【摘要】：在航天電源中，自由活塞斯特林發(fā)動機(jī)(Free Piston Stirling Engine，F(xiàn)PSE)因其燃料來源廣，噪音低，污染少，效率高等優(yōu)點(diǎn)，越來越受到人們的關(guān)注。FPSE發(fā)電系統(tǒng)由FPSE和單相永磁直線振蕩電機(jī)兩部分組成，此系統(tǒng)省去了曲軸連桿機(jī)構(gòu)，具有效率高，運(yùn)轉(zhuǎn)特性好，結(jié)構(gòu)簡單等優(yōu)點(diǎn)。因此，本文所研究的應(yīng)用于此系統(tǒng)的控制器具有重要的現(xiàn)實(shí)意義。本論文從以下幾個(gè)方面對FPSE發(fā)電機(jī)控制系統(tǒng)進(jìn)行詳細(xì)研究： 首先，對FPSE發(fā)電系統(tǒng)的工作原理進(jìn)行分析，分別建立FPSE的動力學(xué)模型和單相永磁直線振蕩電機(jī)的數(shù)學(xué)模型，并根據(jù)其數(shù)學(xué)模型在Matlab/Simulink軟件中建立其仿真模型，根據(jù)FPSE和永磁直線電機(jī)參數(shù)對其仿真模型進(jìn)行驗(yàn)證，為控制系統(tǒng)的研究提供理論依據(jù)。 其次，對FPSE發(fā)電機(jī)不同工作階段的控制策略進(jìn)行研究。在FPSE發(fā)電機(jī)的起動階段和發(fā)電階段都采用行程、電流控制，并研究了基于反電勢自傳感位置檢測的基本原理及改進(jìn)方法，在Matlab/Simulink軟件中建立FPSE發(fā)電機(jī)控制系統(tǒng)的仿真模型，對整體系統(tǒng)進(jìn)行仿真驗(yàn)證，仿真結(jié)果驗(yàn)證了控制策略和位置估算算法的可行性。 再次，對FPSE發(fā)電機(jī)控制系統(tǒng)硬件和軟件進(jìn)行設(shè)計(jì)。其中主控制器采用TI公司的DSP TMS320F2812，位置檢測采用自傳感技術(shù)，即根據(jù)電機(jī)自身的電磁關(guān)系估算出動子位置，此方法具有可靠性高、成本低及易于維修等優(yōu)點(diǎn)。 最后，搭建實(shí)驗(yàn)平臺，對系統(tǒng)進(jìn)行實(shí)驗(yàn)。用三相直線電機(jī)代替FPSE作為原動機(jī)，分別驗(yàn)證了電動階段和發(fā)電階段控制策略的可行性。給出了實(shí)驗(yàn)測試數(shù)據(jù)及波形并對其進(jìn)行分析及處理，實(shí)驗(yàn)表明本文研究的控制器能夠基本達(dá)到預(yù)期要求。
[Abstract]:In the space power supply, (Free Piston Stirling Engine,FPSE (Free Piston Stirling engine) has the advantages of wide fuel source, low noise, low pollution, high efficiency and so on. The FPSE power generation system is composed of FPSE and single-phase permanent magnet linear oscillation motor. This system saves the crankshaft linkage mechanism and has the advantages of high efficiency, good operation characteristics and simple structure. Therefore, the controller studied in this paper has important practical significance. In this paper, the FPSE generator control system is studied in detail from the following aspects: firstly, the working principle of FPSE generator system is analyzed, and the dynamic model of FPSE and the mathematical model of single-phase permanent magnet linear oscillation motor are established, respectively. According to its mathematical model, the simulation model is established in Matlab/Simulink software, and the simulation model is verified according to the parameters of FPSE and permanent magnet linear motor, which provides a theoretical basis for the research of control system. Secondly, the control strategy of FPSE generator at different working stages is studied. The stroke and current control are adopted in the starting and generating stages of FPSE generator. The basic principle and improved method of self-sensing position detection based on reverse EMF are studied, and the simulation model of FPSE generator control system is established in Matlab/Simulink software. The simulation results of the whole system verify the feasibility of the control strategy and the position estimation algorithm. Thirdly, the hardware and software of FPSE generator control system are designed. The main controller uses the self-sensing technology of DSP TMS320F2812, position detection of TI company, that is, estimating the position of the actuator according to the electromagnetic relation of the motor itself. This method has the advantages of high reliability, low cost and easy maintenance. Finally, the experiment platform is built and the system is tested. Three phase linear motor is used instead of FPSE as prime mover to verify the feasibility of control strategy in electric stage and generation stage respectively. The experimental data and waveform are given and analyzed and processed. The experimental results show that the controller studied in this paper can basically meet the expected requirements.
【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】：2014
【分類號】：V442;TM31

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本文編號：2315382