Analysis Of Dynamic Characteristic And Control Of Inertial Loads On Tandem Vibratory Roller

Owing to high performance of surface compaction, tandem vibratory roller has been used widely today. However, the start- stop dynamic process of vibratory roller has brought some problems which seriously affect the performance and reliability of the vibratory rollers. This paper discuss the dynamic characteristics of the engine and hydraulic system, analyse the factors affecting the dynamic process, study the means to control the inertial load producing in dynamic process. After test validation, those methods can obviously improving the dynamic quality and reliability.After analysis the load characteristics of the work cycle, the author found that inertial load plays a major role during dynamic process and the peak load are more than 2 times of steady load.in the dynamic process inertial load showed as the pressure impaction, off speed or exceed the speed limit of the engine and so on. Accordingly, the paper brings forward the goal of the dynamic characteristic controlling. So, the major content to improving the dynamic characteristics of the tandem roller should be reduce the pressure impaction and decrease dynamic power output of engine caused by dynamic loads.at the same time improve reliability of the machine and ensure the compaction quality.According to the test analysis of dynamic process, dynamic process can be judged by the values of the adjustment time, pressure impaction, engine speed fluctuation, the dynamic power. The control of inertial load can meet the demand by suppress inertial mass and acceleration. Inertial mass can be reasonably matched by chose the motor displacement and the speed ratio of reducer. And acceleration can be reduced by adjusting and controlling the characteristics of the hydraulic system.In the hydraulic system inertia load is shown as pressure impactions. Adjustment of the dynamic process should give priority to the adjustment time, and reduce the pressure impaction, instantaneous power and engine speed fluctuations. The paper studies the dynamic characteristic and the controlling method of driving system and the vibratory system. The driving system should adopt throttle control and hydraulic system parameters (motor displacement) together, and the vibratory system can use throttle control and electric control. Through the test, the value ranges of the technical have been making certain.After the analysis of the properties of engine and double transmission system work together, adjustment method has been lodged. Dynamic characteristics of engine and double transmission system work together can be controlled by suppress the peak value of the single system and stagger that of each other. Peak-value suppressing should consider throttle control and electric control. And the laging control should use the start-up laging control.Grounding on dynamic co-simulation of Adams and AMEsim, platform has been build up after experiment regulation and theoretic analysis. The measure of throttle selection, three segment electric controls, and accumulator and so on have been discussed on the platform. These can spread the space of the inertia load controlling.The study of the paper make progress in the dynamic performance of the domestic tandem vibratory roller.The conclusions of the paper are significant in both research and application in upgrading performance and energy saving of the tandem roller. The strategy of adjusting the engine and transmission system working together, would offer means to improving dynamic performance of other construction machines.