This paper presents a new type of haptic device using spherical geometry. The basic idea of haptic devices is to provide users with feedback information on the motion and/or force that he or she generates. Haptic devices have several potential applications, such as for example, fine compliant assembly, VR environment simulation and high precision teleoperation, especially in hazardous or hostil...

An extensive set of software tools for integrated plasma control has been developed, validated, and applied to the DIII–D tokamak to design controllers for plasma shape and both axisymmetric and non-axisymmetric MHD instabilities [1]. The integrated plasma control approach uses validated physics models to design controllers, and confirms their performance by operating actual machine control har...

The knee joint is complex. Surgical procedures such as ACL reconstruction and total knee arthroplasty (TKA) are commonly used to alleviate pain and restore function in knees that suffer from injury or disease. These surgeries affect the kinematics of the joint. It is important to understand exactly how surgical procedures affect knee motion in order to be able to better restore normal joint fun...

Aiming at the construction of infill wall structural column are often used in artificial layer pouring method and top pouring back method, to improve the structure of wall column concrete pouring process, puts forward a new type of structural column concrete pouring machine. The application of this equipment, process worker can finish pouring filled wall structure column and tap filled wall str...

There is a strong motivation for using multiple sensors for feedback control in ultrahigh accuracy data storage devices such as a probe-based data storage device. One elegant way to design such controllers using multiple sensors is to design a direct multi-input-single-output (MISO) controller using either the H2 or H∞ control design paradigm. In this paper we discuss the control of a micro-sca...

Semi-active control devices, also called “Intelligent” control devices, constitute the positive aspects of both the passive and active control devices. A semi-active control strategy is similar to the active control strategy, but this control device has been shown to be more energy-efficient than active devices. A particular type of semi-active control device, the Variable Stiffness Device (VSD...

An analysis of cursor positioning may provide guidelines for improvements in cursor control. Four experiments addressed efficiency of cursor control devices (Mouse, Digitising Pen, Accupoint, Trackball). Participants moved a cursor leftwards, upwards or rightwards, positioning it in large or small targets situated in near or far space on the computer screen. Cursor coordinates were sampled ever...

This thesis describes electrostatic actuation techniques and mechanical design features for realizing large planar analog vertical travel in an electrostatically actuated diffractive mid-infrared optical device, which is robust, both to manufacture, and against pull-in during use. This device, called the Polychromator, is fabricated by polysilicon surface-micromachining and consists of many par...