Based on singular frequencies,this paper provides a simple approach to determine the complete set of stabilizi...
OU Linlin 1,CHEN Xuanguang 1,2,FENG Yuanjing 1,YU Li 1 1.Department of Automation,Zhejiang University of Technology,Hangzhou 310032,P.R.China2.Zhejiang Feiying Sewing Equipment CO.,LTD,Zhuji 311832,P.R.China
This paper proposes a decoupling control scheme with two-degrees-of-freedom (2DOF) control structure. In the proposed scheme, two multivariable controllers are designed based on Internal Model Control (IMC) theory for setpoint tracking and disturbance rejection independently. An analytical approximation method is utilized to reduce the order of the controllers. By adjusting the corresponding controller parameter, the setpoint tracking and disturbance rejection of each control loop can be tuned independently. In the presence of multiplicative input uncertainty, a calculation method is also proposed to derive the low bounds of the control parameters in order to guarantee the robust stability of the system. Simulations are illustrated to demonstrate the validity of the proposed control scheme.
