Horizontality Calibration of Electro Optical Tracking Pedestal using DFT

Electro Optical Tracking System is a high precision trajectography system used for calibration of other trajectograpy sensors along with real time computation of trajectory. Apart from high resolution video analysis and measurement, it uses high performance calibration techniques to achieve the desired accuracy. In this paper we present an efficient methodology for implementation of horizontality calibration of Electro Optical Tracking System pedestal. This paper deals with the simulation of the pedestal mislevel calibration using tilt sensor data. A curve fitting method using least mean square algorithm and Discrete Fourier Transform are used and the results are compared. For both these mislevel and wobble error, a mathematical model is developed assuming the error to be sinusoid harmonics. In the present work, the fundamental harmonic is taken for the mislevel error and second harmonic is considered for wobble error. Simulated data with Gaussian noise are taken for calibration input. The output of both the error has been presented in this paper by considering different Gaussian noise and varied data sample rate