A four-degree-of-freedom vehicle vibration model is set up based on bond-graph theory and the state equations are deduced. Selecting the minimum sum energy of vertical and pitching vibration and the energy needed to provide control force as the objective function, adopting the Linear Quadratic Gaussian(LQG) control strategy, the optimal control plus and the Kalman filter plus are obtained.

A four-degree-of-freedom vehicle vibration model is set up based on bond-graph theory and the state equations are deduced. Selecting the minimum sum energy of vertical and pitching vibration and the energy needed to provide control force as the objective function, adopting the Linear Quadratic Gaussian(LQG) control strategy, the optimal control plus and the Kalman filter plus are obtained.

Prototype and instance manifestations get a semi-qualitative representation and symptoms refer to means-end and bond-graph entities in a new approach, suited to human diagnostician's conceptual view.

Hydraulic techniques have been broadly used in the transmission sys-tem of shaft kiln. But there are a lot of problems at present. For instance,the failure of solevoid valves and the damage of pumps. So, it is necess-ary to look for more proper design method by researching the dynamic c-haracteristics of the system. Bond graph method is applied to translatehydraulic sketch into bond graph, and according to the bond graph, stateequations are listed, then computer program is usedto simulate the realsystem. Satisfying...

Hydraulic techniques have been broadly used in the transmission sys-tem of shaft kiln. But there are a lot of problems at present. For instance,the failure of solevoid valves and the damage of pumps. So, it is necess-ary to look for more proper design method by researching the dynamic c-haracteristics of the system. Bond graph method is applied to translatehydraulic sketch into bond graph, and according to the bond graph, stateequations are listed, then computer program is usedto simulate the realsystem. Satisfying results are obtained by imputing real parameters. Theresults illustrate that peak pressure ist wice as much as static pressure.Therefore, it is improper to design static pressure according to narmalload. This essay propounds five suggestions to improve the hydraulic sy-stem of shaft kiln. Bond graph method is effective to study dynamic ch-aracteristics of general hydraulic transmission system.

Based on bond graph theory, the bond graph model of a vehicle vibration system with five degress of freedom, has been set up, the state equation derived and the dynamic simulation program established. In addition, the vibration responses of a light truck and a light crosscountry vehicle to a triangle obstacle excitation were calculated, the effect of suspension system parameters on vibration characteristics was analyzed. Finally, the comparison between the experimental results and the theoretical calculations...

Based on bond graph theory, the bond graph model of a vehicle vibration system with five degress of freedom, has been set up, the state equation derived and the dynamic simulation program established. In addition, the vibration responses of a light truck and a light crosscountry vehicle to a triangle obstacle excitation were calculated, the effect of suspension system parameters on vibration characteristics was analyzed. Finally, the comparison between the experimental results and the theoretical calculations and the proposals for improving vehicle ride comfort performances were given in this paper.

Bond graph —— a method of system dynamics is applied in this paper to the dynamic analysis and digital simulation of a vehicle air brake system. Based on the bond graph model drawn up from the layout of the brake system, a matheraatical model is derived and then calculated by the CSSF software. A comparison between calculated and experimental results is made which shows an acceptable accuracy. Some suggestions of future work are also discussed in the paper.