampere characteristics of the TiO2 resistor, it is important that the model also has the memory characteristics of the actual resistor. The volt-ampere characteristics of the model under the excitation of sinusoidal wave, triangular wave, square wave and sawtooth wave are verified by circuit experiments. The expected results were obtained. In this paper, the basic theory of chaos is studied. On the basis of Chua chaotic system, a four-dimensional chaotic system is constructed by replacing the Chua diode in the Chua chaotic circuit with a magnetic-controlled resistor, and the equilibrium point of the system is analyzed. The stability of the system is proved by theoretical analysis. By means of bifurcation diagram and Lyapunov spectrum, it is found that the system has several states of period one, period two, period four and chaos, and the corresponding parameters of the system are obtained. Finally, the chaotic system is discretized and quantized, and a pseudorandom sequence generation method, which meets the NIST test standard, is proposed. In view of the similarity between cryptography and chaos, this paper uses the random sequence generated by the chaotic system of the mnemonics as the key. The Android platform wireless data based on WiFi is encrypted and shared. The software has two working modes. In WiFi mode, two Android devices transmit data via WiFi hot spot. In WiFi direct connection mode, two Android devices are connected through point-to-point direct connection. In the Eclipse software environment, the Java language is used to realize the programming of the software. Finally, based on the Tiny6410 experimental platform and Android mobile phone for practical testing.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM132;O415.5

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