Impedance based control for internal combustion engine test beds

In this contribution a new impedance based control scheme for internal combustion engine test beds is proposed, which allows to generate load torques on a crank angle based level. The new test bed control scheme is based on a cascade structure. An impedance model generates and delivers a desired value to the shaft torque control loop. The torque controller is obtained from optimal control theory and is realised as a LQR controller. By a suitable parametrisation of an LQR control algorithm, specific performance variables such as the torque control error or the energy, dissipated in the test bed shaft and thereby the bandwidth of the control system can be influenced directly. Simulation results are presented to illustrate the performance of the new control algorithm.