Voice Controlled Robotic System By Using FFT

Abstract

For more than a century humans have been using machine to perform their task with ease. Robots or the robotic systems are the next step of evolution of machines, which can be used to dignify human life to next extent. In this paper, we develop a robotic system which take voice commands from user in real time & can perform accordingly. Each word vibrates at different frequencies. So, we perform digital signal processing tool such as FFT (Fast Fourier Transform) on a input command to convert the signal from time domain into frequency domain. Then we extracted the features of input commands from its frequency domain to classify the input commands into a given set of commands by using PNN (probability neural Network) classifier. Once the input command is identified, we communicated with the robotic system serially by using GSM module which is controlled by using Arduino.