Abstract: Cranes are used to move heavy cargo. While they are in general controlled by a human operator, automated systems are able to obtain more precise control. In this paper, we design a Takagi-Sugeno (TS) fuzzy controller for the crane. For this, first a TS fuzzy model of the crane is developed, and a TS observer is used to estimate the unmeasurable states. The observer is tested in simula...

The present paper focuses on the Lagrange mechanics-based description of small oscillations of a spherical pendulum with a uniformly rotating suspension center. The analytical solution of the natural frequencies' problem has been derived for the case of uniform rotation of a crane boom. The payload paths have been found in the inertial reference frame fixed on earth and in the noninertial refer...

A novel approach to collision avoidance concerning unknown dynamic obstacles is presented for a material flow system using an overhead travelling crane. The task involves the tracking of a desired trajectory derived from a path planning module based on a global map containing all static obstacles. The crane has been upgraded with three ultrasonic sensors which detect dynamic obstacles on the de...

The combination of overloading and parametric polymorphism has received some attention in the functional programming community. The main approach has been that of Haskell type classes. An approach to the type-checking and semantics of parametric overloading is presented, based on using structured kinds to constrain type variables. Open kinds constrain type variables by sets of operations and ar...

The number of users supported in a DS-CDMA cellular system is typically less than spreading factor (N), and the system is said to be underloaded. Overloading is a technique to accommodate more number of users than the spreading factor N. In O/O overloading scheme, the first set is assigned to the N synchronous users and the second set is assigned to the additional synchronous users. An iterativ...

This article presents a type system based on the DamasMilner system [DM82], that supports overloading. Types of overloaded symbols are constrained polymorphic types. The work is related to Haskell type classes [Wad89,NP93,HHJW96], System O [OWW95] and other type systems with similar forms of constrained types [Kae88,Smi91,Jon94,DCO96]. Restrictions imposed in these systems with respect to overl...

cognitive deficits such as impairments in attention, memory, information processing and executive functioning can be found in some parkinson's disease (pd) patients. recent studies suggested that pd drivers generally performed poorer than their healthy age-matched controls with regards to their cognitive and motor abilities during the psychometric testing. according to michon’s model of ca...

Mechanical overloading of the spine is associated with low back pain and intervertebral disc (IVD) degeneration. How excessive loading elicits degenerative changes in the IVD is poorly understood. Comprehensive knowledge of the interaction between mechanical loading, cell responses and changes in the extracellular matrix of the disc is needed in order to successfully intervene in this process. ...

With multiprocessor systems, redundant scheduling is a technique that trades processing power for increased reliability through redundancy. One approach, called primary-backup task scheduling, is often used in real-time multiprocessor systems to guarantee the deadlines of tasks in site of faults. Briefly, it consists in scheduling a secondary task conditionally in such a way that the secondary ...