A Can Interface Of The Digital Control Handle Development Of Its Function Testing Software Design

Based on the analysis of the automatization, intelligence, integration development trend of modern construction machinery, and by drawing lessons from the characteristics of controlling system of current abroad modern construction machinery, this thesis adopt a kind of modern construction machinery controlling system solution which bases on CANbus (Controller Area Network). Considering current condition of laboratory, this paper regards digital controlling joystick (short for digital joystick) as research object and proceeds systemic research on hardware and software design of main parts of the system under CANbus environment. The results have proved that the system gain satisfied result in practical use.The paper first summarizes present condition about fieldbus and digital joystick both in domestic and international, analyzes the characteristics of CANbus and advantage and disadvantage of adopting acceleration sensor as digital joystick's sensitivity part in princinple. Then, hardware and software design of digital joystick with CANbus interface are expatiated detailedly, the interference source of system is also analyzed, corresponding solution is put forward. In order to calibrate and analyze the performance of digital joystick, corresponding function testing software is developed. The software can calibrate, simulate and analyze the signal of digital joystick.In order to validate the developed software and hardware, the paper designs corresponding experiment scheme and proceeds experiment in labtorary and workshop. The experiment data shows that software and hardware design of digital joystick is correct, obtains expectant goal.Finally, the paper studys the method of signal processing of digital joystick under vibration and impact environment, the contrast study has also been implemented to compare the filter function of IIR and FIR filter which are different in principle. The autocorrelation and corelation relation between signal of joystick is also analyzed. By using of perioddiagram and modern spectral analysis technology, the power spectral of the signal of digital joystick is analyzed.All these means provide basis for improving digital joystick's environment adaptability.