北京生物醫(yī)學(xué)工程

基于前饋解耦的嬰兒培養(yǎng)箱溫濕度控制系統(tǒng)

Temperature and humidity control system of infant incubator based on feedforward decoupling

作者：朱遠(yuǎn)帆楊海仕吳文陽王琪胡燕海

單位：寧波大學(xué)機(jī)械工程與力學(xué)學(xué)院（浙江寧波315211）寧波戴維醫(yī)療器械股份有限公司（浙江寧波 315712）

關(guān)鍵詞：嬰兒培養(yǎng)箱；階躍響應(yīng)法；前饋補(bǔ)償；解耦； PID控制

分類號：R318.04

出版年·卷·期（頁碼）：2019·38·3（246-250）

摘要：

目的針對嬰兒培養(yǎng)箱溫濕度控制系統(tǒng)存在的時(shí)滯、強(qiáng)耦合問題，本文在傳統(tǒng)PID控制技術(shù)的基礎(chǔ)上，提出了前饋補(bǔ)償控制方案。方法首先通過對恒溫恒濕控制系統(tǒng)的深入研究，采用階躍響應(yīng)法建立耦合系統(tǒng)模型來提高控制模型的準(zhǔn)確性和控制精度；然后在控制系統(tǒng)中加入前饋解耦控制器，使原本相互耦合的溫度、濕度變量等效為兩個(gè)獨(dú)立的溫濕度控制子系統(tǒng)；最后，在設(shè)定起始環(huán)境溫度為28℃、起始環(huán)境濕度為60.9%的前提下，分別應(yīng)用本文設(shè)計(jì)的帶有前饋解耦補(bǔ)償?shù)腜ID控制方案與傳統(tǒng)PID控制方案對溫濕度進(jìn)行MATLAB仿真實(shí)驗(yàn)。結(jié)果應(yīng)用前饋解耦的PID控制方案對溫濕度的調(diào)節(jié)時(shí)間分別為1878s、1210s，超調(diào)量幾乎為0，抗干擾峰值均有所降低，響應(yīng)結(jié)果遠(yuǎn)遠(yuǎn)優(yōu)于傳統(tǒng)PID控制。結(jié)論采用本文提出的方法，不僅可以排除溫濕度控制之間的耦合性，還可以加快溫濕度控制的響應(yīng)速度，增強(qiáng)系統(tǒng)的適用性。

Objective In order to solve the problem of time delay and strong coupling in the temperature and humidity control system of infant incubator, this paper proposes a feedforward compensation control scheme based on the traditional PID control technology. Methods Firstly, through the in-depth study of the constant temperature and humidity control system, the step response method is used to establish the coupling system model to improve the accuracy and control accuracy of the control model. Then the feed-forward decoupling controller is added into the control system to make the previously coupled temperature and humidity variables equivalent to two independent temperature and humidity control subsystems.Finally, under the premise of setting the initial ambient temperature to 28 ℃ and the initial ambient humidity to 60.9%, the PID control scheme with feedforward decoupling compensation designed in this paper and the traditional PID control scheme are applied to the temperature and humidity on the MATLAB simulation results. Results The feedforward decoupling PID control scheme is applied to adjust the temperature and humidity for 1878s and 1210s respectively, the overdose is almost zero, the anti-interference peak value is reduced, and the response result is far better than the traditional PID control. Conclusions The method proposed in this paper can not only eliminate the coupling between temperature and humidity control, but also accelerate the response speed of temperature and humidity control and enhance the applicability of the system.

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