Controls NI ELVIS Controls Device—The Quanser Controls Board for NI ELVIS III is an add-on application board that replaces the default prototyping board on the NI Engineering Laboratory Virtual Instrumentation Suite III (NI ELVIS III). This device is designed to accurately match dynamic models based on both physical principles and experimental tests. The servo has a highly linear motor response allowing for accurate modeling and control design. With integrated encoder feedback for both the motor and the optional pendulum accessory, you can easily configure the servo for control tasks ranging from motor speed and position control up to and including inverted pendulum swing-up and balance control.