Non-contact Microdynamic Tests and Inverse Dynamics Problems in Assessing the Level of Hidden Building Defects

2021 ◽  
pp. 823-831
Author(s):  
V. I. Sobolev ◽  
I. V. Sobolev ◽  
T. Ya. Druzhinina
Keyword(s):  
Inverse Dynamics ◽  
Dynamics Problems

Inverse dynamic analysis of milling machining robot, application in calibration of cutting force

2019 ◽  
Vol 57 (6) ◽  
pp. 773 ◽  
Author(s):  
Hai Ha Thanh
Keyword(s):  
Cutting Force ◽  
Cutting Forces ◽  
Inverse Dynamics ◽  
Milling Process ◽  
Machining Process ◽  
Empirical Formulas ◽  
Inverse Dynamic ◽  
Serial Manipulators ◽  
Machining Robot ◽  
Dynamics Problems

This article presents analysis of inverse dynamics of serial manipulators in milling process. Cutting forces and complicated motion involve to difficulties in solving dynamics problems of robots. In general, cutting forces are determined by using empirical formulas that lead to errors of cutting force values. Moreover, the cutting forces are changing and causing vibration during machining process. Errors of cutting force values affect to the accuracy of the dynamic model. This paper proposes an algorithm to compute the cutting forces based on the feedback values of the robot's motion.    

scholarly journals Mathematical simulation of the motion law of differential mortar pump piston intended for construction mix

2019 ◽  
Vol 1 (52) ◽  
pp. 13-20
Author(s):  
Bogdan Korobko ◽  
Serhii Zhyhylii ◽  
Anton Kivshyk
Keyword(s):  
Inverse Dynamics ◽  
Electric Energy ◽  
Working Process ◽  
Process Dynamics ◽  
Electromagnetic Action ◽  
Asynchronous Electric Drive ◽  
Energy Indices ◽  
Reliability Control ◽  
Dynamics Problems ◽  
The Mathematical Model

The paper is dedicated to the creation of a differential mortar pump with electromagnetic action for pumping finishingmaterial, which is not sensitive to electric energy gaps, and which is at the same time convenient, easy to use, reliable andeconomical in operation. The paper presents the mathematical model of the working process dynamics of a differentialmortar pump with electromagnetic action, which will allow to study common patterns of pumping processes in the pump inthe whole, to solve general problems on their calculation and design, to set and solve problems of reliability control,connected with high-frequency pressure oscillations, the problems of structural optimization and optimal design of all itselements. The control system of a pumping unit with vector controlled asynchronous electric drive is proposed on the basis ofthe concept of inverse dynamics problems in combination with the minimization of local functionality of instantaneousenergy magnitudes, which ensures high-quality pressure regulation under the conditions of parametric perturbations activityand has acceptable energy indices.

scholarly journals V-Function Method: Some Solutions of Direct and Inverse Dynamics Problems in A New Statement

2019 ◽  
Vol 56 (1) ◽  
pp. 70-81 ◽  
Author(s):  
Nail T. Valishin ◽  
Fan T. Valishin
Keyword(s):  
Harmonic Oscillator ◽  
Function Method ◽  
Wave Motion ◽  
Inverse Dynamics ◽  
Local Variation ◽  
Object Motion ◽  
Uniform Motion ◽  
Mechanical Analogy ◽  
Wave Nature ◽  
Dynamics Problems

Abstract Based on the V-function method, the properties of wave nature of object motion are studied for object uniform motion with constant speed and for harmonic oscillator. It follows from the V-function method that object wave motion is inseparably linked with its trajectory motion. The V-function method consists of the principle of local variation and a new statement of the direct and inverse dynamics problems. The proposed approach made it possible to make the optico-mechanical analogy that obtained a new continuation. A comparison is made with the results obtained by Schrödinger for a harmonic oscillator.

Dynamic Analysis and Simulation for Bionic Power-Assisted Legs of Hill Area Agricultural Machinery

2013 ◽  
Vol 675 ◽  
pp. 107-110
Author(s):  
Ke Dong Zhou ◽  
Jin Ge Wang ◽  
Jun Min Li ◽  
Jiang Mei Liao
Keyword(s):  
Dynamic Analysis ◽  
Intelligent Control ◽  
Driving Force ◽  
Design Principle ◽  
Inverse Dynamics ◽  
Hydraulic Cylinder ◽  
Structure Design ◽  
Agricultural Machinery ◽  
Hill Area ◽  
Dynamics Problems

According to a series of hill area issues, such as big steep gradients, small and disperse plots, agricultural machinery climbing restriction and so on, a new 2-DOF bionic power-assisted legs mechanism driven by hydraulic is proposed. This paper states the design principle of the bionic legs mechanism and its application in agricultural machinery. A dynamic model is used to show how the hind leg assisted agricultural machinery is established, and then deduce the dynamics equation, and solve the inverse dynamics problems. The result shows that agricultural machinery movement along slope is steady with the help of the hind leg, and driving force of hydraulic cylinder changes is slightly without any distinct impact to other devices, the actuated project is feasible and the structure design is reasonable, and it can be used to research on intelligent control of bionic legs and hill area agricultural machinery.

scholarly journals Synthesis of invariant circuit angular stabilization of unmanned aircraft at the pitch angle

2020 ◽  
pp. 14-20
Author(s):  
I. V. Rozhkov
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Pitch Angle ◽  
Pid Controller ◽  
Inverse Dynamics ◽  
Unmanned Aircraft ◽  
Synthesis Methods ◽  
Invariant System ◽  
Robust Controller ◽  
Aerial Vehicle ◽  
Dynamics Problems

The article considers the synthesis methods of an automatic invariant system of the pitch angle stabilization of an unmanned aerial vehicle that is based on the concept of inverse dynamics problems. The methods and results of simulation mathematical results of synthesized stabilization loop with using the Simulink of program MATLAB. The results of a comparative analysis of the dynamic characteristics of the contour of angular stabilization of an unmanned aerial vehicle by pitch angle with a PID-controller and a synthesized robust controller are presented.

scholarly journals A Novel Explicit Analytical Multibody Approach for the Analysis of Upper Limb Dynamics and Joint Reactions Calculation Considering Muscle Wrapping

2020 ◽  
Vol 10 (21) ◽  
pp. 7760
Author(s):  
Alessandro Ruggiero ◽  
Alessandro Sicilia
Keyword(s):  
Upper Limb ◽  
Inverse Dynamics ◽  
Driving Forces ◽  
Dynamical Analysis ◽  
Limb Dynamics ◽  
External Forces ◽  
Musculoskeletal Systems ◽  
Muscle Actuators ◽  
Dynamics Problems ◽  
The Hill

The aim of this paper is to present an explicit analytical biomechanical multibody procedure able to be implemented in the solution of the musculoskeletal systems inverse dynamics problems. The model is proposed in formal multibody analysis and implemented in the Matlab numerical environment. It is based on the constraint kinematical behaviour analysis and considers both linear muscle actuators and curved ones, by calculating the geodesic muscle path over wrapping surfaces fixed to the bodies. The model includes the Hill muscle approach in order to evaluate both the contractile elements’ actions and the passive ones. With the aim to have a first validation, the model was applied to the dynamical analysis of the “arm26” OpenSim model, an upper limb subjected to external forces of gravity and to known kinematics. The comparison of results shows interesting matching in terms of kinematical analysis, driving forces, muscles’ activations and joint reactions, proving the reliability of the proposed approach in all cases in which it is necessary to achieve in-silico explicit determinations of the upper limb dynamics and joint reactions (i.e., in joint tribological optimization).

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