Abstract
Multi-pump hydraulic systems have a wide range of applications requiring large flowrate. As a highly integrated component, the cartridge check valve (CCV) control unit has an important influence on the overall performance of multi-pump large-flowrate systems. It is a critical issue to design its parameters properly, for mismatched parameters may lead to poor performance or even accidents. On the one hand, it is challenging to implement accurate theoretical analysis due to strong nonlinearity and complexity. On the other hand, the implementation of optimal design using a trial-and-error approach is time-consuming and expensive. To solve these problems simultaneously, this work develops an automatic method to design the parameters of the CCV control unit based on the combination of numerical simulations and the nondominated sorting genetic algorithm III. The parameter discretization method based on probability has been proposed to improve the performance of the optimization algorithm. Both subsequent simulations and experimental results confirm that the performance indicators of the optimized hydraulic system such as backflow and response time have been significantly ameliorated compared to the original hydraulic system. In general, this work develops a time-saving and convenient method for parameter optimization of the CCV control unit, which can also serve as a reference for component design and selection in similar hydraulic systems.