This paper introduces the control technology of double-wheel vibratory roller, and develops a roller control system based on RC6-9 controller. The control method and flow chart of key systems such as driving system, vibration system and sprinkler system are given. The rationality of the control method is verified by simulation test.
There are many problems affecting compaction quality in the operation of double-wheel vibratory roller, such as unstable frequency of vibration, large pressure impact of the system and so on.
At present, the application of high frequency electronic control technology in double-wheel vibratory roller is still in the primary stage in China, which can not fully solve the above problems. The control technology of double-wheel vibratory roller studied in this paper aims at the above problems which affect compaction quality, and puts forward a unique control method to improve compaction quality. The RC6-9 controller of Bosch Rexroth Company, which manufactures hydraulic components and corresponding controllers, is selected as the controller of the prototype studied in this paper through longitudinal and horizontal comparison. Its performance is shown in Table 1.
The whole control system is connected by CAN bus. The specific composition is shown in Figure 1. According to the functional requirements of the control system, the control methods of key systems such as driving system, vibration system and sprinkler system are studied. Fig. 2 is the control flow chart of driving system, Fig. 3 is the control flow chart of PWM slope technology, thermostatic element Fig.
4 is the control flow chart of vibration system and Fig.
5 is the control flow chart of sprinkler system.
BODAS 2.0 software is used to simulate and debug the control system, check whether all the signals are read in, test the function of the control system, and see if the expected goal can be achieved. The main equipment of the test: 32-bit input and output test board, 220V power supply, special PC for experiment, general multimeter, conversion card between CAN bus and USB of PC and RC6-9 controller.
The specific connection is shown in Figure 6. The prototype is simulated and debugged.
The main contents and results of the debugging are shown in Table 2.
The parameter setting of each input and output signal is reasonable.
All parts of the control system work normally. The preset function of the control system is basically realized.
In this paper, the hardware selection of the control system of double-wheel vibratory roller is made, some control methods are put forward, and the simulation test is carried out to verify the rationality of the control system function.