CAJ | 학술논문

实际工业生产中存在着大量多变量时滞过程，由于此类系统输入输出变量间的耦合及时滞因子的影响，使得针对这类系统的控制效果往往达不到令人满意的效果。本文利用解耦控制器，首先对多变量时滞过程的输入输出进行解耦；由于解耦得到的子系统模型非常复杂，因此对解耦后的复杂系统模型提取公共时滞因子，然后用观测器/卡尔曼滤波器辨识(OKID)算法对解耦后的系统进行模型精简，基于该简化模型使用极点配置方法设计离散时间PID 控制律，实现解耦系统对定值信号的跟踪控制。通过对一个化工过程系统进行仿真研究，证明了所提方法的有效性。
실제공업생산중존재착대량다변량시체과정，유우차류계통수입수출변량간적우합급시체인자적영향，사득침대저류계통적공제효과왕왕체불도령인만의적효과。본문이용해우공제기，수선대다변량시체과정적수입수출진행해우；유우해우득도적자계통모형비상복잡，인차대해우후적복잡계통모형제취공공시체인자，연후용관측기/잡이만려파기변식(OKID)산법대해우후적계통진행모형정간，기우해간화모형사용겁점배치방법설계리산시간PID 공제률，실현해우계통대정치신호적근종공제。통과대일개화공과정계통진행방진연구，증명료소제방법적유효성。
There are many multivariable system s with time delay i n the industrial process . Due to the coupling and time delay in these processes, the control performance s are usually not satisf ying . In this article, a model simplification method together with a digital PID controller design ing method is employ ed to the decoupled subsystems . Firstly, the multivariable process with time delay is decoupled into subsystems which are quite complicated. Then, the decoupled subsystems are simplified by a model-reduction method , using observer/Kalman filter identification (OKID) method, to obtain the discrete-time state-space models without involving the common time delay term . Based on the obtained simplified model, a pole assignment method is utilized to design discrete-time PID controller s which can guarantee the set-point tra cking performance of the decoupled subsystems. At last, an illustrative example is given to demonstrate the effectiveness of the proposed method.