Low-Pass NGD Numerical Function and STM32 MCU Emulation Test
IEEE transactions on industrial electronics(2022)
摘要
This article introduces an original microcontroller unit (MCU) design of numerical low-pass (LP) negative group delay (NGD) function. The innovative theory of the numerical LP-NGD function is developed based on the first-order analog transfer function discretization. The infinite impulse response (IIR) LP-NGD is fundamentally formulated in function of the desired NGD value, cutoff frequency, gain, and the MCU sampling frequency. A STM32 MCU proof-of-concept (POC) is tested to implement the IIR LP-NGD function. Different real-time tests with visualization of input and output analog signals from the MCU LP-NGD POC were performed. As expected, time-advance demonstration tests with milli-second short- and several hour long-duration time-scale with arbitrary waveform signals from temperature and humidity sensors. The signal time-advance is not in contradiction with the causality. The proposed digital MCU function opens a potential future industrial application of LP-NGD function via sensored signal anticipation.
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关键词
Delays,Delay effects,Cutoff frequency,Time-domain analysis,Quality of service,Microcontrollers,Bandwidth,Circuit design,emulation,microcontroller unit (MCU),negative group delay (NGD),numerical circuit,time-domain demonstration
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