摘要
为了缩短控制系统的调节和整理时间,提出了变饱和状态柔性变结构控制系统设计方法。该方法在系统存在较大偏差时只通过线性控制器调节,在中等偏差时通过线性控制器和变饱和状态控制器一起调节,在小偏差时由线性控制器和由变饱和状态控制器转变的线性控制器一起调节,从而提高了对控制约束的利用。仿真结果表明:该方法在调节和整理时间以及跟踪精度上均优于滑模控制,而且控制信号平滑。
For the purpose of achieving high regulation rates and short settling times, the design of soft variable structure control with variable saturation was proposed. For the large state vectors, a linear control is employed to regulate. For the moderate state vectors, the nonlinear component is blended into the control signal. For very small excursions of the state vectors, the nonlinear component becomes linear component, and regulation is accomplished employing two linear controls. So the control parameter available within the constraints may be efficiently utilized. Simulation results verify that the proposed soft variable structure control with variable saturation is better than sliding mode control in regulation rates, settling times and tracking performance. Furthermore the control signals are smooth.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2008年第14期3790-3794,共5页
Journal of System Simulation
关键词
柔性变结构控制
变饱和状态
仿真
滑模控制
soft variable structure control
variable saturation
simulation
sliding mode control
