Multivariable control of a test bed for differential gears

Abstract

Common problems related to the control of power train test beds are the coupling of the two typical controlled variables rotational speed and testing torque as well as resonant torque oscillations. This work presents a simplified non-linear mathematical model of a test bed for differential gears including the unit under test suitable for controller design. Based on this system model, a new control concept with input–output decoupling and feedback linearisation is developed to overcome both previously mentioned problems. Simulation studies using the proposed control structure as well as a conventional control concept for power train test beds show the superiority of the new controller.Finally the proposed controller was implemented on real-time processing hardware and tested on a commercial test bed for differential gears to prove the performance of the new control concept in practice.