Based on a reduced - order model , the vsc of flexible rotor - magnetic bearing system is also investigated . a master - slave controller composed of a pc586 and a tms320c50 dsp board is build and a flexible rotor - magnetic bearing test rig is developed . simulation and experimental results show that the vsc is insensitive to the spillover problem due to the model truncation and parameter uncertainty 结果表明,变结构控制器对于因模态截断及非并置问题导致的未建模动态以及因系统自身特性变化而导致的参数摄动具有不敏感性,系统在上浮过程、受到外界扰动及复杂运转情况下的性能均优于pid控制器。
The system selects switching surface according to the approach of variable structure control . based on the control rules to design the variable structure controllers , the inner loop and the outer loop form a complete vsc control loop . the control system has switching surface and the system brings sliding along fixed desired trajectories 根据滑模变结构控制方法选择切换面,根据控制律,设计变结构控制器,使内环和外环合成为一个vsc控制器,系统的控制有切换,而且在切换面上系统将会沿着固定的轨迹产生滑动运动。
A comparative study and simulation of different control schemes , for the brushless motor variable - speed system , is presented . the simulation results show that , with the outer speed loop based on conventional proportional - integral controller , the dynamic performance of the system is not content , while with intelligence controller , the performance improves , and with variable - structure control with sliding mode , the system response influenced slightly by the vary of the system parameters 本文还对无换向器电动机双闭环调速系统的不同控制方式进行了仿真比较,结果表明:采用常规的pi转速调节器,系统的动态性能不是很好;采用简单的转速环智能控制器,系统的动态性能能得到一定改善;采用转速环滑模变结构控制器,系统的响应特性受系统参数变化的影响较小,具有优异的动态性能。
Because the network status is changeable in practice , in order to enhance the ability against disturbance and noise , a novel binary abr flow control algorithm is put forward using the sliding mode variable structure controller . the simulation results show that new algorithms avoid the self - oscillation induced by the nonlinear component in the standard efci algorithm 考虑到网络状态参数的时变性,为了使流量控制算法具有较强的抗干扰能力,应用滑模变结构控制器,设计了相应的二进制abr流量控制算法,适应了网络负载的动态变化,具有更好的鲁棒性。