摘要
通过对热轧动态设定型 AGC 控制系统模型进行理论分析,针对工程实际提出了一种基于μ综合的鲁棒控制方法．当系统中存在轧机刚度摄动时,热轧动态设定型 AGC 控制仍能实现期望的控制性能．通过引入表征系统性能的虚拟块,应用主环定理将动态设定型 AGC 系统在模型摄动下设计满足性能要求的控制器问题转换为广义系统的鲁棒稳定性问题,实现了系统鲁棒性能．它克服了使用 H_∞方法解决该问题的鲁棒性能缺点,其设计目标真实反映控制目标,方法更加有效．依据现场数据的仿真实验表明,基于μ综合的鲁棒控制方法比 H_∞方法具有更好的鲁棒性能．
A robust approach based on μ synthesis is proposed on the analysis of a dynamic set AGC model and engineering practice in hot strip mill. Even thought there is perturbation in stiffness, the performance of the system with the approach satisfies the request all the time. By introducing the fictive uncertainty characterizing the system capability and the main loop theorem, the problem that design a controller to satisfy the performance request with the model perturbation inside is transformed into the robust stability problem of an augmented system. Compared with H∞ method, this method is more effective because of its design target more really reflecting the control target. In the end, simulation with the practical data proves the dynamic set AGC system with the method can achieve more robust performance than that of H∞ method.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2006年第3期293-298,共6页
Journal of University of Science and Technology Beijing
