Recently,when the science research of ocean and the exploitation of the abyssal resource is progressing rapidly,a new problem has brought up in the control system for winching the undersea platform as the environment of ocean is complex.

It also provides a method for correcting the determing target track deflection which is caused by the underwater platform inclination an swing due to water flow, which is simplyfied when the underwater platform inclination is not great, The data obtained from oceanic experiments are applied to do simulation proofs.

Serious biases in both the long-range detection and accurate location track, may be caused by the rocking of underwater platform in the complicated ocean current and tide, and may become great barricades on target detection, identification and classification.

System design and develop of sending platform for MMS;

Design of the offshore platform model similar to the natural frequency of original shape;

Detection of offshore platform structure crack based on frequency response function;

Dynamic reliability analysis of offshore platform considering fatigue failure;