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Based on the main concept of sliding mode control (SMC) theory, this study proposes a robust control law for a class of multivariable linear uncertain systems. As in conventional SMC, the developed method provides robustness against to matched model uncertainty and unknown external disturbances. A control gain used for system transformation is obtained by incorporating linear matrix inequalities (LMIs)...
In this work, we propose a fluid tapping mode atomic force microscopy (AFM) implemented by a DVD pickup head. The use of DVD pickup head minimizes the volume of the hardware system, and thus reduces the measurement error caused by heat expansion. In order to realize the system mentioned above, we design a Q-controller to modulate the interaction force between the tip and the sample. Increasing the...
In this paper, we propose a highly maneuverable autopilot system based on multiple Thrust Vector Control (TVC) mechanisms and Divert Control System (DCS). The strategy of the cooperation of multiple TVC mechanisms and DCS is discussed. Moreover, the decision and control part in missiles: guidance law (GL) and autopilot is presented. The GL is designed with dynamic sliding mode control (DSMC) to eliminate...
This paper presents a smooth sliding mode control approach for the motion control of a Stewart platform. The control scheme is proposed given that the overall system parameters are subject to uncertainties while only the positions and velocities of links are measurable. To achieve high performance tracking control of a 6 DOF Stewart platform normally requires the full knowledge of the system dynamics...
This paper proposes a new type of a non-conventional electro-magnetic actuator (EMA) for a micro-positioner with larger moving range. It is a repulsive magnetic system consisting of a motion carrier and two active coils. The movement of the motion carrier is due to the repelling force between the coils and the magnets affixed to the carrier. First, the dynamic model is derived and analyzed. Next,...
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