Hydrodynamics Research on Amphibious Vehicle Systems： Modeling Theory

For completing the hydrodynamics software development and the engineering application research on the amphibious vehicle systems, hydrodynamic modeling theory of the amphibious vehicle systems is elaborated, which includes to build up the dynamic system model of amphibious vehicle motion on water, gun tracking-aiming-firing, bullet hit and armored check-target, gunner operating control, and the simulation computed model of time domain for random sea wave.     

原招标书：海上两栖车

海上两栖车，在未来的渡海登陆作战环境中，将扮演极其重要的角色，其不但承担着打击滩头残余敌人的重任，还负责把士兵运送上岸。本期未来总设计师，我们将刊登一款海上两栖车，设计者为姜昱赟，本期未来总设计师，我刊邀请了我国著名的坦克设计专家，63A式水陆两栖坦克的设计者张声涛教授。     

Steering Dynamic Performance of an Electric Transmission Tracked Vehicle Based on Rotating Speed Control

In order to analyze steering dynamic performance of an electric transmission tracked vehicle exactly, modern design theory and methodology-collaborative simulation and virtual prototype are applied. The 3-D multi-body dynamic model of full vehicle running gears and control system model are built based on the simulation platform on dynamic analysis software known as RecurDyn/Track-HM and control system analysis software known as Matlab/Simulink. Theory analysis and collaborative simulation of turning kinematic/dynamic performance in different velocity and turning radius are made. Comparing the test result with theory computation validates the correctness of the model. The method has instructional significance of solving the existent modeling problem, comprehension of turning performance and test debugging strategy, and also forms a new idea of research on dynamic characteristics for the electric transmission tracked vehicle＇ s electric propulsion system.