基于MKL26Z256VLL4的风板控制系统设计

Wind Board Controlling System Design Based on MKL26Z256VLL4

以飞思卡尔MKL26Z256VLL4单片机为核心控制芯片,设计了风板控制系统。系统以低功耗的OLED模块迷你12 864为显示器,通过按键选择工作模式及设定风板位置角度;采用高精度角位移传感器WDD35D-4实时检测角度的变化,经单片机12位AD采样,应用增量PID算法改变PWM的占空比调节2台直流风机的转速使风板达到预置角度。实验结果表明,系统操作界面简明,风板在空载及负重的情况下都能平稳准确地到达预设角度、并能在2个角度之间实现快速的周期性摆动,且动态实时显示风板的位置角度,达到了设计要求。

It is based on core-controlling Freescale chip of MKL26Z256VLL4 MCU to design a wind board controlling system. With a low consumption of the OLED module mini 12864 for displayer, the system uses keys to set work modes and angles. It tests angle change at all times by applying high precision angular sensor WDD35D-4and samples by12-bit MCU AD. With the compute of incremental PID control, it changes duty cycle of PWM to adjust the speed of two dc fans to accord with preinstalled angle. The test results prove that the operating system is simple and the angle of wind board can be displayed in a dynamic way. And the results also show that under the condition of the no-live load or bearing a load, the wind board can reach the preinstalled angle smoothly and accurately and it can swing rapidly and periodically between the two angles. So the system has met the design requirement.