Multi-excitation-source combined control test device

A multi-excitation-source combined control test device includes a vibrating table, a vibration exciter, piezo-electricity elements, an SD vibration control system, a laser vibration measuring instrument, an oscilloscope, a function signal generator and a DC regulated power source, wherein three output passages D1, D2 and D3 of the SD vibration control system are respectively connected with a piezo-electricity actuator in the piezo-electricity elements, the vibration exciter and the vibrating table through three-channel power amplifiers; the vibration exciter and the vibrating table are placed in a frame of a testing piece, which has higher rigidity; the piezo-electricity elements are pasted onto the flexible part of the testing piece; piezoelectric transducers in the piezo-electricity elements are pasted onto the testing piece; output signals Us1, Us2 and Us4 of the piezoelectric transducers are collected by collection channels CH4, CH5 and CH6 of the SD vibration control system respectively; and the three ex