Small and Lightweight Electric Actuators.

Sliding Mode Control in Mechanical Systems with Electric Actuators

The design procedure should consist of selecting the switching manifold with sliding mode in order to design the desired dynamics of the motion equation and finding a discontinuous control function such that the state reaches the manifold and sliding mode exists in that manifold. The design of control for systems given by (1) can be easily performed for systems in the so-called Regular form. If...

Small Electric Ophthalmoscopes.

DR. HARDCASTLE's reference in the June issue to the electric ophthalmoscope prompts me to offer some general comnmnents on this instrument; it has such obvious advantages in being easier and more rapid to use than the ordinary direct ophthalmoscope if onlv because the observer is rendered less dependent on a fixed attitude of the patient's head. The observer can sit in front of the patient and ...

Small Satellite Attitude Control Using Linear Moving Mass Actuators

The subject of this research is to study the use of internal moving masses as the primary means of attitude control for a small satellite platform. The goal of this research is to validate the dynamic model formulated in [1] which describes the under-actuated rotational dynamics of a 3U cubesat with two internal orthogonal linearly translating masses. Models have been developed to simulate angu...

Periodic attitude control techniques for small satellites with magnetic actuators

The problems of attitude stabilization and disturbance torque attenuation for a small spacecraft using magnetic actuators is considered and a solution to the problem in terms of optimal periodic control is proposed, based on an optimal estimation and compensation scheme for external disturbances for linear time-periodic systems.

Exploiting individual wheel actuators to enhance vehicle dynamics and safety in electric vehicles