the use of micro-controllers in actuators provides extended flexibility for on-line data acquisition and sophisticated control implementation. however, attempts to utilize the excellent features of induction motor that is deemed by its strength, robustness, high torque, and relatively low cost in actuators face a fundamental control design challenge. the purpose of this paper is to introduce th...

Modern control systems are very complex applications that pose special difficulties to systems designers. Design patterns are common in the field of automatic control but in most cases they are restricted to small subfields of application. In this paper we propose a pattern schema with two particular properties: i) it deals with some issues very relevant to control designers and ii) it is gener...

The paper describes the analysis, design and control of two new versions of spherical permanent magnet motor, which are capable of two and three degrees-of-freedom of controlled motion, and have a high specific torque capability. Their magnetic field distribution is established using an analytical technique formulated in spherical coordinates. This enables the torque vector and back-emf to be d...

Dynamic and evolving systems might require flexible access control mechanisms, in order to make sure that the unavailability of some users does not prevent the system to be functional, in particular for emergency-prone environments, such as healthcare, natural disaster response teams, or military systems. The auto-delegation mechanism, which combines the strengths of delegation systems and “bre...

The celebrated small-gain approach to robust control only makes use of the gain information of uncertainty. This results in a limitation on the achievable control bandwidth in system design. On the other hand, the alternative passivity approach has only limited applications. To relax the limitations associated with small-gain and passivity approaches, we explore the possibility of utilizing bot...

Firstly, a nonlinear control system based on the Riemannian manifold is defined from perspective of holism, and expression system's state equation in local coordinate given. The geometric structure discussed. influence systems studied. controllability observability Secondly, using properties involute distribution fully geodesic submanifolds, parts manifolds are Controllable structured decomposi...

This work studies an innovate working hydraulic system design for mobile applications, referred to as flow control. The fundamental difference compared to load sensing systems is that the pump is controlled based on the operator’s command signals rather than feedback signals from the loads. This control approach enables higher energy efficiency since the pressure difference between pump and loa...

A novel approach to the modeling and control of aerospace system design problems is presented. By integrating recent advances in probabilistic robust design and technology assessment methods with a traditional control system feedback architecture, the approach is intended to establish a unified structure for managing complex design problems under uncertainty. The notions of plant, state variabl...