基于滞环比较的自适应扰动观察法研究

Research on Adaptive Disturbance Observation Method Based on Hysteresis Comparison

为了解决传统扰动观察法稳态控制精度低、动态跟踪性能差和误判现象的问题,提出了一种基于滞环比较的自适应扰动观察法,通过滞环比较法进行双向扰动解决由于功率突变导致的误判问题。根据功率的变化通过一个PI控制器自动调节扰动步长的大小,保证稳态跟踪精度的同时,有足够快的响应速度。在MATLAB中建立了基于Boost电路的仿真模型,编写了基于滞环比较法的自适应扰动观察法的S函数。通过仿真验证了新策略的有效性和正确性。

The traditional perturbation and observation method is usually troubled the probiems of low control accuracy, poor dynamic tracking performance and false problem. In this paper, designed was an adaptive perturbation and observation method based on hysteresis comparison, for which, the hysteresis comparative law was used to make bilateral perturbation, so as to find solutions for the misjudgment resulted by power mutation. According to the power changes, the perturbation step size could be automatically adjusted through a PI controller, so as to ensure both the steady-state tracking accuracy and high response speed. A simulation model was established in MATLAB based on Boost circuit, the S function of the adaptive perturbation and observation method based on hysteresis comparison was written. Simulation results prove the effectiveness and correctness of the new strategy.