針對(duì)醫(yī)用充氣式保溫毯的溫度控制要求,提出其溫度控制閉環(huán)系統(tǒng)的結(jié)構(gòu),系統(tǒng)的硬件電路主要由溫度傳感器、單片機(jī)及RS232通訊模塊等組成。采用PWM方法控制晶閘管導(dǎo)通時(shí)間的方式來(lái)改變加熱絲的加熱時(shí)間、采用自適應(yīng)模糊PID控制方法實(shí)現(xiàn)保溫毯氣囊出氣溫度的自動(dòng)調(diào)節(jié)與控制。將整個(gè)控制過(guò)程分為兩個(gè)階段:自動(dòng)調(diào)節(jié)初始階段,加熱絲加熱的占空比為100%;當(dāng)溫度達(dá)到一定值后轉(zhuǎn)入自適應(yīng)模糊PID控制階段,由相應(yīng)控制量來(lái)決定加熱絲加熱的占空比,實(shí)現(xiàn)氣體溫度的調(diào)節(jié)。通過(guò)MATLAB仿真分析表明,所采用的自適應(yīng)模糊PID控制方法優(yōu)于常規(guī)的PID控制,具有良好的適應(yīng)性和魯棒性,可明顯提高系統(tǒng)的穩(wěn)態(tài)精度。
標(biāo)簽:
保溫毯
仿真
控制系統(tǒng)設(shè)計(jì)
上傳時(shí)間:
2013-10-13
上傳用戶:520
在綜合分析諧波勵(lì)磁無(wú)刷同步發(fā)電機(jī)勵(lì)磁控制系統(tǒng)的基礎(chǔ)上,對(duì)其勵(lì)磁控制策略進(jìn)行了研究,開(kāi)發(fā)了一套基于DSP( TMS320F2812) 控制的新型柴油發(fā)電機(jī)勵(lì)磁控制系統(tǒng),該系統(tǒng)采用參數(shù)自適應(yīng)模糊PID 控制勵(lì)磁,選用交流采樣方式實(shí)時(shí)檢測(cè)各信號(hào)的瞬時(shí)特性,系統(tǒng)仿真結(jié)果以及在1 臺(tái)25 kW 工頻柴油發(fā)電機(jī)上的試驗(yàn)結(jié)果證明了該控制器具有較好的電壓調(diào)節(jié)特性,系統(tǒng)穩(wěn)態(tài)和暫態(tài)性能完全滿足發(fā)電機(jī)對(duì)勵(lì)磁系統(tǒng)的要求。關(guān)鍵詞:勵(lì)磁調(diào)節(jié);模糊PID 控制;數(shù)字信號(hào)處理器;交流采樣
Abstract :According to the general analysis of the excitation cont rol system of the harmonious wave excitation brushless synchronous generator and it s characteristics ,a new type of diesel generator excitation cont rol system based on DSP( TMS320F2812) was designed. An adaptive fuzzy PID cont rol of excitation is used in this system. To detect the t ransient characteristics of the signals in a timely manner ,AC sampling was applied.The system simulation result s and the testing result s f rom a 25 kW diesel generator (50 Hz) can prove that the voltage regulation characteristics of the excitation cont rol system are very well ,and both the steadyOstate performance and the t ransient performance of the generator are also good.Key words :excitation cont rol ;fuzzy PID cont rol ;digital signal processor (DSP) ;AC sampling
標(biāo)簽:
DSP
柴油發(fā)電機(jī)
勵(lì)磁控制
系統(tǒng)研究
上傳時(shí)間:
2013-10-29
上傳用戶:fxf126@126.com