基于模糊PID步进电机升速算法的研究应用

为了实现一种模糊PID升速控制电机,提出了模糊PID控制器的自整定控制方法。首先对被控对象步进电机建立S型升速算法,解决电机启动产生失步、冲击等问题。然后利用数学模型推导出传递函数,根据模糊规则建立模糊PID控制器。最后进行仿真控制。研究表明:该方法具有响应曲线调节精度高、超调量小、动态响应快等优点。

步进电机在电脑刺绣机中的应用

介绍了电脑刺绣机系统中步进电机的一般选用方法及注意事项 ,探讨了步进电机的速度控制问题 。

Endoscopic Effects on Peristaltic Flow of a Nanofluid

In the present investigation we have studied the peristaltic flow of a nanofluid in an endoscope. The flow is investigated in a wave frame of reference moving with velocity of the wave c. Analytical solutions have been calculated using Homotopy perturbation method （HPM） for temperature and nanoparticle equation while exact solutions have been calculated for velocity and pressure gradient. Numerical integration have been used to obtain the graphical results for pressure rise and frictional forces. The effects of various emerging parameters are investigated for five different peristaltic waves. Streamlines have been plotted at the end of the article.