系统工程理论与实践
繫統工程理論與實踐
계통공정이론여실천
Systems Engineering—Theory & Practice
2011年
7期
1341~1355
,共null页
张永立 李洪兴 苗志宏 程会锋
張永立 李洪興 苗誌宏 程會鋒
장영립 리홍흥 묘지굉 정회봉
倒立摆 能量控制 变增益LQR控制器(VGLQR) 等效小车
倒立襬 能量控製 變增益LQR控製器(VGLQR) 等效小車
도립파 능량공제 변증익LQR공제기(VGLQR) 등효소차
inverted pendulum; energy control; variable gain LQR controller (VGLQR); equivalent cart
为了实现导轨受限情况下二级倒立摆非线性系统的自动摆起控制,提出了基于变增益LQR控制方法的自动摆起控制方案.首先,基于Lyapunov函数,设计了变参数切换控制器,通过限制小车运动的最大速度,将小车位移控制在一定的范围内,并将第一级摆杆从下垂位置摆起到倒立位置;其次,采用变增益LQR控制方法将第一级摆杆稳定在倒立位置,同时,采用等效小车法将第二级摆杆摆起到倒立位置;最后,采用变增益LQR控制方法将两摆杆同时稳定在倒立平衡点.变增益LQR控制器的鲁棒性较强,避免了由于摆杆状态变化而引起小车位移的冲击.仿真和实物实验均验证了该控制方案的有效性.
為瞭實現導軌受限情況下二級倒立襬非線性繫統的自動襬起控製,提齣瞭基于變增益LQR控製方法的自動襬起控製方案.首先,基于Lyapunov函數,設計瞭變參數切換控製器,通過限製小車運動的最大速度,將小車位移控製在一定的範圍內,併將第一級襬桿從下垂位置襬起到倒立位置;其次,採用變增益LQR控製方法將第一級襬桿穩定在倒立位置,同時,採用等效小車法將第二級襬桿襬起到倒立位置;最後,採用變增益LQR控製方法將兩襬桿同時穩定在倒立平衡點.變增益LQR控製器的魯棒性較彊,避免瞭由于襬桿狀態變化而引起小車位移的遲擊.倣真和實物實驗均驗證瞭該控製方案的有效性.
위료실현도궤수한정황하이급도립파비선성계통적자동파기공제,제출료기우변증익LQR공제방법적자동파기공제방안.수선,기우Lyapunov함수,설계료변삼수절환공제기,통과한제소차운동적최대속도,장소차위이공제재일정적범위내,병장제일급파간종하수위치파기도도립위치;기차,채용변증익LQR공제방법장제일급파간은정재도립위치,동시,채용등효소차법장제이급파간파기도도립위치;최후,채용변증익LQR공제방법장량파간동시은정재도립평형점.변증익LQR공제기적로봉성교강,피면료유우파간상태변화이인기소차위이적충격.방진화실물실험균험증료해공제방안적유효성.
A control scheme based on variable gain LQR technique is proposed in order to realize the swing-up control of nonlinear double inverted pendulum under restricted rail length. Firstly, a variable- parameter switching controller is designed to swing up the first rod to the upright position based on Lyapunov function; and the displacement of cart is restricted via limiting the maximum velocity of cart. Secondly, the first rod is stabilized at upright position by utilizing variable gain LQR technique; and at the same time the second rod is swung up by using control strategy of "equivalent cart". Finally, the both rods are stabilized around the unstable equilibrium point by using variable gain LQR technique. Because of the good robustness of the variable gain LQR controller, the displacement impact of cart which is caused by the change of rods's statement is avoided. The simulation and experiments demonstrate the effectiveness of the proposed control scheme.