A novel approach based on choquet fuzzy integral controller for line of sight stabilization application

Abstract

The performance of an electro-optical fire control system (EOFCS), mounted on a mobile platform, decreases exponentially with increase in the disturbance on the line of sight (LOS).To overcome this problem, LOS stabilization control based on gyro stabilized platform is required to isolate the LOS from the movement and vibration of carrier and ensure pointing, tracking and firing for target in EOFCS. Fuzzy-knowledge-based-controller (FKBC) design presents a good methodology to stabilize the line of sight against disturbances and nonlinearities present in the system, but tuning of input and output membership function parameters is quite a complex process. To overcome this, a choquet fuzzy integral based control algorithm is developed for this servo system with nonlinear property and some uncertainties. In this approach, q-measure is estimated to simplify the computation of λ-measure that aggregates the information from the weighted inputs. The output of fuzzy rules which are formulated by defining their consequent as the product of weighted input and a fuzzy measure is computed in the form of Choquet fuzzy integral. The performance of time response parameters and residual jitter on LOS obtained by choquet fuzzy control is presented here.