This paper discusses a state space estimation for an electromechanical actuator valve using extended Kalman filter (EKF). A proposed actuator model includes a Tustin’s friction model with strong nonlinearities, hence it represents an accurate model for describing the friction phenomenon in an electromechanical actuator valve. At first the state equations of the model were converted into a time-...

A taxonomic revision of the genus Megalostomis Chevrolat, 1836 (Coleoptera: Chrysomelidae: Cryptocephalinae: Clytrini: Megalostomina) is provided, including new data on geographic ranges. Two new species and 34 new synonymies are proposed within the genus Megalostomis, leaving 42 valid species in the genus. A checklist of the species of Megalostomis is provided, with information on host plants,...