新型自适应控制器的设计及仿真

对控制性能要求较高、不能直接应用自适应控制理论构成自适应控制系统,可引入δ变换取代z变换,利用零极点配置和最小二乘法,设计一种新型的自适应控制器,解决了z变换可能产生不稳定零点的自适应控制问题。仿真结果表明,系统固有频率ω和阻尼比ζ的变化范围分别在105-210 rad/s、0.1-0.2,各参数存在较大摄动,但系统的稳态精度和响应速度几乎未受影响。该新型自适应控制器能够较好地抑制系统各参数的摄动,设计方法实用、有效。

Design and simulation of new type adaptive control

Aimed at eliminating the impossibility of directly applying adaptive control theory to develop control adaptive control system, as in the case of least phase system involving higher control capability, this paper introduces the adoption of t%transposition instead of z-transposition to structure a new auaptive controller by zero-pole point configuration theory and least squares method and proposes the solution to the adaptive control problem that z-transposition may give rise to an instability zero-pole point. Simulation results show that the inherent frequency to and damping ratio ζ are in 105 -210 rad/s, 0.1 - 0.2 respectively, each parameter showing a greater perturbation, but steady precision and response speed of the system go almost unaffected. This new adaptive controller, able to inhibit each parameter perturbation of system offers a practical and effective design methods.