A new position estimation algorithm was presented which used as the theory foundation to design a full digital position estimation hardware scheme that can implement on FPGA (Field Programmable Gate Array),and gived the designs of all modules.

A computing technique called carry evaluation is proposed and applied in software implementation of FastMM mdular multiplication algorithm.

Compared with arithmetic mean position estimate including Hampel three-parameterestimate and Huber place-scale estimate that can be used to deal with outliers is discussed.

An electromotive force observer and position estimation with high precision for a permanent magnet synchronous motor;

In order to avoid some control problems on mechanical sensor,a control strategy based on the position estimation for doubly-fed generators is presented.

<Abstrcat> A position estimation scheme in visual servo system with single camera mounted on a robot is proposed.