模拟进化型状态变量滤波器的没计

摘要

Once after the structure of the former filter is fixed, its own parameters cannot be changed,but technical parameter targets of an analogue evolvable state variable filter can be changed with the external environment real-time changing. A kind of hardware structure of the filter is given, and basic work theory of the evolvable hardware is introduced.One kind of improvement multi-object self-adapted genetic algorithm is utilized, and parameter optimization of the evolvable state variable filter is realized.Structure of high Q value four-order state variable filter is built by cascade method,and it is able to meet performance request in its stop-band, passing band, transition band, and practicality of the filter has been simulated and verified.Value of evolutionary filer's parameters is in line with theoretical value exceedingly,and the simulation result is satisfying.%以往的滤波器一旦结构固定后是不能改变其自身参数的,而进化型模拟状态变量滤波器能够随着外界环境的变化实时地改变自身的技术参数指标.给出该滤波器的硬件结构,介绍了该进化型硬件的基本工作原理.运用一种改进的多目标自适应遗传算法,实现进化型状态变量滤波器参数优化.采用级联法所构成的高Q值四阶状态变量滤波器能够满足其在阻带、通带以及过波带方面的性能要求,对其实效性进行了仿真和验证,进化的参数值符合理论结果,仿真的结果令人满意.