this paper employs nonlinear disturbance observer (ndo) for robust trajectory-free nonlinear model predictive control (nmpc) of biped robots. the ndo is used to reject the additive disturbances caused by parameter uncertainties, unmodeled dynamics, joints friction, and external slow-varying forces acting on the biped robots. in contrary to the slow-varying disturbances, handling sudden pushing ...

Permanent Magnet Linear Synchronous Motor has been used widely in the industrial application and transportation system. However, a need of mechanical sensors is a drawback for its control system, which restricts the application range seriously. In order to solve the above drawback, the sensorless vector control method was proposed in the paper. The mathematic model was established for the senso...

In this paper, a new force observation approach is proposed to realize superior wideband and periodicity-free sensorless control system. The observer established by the periodicity estimation integrated singular spectrum analysis based disturbance observer. designed significantly separate essential components of from extreme noise contamination. Accordingly, bandwidth sensing considerably broad...

In the vector control system of a tubular oscillating permanent magnet synchronous linear motor, it is difficult to obtain accurate feedback information from conventional mechanical sensors under bad and complex working conditions. This paper presents new predictive current designed estimate speed oscillation motor. It implements two techniques: The first technique using sliding-mode observer’s...

This study investigates the effect of an inductance model on sensorless control performance a synchronous reluctance motor (SynRM). A high-frequency voltage injection method based position dependence and extended electromotive force estimation are applied to achieve control. More specifically, inductances modeled in several patterns two methods. Subsequently, characteristics steady transient st...

wind energy today, has attracted widespread interest from among a variety of sources of renewable energy in the world. owing to the increasing demand for production of electrical energy for electricity networks by using wind power, it is essential that wind power plants are actively incorporated in the network’s performance using an appropriate control system. in general, these wind power plant...

a fault-tolerant control (ftc) methodology has been presented for nonlinear processes being imposed by control input constraints. the proposed methodology uses a combination of feedback linearization and model predictive control (flmpc) schemes. the resulting constraints in the transformed process will be dependent on the actual evolving states, making their incorporation in the design context ...