血压自适应控制系统研究

本文设计一个自适应血压自动控制系统,首先,通过动物实验,获得了受控对象的参数变化范围的信息.在此基础上,我们应用参考模型和自校正调节器两种算法设计自适应控制系统.计算机仿真证明这两类算法均可成功地应用于血压的自适应控制,尽管受控对象存在未知时变延时,时间常数和增益的变化.最后,将设计的系统在动物(狗)中作了检验.在18条狗上作升压或降压试验证明,两种算法均有良好的过渡过程特性,这一系统将可应用于临床,以改进药物注射系统的性能.

AN ADAPTIVE CONTROL SYSTEM OF BLOOD PRESSURE

An adaptive control system was designed for blood pressure regulation. At first,the blood pressure dynamic responses to cardiostimulatory or vasoac-tive drug were recorded from the animal experiments.By using least-squares method,the range of parameters of the plant was obtained.Based on these information,adaptive control systems were designed by using model reference algorithm and self-tuning algorithm.The stability of model reference adaptive system with variable time delay was designed by hyperstability criterion,and pole-assignment selftuning controller was designed based on recursiue least-squares algorithm. Computer simulation indicated that these algorithms might be successfully applied to the control of blood pressure despite the uncertainty in delay,time constant and gain. Furthermore, a series of experiments for raising or reducing blood pressure were performed on 18 dogs. It has shown that these algorithms all have good transient charateristics.We expect that these adaptive controller will improve the performance of drug infusion Systems in clinical treatment