摘要
提出了目标回路传递函数恢复的一种新的控制系统H∞/LTR设计方法,通过引入对控制量的加权,不仅可以保持LQR回路的特性,而且可以使控制器具有较低的增益和较小的带宽。此方法克服了LQG/LTR方法增益过高和LQR无穷带宽而引起的控制器对噪声特别敏感的缺点,从而达到抑制噪声的目的。与此同时,通过合理选择权函数,方法在回路中引入了积分环节,消除了静差,但却避免了增广,从而降低了系统的阶数。最后的实例验证了方法的可行性。
This paper proposes a new H_∞/LTR method for control system design. By introducing appropriate weighting on the control signals, this method not only can achieve the target loop transfer function, but also can get a controller with relatively low gain and limited bandwidth. As a result, this controller rejects measuring noise effectively. On the contrary, the controller designed by LQG/LTR method inherently has very high gain and large bandwidth, and suffers greatly from measuring noise. This H_∞/LTR method has another merit: by carefully including an integrator in the weighting function, zero steady state error requirement is met without system augmentation. Results from simulation evaluation of the proposed method attest to its feasibility.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2004年第2期104-107,共4页
Acta Aeronautica et Astronautica Sinica
基金
航空科学基金(00C52030)
博士点科研基金(2000028701)资助项目
