1. A system for testing an engine, the system comprising: a plurality of simulated accelerometers, each simulated accelerometer including: an engine simulator that generates a plurality of engine simulator outputs; an accelerometer signal simulator that receives the plurality of engine simulator outputs and generates a plurality of accelerometer signal simulator outputs; an accelerometer waveform generator that receives the plurality of accelerometer signal simulator outputs and synchronizes at least one of the plurality of accelerometer signal simulator outputs to a reference timing signal from one of the plurality of engine simulator outputs, the accelerometer waveform generator generating a plurality of accelerometer waveform generator outputs; a filter section that receives and filters noise from the plurality of accelerometer waveform generator outputs to generate a plurality of filtered accelerometer waveform generator outputs; a mixer that receives and combines each of the plurality of filtered accelerometer waveform generator outputs to generate a single filtered accelerometer waveform generator output; and a charge converter that receives and converts the single filtered accelerometer waveform generator output to a current charge vibration simulation output; and a monitor unit that receives each current charge vibration simulation output from each of the plurality of simulated accelerometers to measure a simulated total engine vibration.