Application of Ackermann Formula Based Discrete Grey Sliding Mode Control in Digital Missile Attitude Control System

The parameters of digital missile attitude-control system are time-varying and uncertain,thus we designed a discrete Variable Sliding Controller(VSC).The design combined the advantages of Ackermann's formula that the sliding function is simple and easily implemented,and advantage of the global VSC of the global robustness.Grey theory was introduced for designing a grey compensator to eliminate the bad influence of uncertainty.The result showed that the controller had satisfactory effect when using in simulation of digital missile attitude control system.