【摘要】：開關(guān)電源具有效率高、重量輕、體積小等特點,廣泛應(yīng)用于各類電子系統(tǒng)中。隨著電子系統(tǒng)向高可靠、長壽命的方向發(fā)展,用戶對開關(guān)電源的質(zhì)量與可靠性也出更高的要求。在實際使用中,開關(guān)電源不可避免將受到環(huán)境(如溫度)和自身產(chǎn)品波動(制造噪聲)的影響,導(dǎo)致其出現(xiàn)質(zhì)量不穩(wěn)定的現(xiàn)象。如能在開關(guān)電源設(shè)計過程中考慮溫度、制造噪聲等不確定因素的影響,將有效提升開關(guān)電源的穩(wěn)健性和可靠性。本文以某典型開關(guān)電源為研究對象,對考慮溫度影響的參數(shù)穩(wěn)健設(shè)計方法進行研究,主要內(nèi)容如下:首先,針對某典型開關(guān)電源電路,在Saber中搭建不考慮溫度的電路仿真模型,并進行實測驗證;同時研究電源主要元器件的溫度特性,建立器件溫度模型;進而構(gòu)建考慮溫度影響的開關(guān)電源仿真模型,并初步分析不同溫度下的開關(guān)電源輸出的波動情況。其次,在傳統(tǒng)的田口參數(shù)設(shè)計方法基礎(chǔ)上,提出一種綜合考慮制造和溫度噪聲的參數(shù)設(shè)計方法。仍以典型開關(guān)電源電路為研究對象,通過靈敏度分析篩選得到電路的關(guān)鍵器件參數(shù);之后考慮電路中的制造和溫度噪聲,構(gòu)建二維噪聲內(nèi)外表設(shè)計方案,仿真獲得數(shù)據(jù),統(tǒng)計、分析得到優(yōu)化設(shè)計方案,并采用蒙特卡洛模擬驗證優(yōu)化方案。然后,研究考慮溫度影響的多目標穩(wěn)健參數(shù)優(yōu)化方法。通過試驗設(shè)計構(gòu)建樣本空間,采用輸出合格率評估不同溫度下的樣本空間輸出,篩選溫度區(qū)間內(nèi)的關(guān)鍵溫度點;建立開關(guān)電源電路輸入變量和輸出響應(yīng)之間的近似模型,為全局尋優(yōu)快速計算奠定基礎(chǔ);然后建立開關(guān)電源多目標穩(wěn)健優(yōu)化模型,采用遺傳算法進行全局尋優(yōu),并利用蒙特卡洛模擬比較優(yōu)化前后各目標在全溫度區(qū)間內(nèi)的分布效果。最后,基于Saber與QT開發(fā)電子系統(tǒng)穩(wěn)健性參數(shù)設(shè)計軟件平臺,將本文研究方法進行軟件實現(xiàn)。平臺將解決Saber參數(shù)傳遞接口問題,并集成建模、分析和設(shè)計功能,成為電子系統(tǒng)穩(wěn)健參數(shù)設(shè)計的通用平臺。某噪聲放大電路的應(yīng)用結(jié)果則進一步證明了該軟件平臺的通用性和有效性。
[Abstract]:Switching power supply is widely used in all kinds of electronic systems because of its high efficiency, light weight and small volume. With the development of electronic system in the direction of high reliability and long life, the quality and reliability of switching power supply are demanded by users. In practical use, the switching power supply will inevitably be affected by the environment (such as temperature) and the fluctuation of its own products (making noise), resulting in the phenomenon of unstable quality. If the influence of temperature, noise and other uncertain factors can be taken into account in the design of switching power supply, the robustness and reliability of switching power supply will be improved effectively. In this paper, a typical switching power supply is taken as the research object to study the parameter robust design method considering the influence of temperature. The main contents are as follows: firstly, a simulation model without temperature is built in Saber for a typical switching power supply circuit. And carry on the actual test verification; At the same time, the temperature characteristics of the main components of the power supply are studied, the device temperature model is established, and the simulation model of the switching power supply considering the influence of temperature is constructed, and the fluctuation of the output of the switching power supply at different temperature is analyzed preliminarily. Secondly, based on the traditional design method of Taguchi parameters, a parameter design method is proposed which considers manufacturing and temperature noise synthetically. Taking the typical switching power supply circuit as the research object, the key device parameters of the circuit are obtained by sensitivity analysis. Then, considering the manufacturing and temperature noise in the circuit, the design scheme of two-dimensional noise interior appearance is constructed, the data of simulation, statistics and analysis are obtained, and the optimization scheme is verified by Monte Carlo simulation. Then, the multi-objective robust parameter optimization method considering the influence of temperature is studied. The sample space is constructed by experimental design and the output qualified rate is used to evaluate the sample space output at different temperatures and to screen the key temperature points in the temperature range. The approximate model between input variable and output response of switching power supply circuit is established, which lays the foundation for fast calculation of global optimization. Then the multi-objective robust optimization model of switching power supply is established and the global optimization is carried out by genetic algorithm. The distribution effect of each target in the whole temperature range before and after optimization is compared by Monte Carlo simulation. Finally, the software platform of robust parameter design of electronic system is developed based on Saber and QT. The platform will solve the problem of Saber parameter transfer interface, and integrate modeling, analysis and design functions, and become a general platform for robust parameter design of electronic system. The application results of a noise amplifier further prove the generality and effectiveness of the software platform.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN86

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本文編號：2420787