| For judging the precise and high-speed axes whether complied with a standard, making sure the accuracy and quality of it, the vibration and the dynamic balance of the axes needs to carry on the test analysis. Two ways of dynamic balance can be used: equilibrator and field dynamic balance.The field dynamic balance is used more and more widely because of its convenience,highly active and low price.At the present time, most of dynamic balance instruments are based on chip micro computer, as for performance and capability of memorization of master controls lug are restricted, expandability of system function is limited, the ability of dealing with vast scale data about signal processing is not very intensive, accuracy and speed of dynamic balance are not very ideal, the range of rotator's speed is narrow. In order to meet the quality requirements of spindle assembly, the needs of balancing and increase testing accuracy and make the interface of people and mechanics more friendly, the paper combine field dynamic balance testing technology and digital signal processing technology, develop a dynamic balance and vibration testing system base on DSP(digital signal processing).The paper first expounds the calculation of influence coefficient method for rigid rotorrotor and vector influence coefficient method for flexible rotor and the calculation of phase for balance based on DFT and develops high-speed rotor vibrating balance testing system by utilizing DSP TMS320LF2407 as core chip while referring to intelligent vibrating balance instruments home and abroad.The main circuit structure,chips for central control choosing,input channel of simulation amount design and A/D sampling of the system are compared, choice-making methods and design principle for function modular such as reference vibration signal preprocessing circuit,A/D converter circuit,communication modular,keyboard circuit and liquid crystal circuit presented in the paper.The software development follows top-bottom design idea o f modularization The paper designs the core program frame, measuring rotating speed software, unbalancing calculation and unbalance phase program, data communications program. The system can measure, calculate and demonstrate vibrating signals in real time, and realize data communication with PC through RS232.The system meets the prearranged technical index, and therefore high-speed spindle vibrating balance testing system based on DSP will surely be widely applied. |
