The canonical resolution of the multiplicity problem for U(3): An explicit and complete constructive solution

2008 ◽  
pp. 395-403 ◽  
Author(s):  
L. C. Biedenharn ◽  
M. A. Lohe ◽  
J. D. Louck
Keyword(s):  
Constructive Solution

Mechanical Design of a Bioinspired Compliant Robotic Wrist Rehabilitation Equipment

2021 ◽  
Vol 11 (3) ◽  
pp. 1246
Author(s):  
Ovidiu Filip ◽  
Andrea Deaconescu ◽  
Tudor Deaconescu
Keyword(s):  
Mechanical Design ◽  
Pneumatic Muscle ◽  
Social Reintegration ◽  
Constructive Solution ◽  
Fin Ray ◽  
Patient Pain ◽  
Passive Mobilization ◽  
Robotic Wrist ◽  
Compliant Actuator

Early social reintegration of patients with disabilities of the wrist is possible with the help of dedicated rehabilitation equipment. Using such equipment reduces the duration of recovery and reduces significantly rehabilitation costs. Based on these considerations the paper puts forward a novel constructive solution of rehabilitation equipment that ensures the simultaneous passive mobilization of the radiocarpal, metacarpophalangeal, and interphalangeal joints. The novelty of this equipment consists in the bioinspired concept of the hand support based on the Fin-Ray effect and in driving it by means of a pneumatic muscle, an inherently compliant actuator. The paper places an emphasis on the compliant character of the rehabilitation equipment that is responsible for its adaptability to the concrete conditions of patient pain tolerability.

EVALUATION OF THE TECHNICAL CONDITION OF THE FLAPE BEARING WITH ADJUSTABLE RIGIDITY

2020 ◽  
Vol 6 ◽  
pp. 101-105
Author(s):  
A.V. SYTIN ◽  
N.V. TOKMAKOV ◽  
A.V. GORIN ◽  
М.А. TOKMAKOVA
Keyword(s):  
Control System ◽  
Block Diagram ◽  
Technical Condition ◽  
Qualitative Assessment ◽  
Schematic Diagram ◽  
Constructive Solution ◽  
Experimental Stand ◽  
Bearing Stiffness ◽  
Stiffness Control

The article considered the assessment of the technical condition of a petal bearing with adjustable stiffness. A schematic diagram of bearing stiffness control is presented. Revealed a constructive solution providing rigidity adjustment. For a qualitative assessment of the technical condition, a petal bearing was modeled in the VATCAD environment. The schematic diagram and block diagram of the control system of the experimental stand for assessing the technical condition of the petal bearing are described. Recommendations are given for the further application of the concept of assessing the technical condition of petal bearings.

scholarly journals Optimization of Geometrical Parameters of Hollow-core Slabs by Formwork-free Shaping for Construction in Seismic Areas

2020 ◽  
Vol 8 (6) ◽  
pp. 4973-4977
Keyword(s):  
Cross Section ◽  
High Strength ◽  
Geometrical Parameters ◽  
Hollow Core ◽  
Constructive Solution ◽  
Industrial Buildings ◽  
Operational Load ◽  
Wide Range ◽  
Hollow Core Slab ◽  
The Cross

The building norms and standards of Uzbekistan on the reinforced concrete structures do not regulate the design of hollow-core slabs of formwork-free shaping, reinforced with prestressed wire reinforcement. The manufacturing technology of such slabs allows creating a wide range of products that increase the possibility of their use in various structural systems in residential, civil and industrial buildings, but in non-seismic areas only. The aim of this work is to develop a constructive solution for the cross section of a prestressed hollow-core floor slab of bench formwork-free shaping, reinforced with high-strength wire reinforcement, in order to create a wide range of products intended for construction in seismic areas. To achieve the goal, the problem of determining the optimal combination of height and configuration parameters of the cross section of such a slab is solved, meeting the normalized operational requirements and limitations of earthquake-resistant building standards. The main variable parameters are the height and the void degree of the section, characterized by the size and shape of voids. In calculating the cross-section of a hollow-core slab when substantiating the theoretical basis for the calculation, the cross section is reduced to the equivalent I-section. As a result of research, a constructive solution was developed for the slab cross section of the maximum parameter values (the span, operational load) set by the customer. The parameters of the slab cross-section are: the height 190 mm, the hollowness 38%, the height of the upper thickened flange (compared with the height of the lower flange) of the given section is 0.27h, the height of the lower flange is 0.17h, the reduced (total) thickness of all ribs “b” is 0.32 of the width of the upper flange. The voids in the section along the height of the slab are arranged asymmetrically. A patent for a utility model has been received for the proposed constructive solution of the slab cross section.

Aspects of Searching some Possibilities to Diminish the Processing Errors at Stamping Process

2015 ◽  
Vol 809-810 ◽  
pp. 295-300
Author(s):  
Sergiu Constantin Olaru ◽  
Gheorghe Nagîţ ◽  
Marius Ionuţ Ripanu ◽  
Vasile Manole
Keyword(s):  
Sheet Metal ◽  
Quality Standards ◽  
Portable Device ◽  
Experimental Measurements ◽  
Processing Industry ◽  
Constructive Solution ◽  
Stamping Process ◽  
Metal Sheets ◽  
Processing Errors

Processing errors in the process of stamping, represent some of the most important aspect that requires attention when you want to process parts with a simple configuration. Reducing errors increase the quality of stamped parts, therefore the processing industry of blanks from metal sheets attaches great importance to them. Given the international quality standards it is required to study in detail the problem of eliminating these errors. As a result the results of researches on the establishment of a special portable device to eliminate the clearance between the sheet metal and the guidance rulers of the material in die in order to reduce the deformations of the sheet metal trough successive actions dies. Are presented the proposed constructive solution, its advantages and experimental measurements at stamping with the use of the proposed solution.

Analysis of Equipment for Testing the Processability by Injection Molding of Plastics on the Basis of Axiomatic Design Principles

2019 ◽  
Vol 957 ◽  
pp. 437-444
Author(s):  
Adelina Hriţuc ◽  
Margareta Coteaţă ◽  
Oana Dodun ◽  
Gheorghe Nagîţ ◽  
Laurenţiu Slătineanu
Keyword(s):  
Injection Molding ◽  
Axiomatic Design ◽  
Design Principles ◽  
The Other ◽  
Manufacturing Processes ◽  
Functional Requirements ◽  
Constructive Solution ◽  
Other Hand ◽  
Design Activities

The obtaining of information concerning the processability by injection of plastics could facilitate a better design of injection manufacturing processes of parts made of such materials. With this aim in view, equipment for testing the processability by injection of plastics was designed. On the other hand, there are known the possibilities of using the axiomatic design principles to solve equipment or various design activities problems. Within this paper, an evaluation of the complying with the requests of the axiomatic design by the designed equipment was developed. The axiom of independence of the functional requirements necessary to be achieved by the equipment was applied. The analysis allowed the formulation of some remarks concerning the fulfillment of some principles of axiomatic design by the constructive solution proposed for the equipment for testing the processability by injection of plastics.

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