Abstract: In order to achieve the stable flight, a decoupling controller is necessary for a spinning fin stabilized projectile with low spin rate in flight with considering aerodynamic cross-linking, inertial cross-linking and control cross-linking. Since the model predictive control method has the advantages of good decoupling ability and less demand on modeling accuracy, but has the large on-line computing burden, thus an off-line model predictive control method with command filter is proposed. The off-line solved control parameter matrix and the on-line look-up table are used to reduce the on-line computing burden to meet the real-time control requirements. The state of command filter and the integral of tracking error are added into the prediction model to make full use of the dynamic characteristics so that the control parameter matrix can cope with the change of command signal. The effectiveness of the proposed algorithm is verified by the attitude control simulation. The designed controller can ensure the stability tracking of the flight command.Key

Key words: spinningfinstabilizedprojectile, decouplingcontrol, off-linepredictivecontrol, attitudecontrol, commandfilter