State feedback pole assignment technique is used to gain fast tracking of the output voltage, and a repetitive control is designed to reduce voltage distortion under nonlinear loads.

Let's start by looking at a common technique in many PHP applications: placing certain kinds of information in variable assignment statements at the top of the program.

Today, it is a rather arduous assignment for controlling slope unstability, and it has very important meaning to study analysing stability and treating technique for slope deeply.