Abstract: The Electrically Controlled Rotor (ECR), or the so-called swashplateless rotor, is a new concept rotor system brought out at the beginning of the 21st century. To explore the control rules of ECR, first an aeroelastics analysis model is built up. Based on the model, research of the steady control response of SA349 baseline ECR is conducted. The following conclusions are reached: (1) ECR flap control can effectively change the blade pitch, and the time lag is about 0.1 rotary cycle; (2) In the forward flight, the flap collective control will cause significant blade cyclic pitch change; (3) The blade response of flap cyclic control is just similar to that of the conventional rotor. The flap collective and cyclic control experiments are also carried out at a set of testing ECR system. The tests results show good forecast ability of the ECR analysis model and the feasibility of ECR in the practical rotor control.

Key words: electrically controlled rotor, flap, control response, collective pitch, cyclic pitch