Temperature control system based on noise modulation for thin-film resistor heater

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作者：
Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China [1 ]
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来源：
Hongwai yu Jiguang Gongcheng Infrared Laser Eng. | 2006年 / 3卷 / 271-275期
关键词：
Correlation methods - Function evaluation - Pulse width modulation - Resistors - Temperature control - Thin films;
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摘要：
Control systems based-on PWM are widely used in industry and daily life, with control systems based-on RPWM being occured. A computing method was presented in this paper, in which the control signal was modulated by processed random noise resulting from environment and systems. A computing method of the average switching frequency and the average heating power via the autocorrelation function and the power spectrum density function of the noise was proposed. A simple heating and temperature control system based on noise modulation using analog circuit was designed. The experimental results show that the control system can operate stably and perform high precise temperature control in a certain scope of temperature.
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