boost升压电路，使用电压外环和电流内环双闭环控制，可以很好地稳定电压，保持功率恒定，采用电流模式-boost boost circuit, using the voltage outer and inner current double closed-loop control, can be a good and stable voltage, keep the power constant current mode

四轴飞行器PID控制。Simulink仿真。内外环控制。-Quadcopter PID control. Simulink simulation. Inner and outer loop control.

三相桥式全控PWM整流电路，采用电压外环、电流内环的双闭环控制(Three phase bridge type fully controlled PWM rectifier circuit adopts double closed loop control of voltage outer loop and current inner loop.)