Simulation of a hydraulic drive with volumetric regulation of an amphibious vehicle

Introduction. Currently, hovercraft (hovercraft) are widely used all over the world due to their amphibious ability and cross-country ability on water and simply prepared sites with low load-bearing capacity.At the same time, in practice, hovercraft have two main systems that provide movement: lifting and traction, which can be either combined (working from one source of mechanical energy) or separate. In a separate version, the lifting system has the following advantages: simplicity of design, ease of control (including balancing of the vessel), ease of maintenance and repair of the system. The disadvantage is that in the separate version of the hovercraft, two independent sources of mechanical energy are required for both the lifting and traction systems. The purpose of this study is to develop a joint mathematical model of the hovercraft lifting system, consisting of an internal combustion engine, a hydraulic transmission and a fan supplying air to the air cushion sections. Methods. In the MATLAB/SIMULINK environment, the regulation of engine power when the ship is moving on different supporting surfaces is analyzed from the point of view of increasing the efficiency of the fan and the entire system. A design diagram of the system is presented, and acceptable transient characteristics are obtained. The efficiency, range of optimal operation of the pump and Sauer-Danfoss hydraulic motor are assessed. The process of regulating the hovercraft from the established mode to a new state when traffic conditions change is considered. Results. Based on the simulation results, the influence of the input control signal (a parameter for regulating engine operating modes) and the disturbing signal (the pressure drop coefficient that determines the properties of the supporting surface) on the parameters characterizing the movement of the vessel is shown.Conclusion. The developed mathematical model allows you to select and evaluate parameters for regulating the engine operating mode when the vessel is moving on different surfaces, analyze and improve the energy efficiency of the system.

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Computational study of the hovercraft hydraulic transmission

Sosnovsky

Nguyen

2023

PoHEI.MB

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Implementation of the vehicles optimal operating modes and improvement of their energy efficiency appears to be an urgent task. The paper considers a hovercraft with the hydraulic transmission. Combined mathematical model of hydraulic transmission and fan supplying air to the air cushion section was developed. Automatic control of the pump swashplate inclination angle with the vessel moving upon different support surfaces was analyzed in the MATLAB/Simulink environment in terms of increasing efficiency of the fan and system operation. The system calculation scheme is presented, and acceptable transient characteristics were obtained. The developed mathematical model makes it possible to select and assess optimal frequency of the hydraulic motor shaft rotation with the vessel moving upon different surfaces, analyze and improve the system energy efficiency. Using the proposed transmission control unit in a hovercraft allows maintaining the fan efficiency and the required vessel height above the supporting surface.

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Simulation of a hydraulic drive with volumetric regulation of an amphibious vehicle

Cited by 3 publications

References 5 publications

Fan Rotating Speed Control with Volumetric Regulated Hydraulic Drive in a Hovercraft

Fan Rotating Speed Control with Volumetric Regulated Hydraulic Drive in a Hovercraft

Mathematical model of the hovercraft lift system

Computational study of the hovercraft hydraulic transmission

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