current innovative lateral load carrying systems for tall buildings are those in which the lateral drift is limited to an allowable value without considerable influence on economy. this aim is achieved by using special systems capable of using maximum stiffness and strength capacity of individual structural elements. an effective structural solution in this respect is the use of outrigger brace...

Abstract A discrete variable structure control methodology is presented to suppress vibration of high-speed flexible parallel robot. The elastic dynamic model of the flexible robot is built by using the finite element method and experimental modal testing. Considering uncertain external disturbances and measurement noise, and uncertain parameters of the system, we can utilize invariance of the ...

Indicators are used to quantify the pressure of pesticides on the environment. Pesticide risk indicators typically require weighting environmental exposure by a no effect concentration. An indicator based on spread equivalents (ΣSeq) is used in environmental policy in Flanders (Belgium). The pesticide risk for aquatic life is estimated by weighting active ingredient usage by the ratio of their ...

In this article, a simulation and evaluation of the mechanical stress exerted by wind on photovoltaic panels is performed. The stresses solar cells in PV module are calculated using finite element method, taking into account pressure allowable stresses, according to regulatory requirements. Seven different operating positions panel during its rotation from 0° 90° considered. each these position...

this paper presents a robust fractional order controller for flexible-joint electrically driven robots under imperfect transformation of control space. the proposed approach is free from manipulator dynamics, thus free from problems associated with torque control strategy in the design and implementation. as a result, the proposed controller is simple, fast response and superior to the torque c...

This paper presents a multi-link magnetic wheeled pipeline robot (PR-I), which is flexible and modular robotic mechanism. It designed for inspection, cleaning or disinfection of central air conditioning ventilation duct. PR-I can adapt to complex terrain, move in the ducts freely. A novel wheel proposed wall climbing, circumferentially embedded with rectangular permanent magnets. Firstly, climb...

The constraint effect is the key issue in structural integrity assessments based on two parameter fracture mechanics (TPFM) to make a precise prediction of the load-bearing capacity of cracked structural components. In this study, a constraint-based failure assessment diagram (FAD) was used to assess the fracture behavior of an Al 5083-O weldment with various flaws at cryogenic temperature. The...

For enhancing the efficiency of cantilever casting construction in a bridge, novel rhombus traveling track for hanging basket was developed and optimized. The business-oriented software called MIDAS applied to analyze mechanical properties with full load control load. strength distortion walking mechanism are within specified range when maximum beam unit internal force is 149.69 MPa, which less...

starting from two-dimensional (2d) equations of motion, discretized formulations for transient behavior of soil-structure interaction problems have been derived. two different dynamic infinite elements taking into account single and two-wave types are presented in transformed space. by coupling the infinite elements with standard finite elements, an ordinary finite element procedure is used for...

Optimal load of mobile robots, while carrying a load with predefined motion precision is an important consideration regarding their applications. In this paper a general formulation for finding maximum load carrying capacity of flexible joint mobile manipulators is presented. Meanwhile, overturning stability of the system and precision of the motion on the given end-effector trajectory are take...