The Theory And Experiment Researching Of Examination Equipment For Tank Stabilizer

The paper is based on the project "Anti-rolling tank test equipments on the ship" among the country "211" key invested projects. The design and realization of examination equipment and related theoretical questions are analyzed and further discussed.The examination equipment of anti-rolling tank on the ship is a kind of specially complex system. So far the country has no test equipments in a large scale. To test the performance of anti-rolling tank more conveniently, the paper sets up the test platform of two freedoms. The platform can analog rolling and swaying motion of ships. The moment of inertia, damping and restoring force can be adjusted. Two electro-hydraulic servo systems analog rolling moment and swaying force of wave respectively. The two systems both use electro-hydraulic servo valves, in which the analog rolling moment system adopts gear-rack swing hydraulic-pressure oil vat with torque sensor, while the analog swaying force system employs double shanks hydraulic-pressure oil vat with a placement sensor.Models of electro-hydraulic servo valve, gear-rack swing hydraulic-pressure oil vat, double shanks hydraulic-pressure oil vat, placement sensor and torque sensor are selected in order to analog the rolling moment and swaying force more accurately. Transfer functions of electro-hydraulic moment servo system and placement servo system are presented and the system parameters are gained. In addition, the mathematical model of anti-rolling tank is set up and system equation of "Ship-Tank" is explained and simulated. At the same time, the application of pole configuration, PID control and nerve network PID control in the electro-hydraulic servo system is developed. The simulation results show that some control strategies are in effect.Considering the realization of the system, the paper adopts incremental mathematical PID controller and manufactures the power board, servo amplified board and signal processing board. And the hardware circuit and sensors are checked and debugged. The run is very good.According to the test platform, the monitoring control system based on computers is designed, which can output voltage signals of rolling moment and swaying force that regular wave and irregular wavepress on ships. The system also gathers and analyzes test data from the sensors. The test results appear on the screen in real time.The paper goes on test on rolling and swaying motion by regular waves and rolling by irregular waves, and investigates the anti-rolling performance of passive anti-rolling tank. The test validates the anti-rolling principle of passive anti-rolling tank and provides test data for designing and installing anti-rolling tank on ships in the future.The set of equipment is permitted by the country "211" projects in June, 2001.