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Atomic Fore Microscopes (AFMs) are widely used for nanoscale applications. Until recent developments these instruments were controlled in open loop or by a PID type controller. In the last decade model-based control techniques emerged for controlling AFMs, but in almost all cases the multivariable behavior was ignored. In this paper, we present a multivariable control strategy using the standard plant...
Piezo actuators are often used in positioning devices that require (sub)nanometer resolution. For the purpose of control design a model is needed. In this paper, we develop an electromechanical dynamic model of a walking piezo actuator. The walking piezo actuator contains four legs, each with two electrically separated piezo stacks. The legs are modeled as a connection of coupled mass-spring-damper...
The control design for the variator in a pushbelt continuously variable transmission (CVT) is investigated. The variator enables a stepless variation of the transmission ratio within a finite range. A conventional control design for the variator is typically obtained by the use of a variator model, which incorporates large uncertainties and, therefore, limits the variator efficiency. In this paper,...
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