The Data Physics SignalStar Engine Simulator Controller is used to provide closed loop control of the engine speed and torsional vibration. The user can specify harmonic orders and torsional vibration amplitudes to simulate engines of any displacement and number of cylinders.
Harmonics are individually generated and controlled. Analog input and output channels provide better than 120 dB of dynamic range for accurate control of harmonic amplitudes. Harmonic amplitude can be specified as an acceleration level (measured on control accelerometer) vs. engine RPM, or acyclism (%) vs. engine RPM.
Engine speed can be programmed as a combination of RPM sweeps (linear or log sweep rate) and constant speed segments. Engine speed can also be controlled manually and individual harmonics can even be turned on and off by the operator during a test.
The engine simulator controller uses two analog outputs to provide both the speed control for the motor and the excitation for the rotary actuator. The excitation signal sent to the rotary actuator is a summation of the desired harmonic signals. The control response signal is measured on the accelerometer mounted tangentially on the output flange of the rotary actuator. Digital tracking filters are used to extract the amplitude of each harmonic for use in precise closed loop control of the harmonic amplitudes. Each harmonic is independently controlled. The amplitude of each harmonic is controlled as acceleration vs. engine RPM. The radius of the accelerometer location on the output flange is used to convert tangential acceleration to acyclism.
The engine simulator controller supports ActiveX communication for integration with the engine other data acquisition and test control functions.
Download more information on the SignalStar Engine Simulator Controller.