{"title":"Bond Graph Modeling of Inter-Actuator Interactions in a Multi-Cylinder Hydraulic System","authors":"Mutuku Muvengei, John Kihiu","country":null,"institution":"","volume":50,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":282,"pagesEnd":292,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/13901","abstract":"In this paper, a bond graph dynamic model for a valvecontrolled\r\nhydraulic cylinder has been developed. A simplified bond\r\ngraph model of the inter-actuator interactions in a multi-cylinder\r\nhydraulic system has also been presented. The overall bond graph\r\nmodel of a valve-controlled hydraulic cylinder was developed by\r\ncombining the bond graph sub-models of the pump, spool valve and\r\nthe actuator using junction structures. Causality was then assigned\r\nin order to obtain a computational model which could be simulated.\r\nThe causal bond graph model of the hydraulic cylinder was verified\r\nby comparing the open loop state responses to those of an ODE\r\nmodel which had been developed in literature based on the same\r\nassumptions. The results were found to correlate very well both\r\nin the shape of the curves, magnitude and the response times,\r\nthus indicating that the developed model represents the hydraulic\r\ndynamics of a valve-controlled cylinder. A simplified model for interactuator\r\ninteraction was presented by connecting an effort source with\r\nconstant pump pressure to the zero-junction from which the cylinders\r\nin a multi-cylinder system are supplied with a constant pressure from\r\nthe pump. On simulating the state responses of the developed model\r\nunder different situations of cylinder operations, indicated that such\r\na simple model can be used to predict the inter-actuator interactions.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 50, 2011"}