A study relation between energy spectral density and probability density function with impulse response first order control system

Abstract

According to classical control theory my idea In basic first order system discuss impulse response and energy spectral density of first order system transfer function. If system under damped condition impulse response is an energy signal. Hence determine energy and energy spectral density of impulse response. After discussion Its impulse response and energy spectral density are a probability distribution function according some mathematical condition.