Life Extending Control by a Variance Constrained Mpc Approach

The objective of life extending control (LEC), also known as damage mitigating control, is to design a controller to achieve a good tradeoff between structural durability and dynamic performance in a system. In this paper, continuum fatigue damage theory for a boiler system is discussed. To reduce the accumulated damage, a variance constrained model predictive control (VCMPC) problem is developed and an algorithm via linear matrix inequalities (LMIs) is derived. Moreover, the controller obtained by this algorithm can assign the resultant closed-loop poles in a prescribed region. Finally, we apply the algorithm in a LEC design for a boiler system. Copyright c