Model Free Adaptive Attitude Control of Launch Vehicle Using Iterative Feedback Tuning

An improved model free adaptive control (MFAC) based the iterative feedback tuning (IFT), called IFT-MFAC, is applied to the launch vehicle in this paper. The designed controllers for the launch vehicle with three channels, including the pitch channel, yaw channel and roll channel, are determined based the full form dynamic linearization method by optimizing a given control criterion function. Then the determined controller in each channel is transformed into a parameterized form, and controller parameters are tuned by using the IFT method. During the parameter tuning, the Davidon-Fletcher-Powell (DFP) method is adopted to avoid the matrix inversion in the traditional IFT method. The simulation results demonstrate the effectiveness of IFT-MFAC for the attitude control of launch vehicle.