Multi-strategy composite control method for moisture of tobacco at outlet of tobacco redryer

The invention discloses a multi-strategy composite control method for moisture of tobacco at an outlet of a tobacco redryer. According to the method, a multi-strategy composite control server and a PLC (programmable logic controller) system are used, multiple control strategies are automatically coordinated and used, and moisture of the tobacco redryer is controlled within a given range; according to the method, control tasks are decomposed into three layers, the first layer is mainly responsible for solving the problems about prediction, decoupling and multivariable coordination; the second layer has a main function that compensation is performed by means of a feedback function and the response speed is properly increased when the control effect is reduced because of model mismatch of the first layer and the like; the third layer has a main function that a manipulated variable is adjusted to be close to a target value in a shortest time by a substantial adjustment means when the deviation between the manipul