Abstract: A method of position/orientation estimation called dead reckoning methodology has been playing an important role in DIS system,which is employed to simulate synthetic warfare environment simulation and military training exercise containing multi-force and multi-platform. First,common DR algorithms and their characteristics are introduced,and then a new valid DR algorithm is presented in this paper. This algorithm is based on two-order transfer function idea and has two feature parameters,which are natural frequency and damper coefficient. The two feature parameters can be real-time calculated by previous state values of last three frames. Last of all,the comparison between the new DR algorithm and common DR algorithms is described and the simulation result is given at the end of this paper.