Experimental Stiffness Analyses of a 3-DOF Parallel Kinematics Machine-Tool

2018 ◽  
Author(s):  
Bulat Enikeev ◽  
Oleg Akmaev ◽  
Rinat Kudoyarov
Keyword(s):  
Machine Tool ◽  
Parallel Kinematics

scholarly journals Enhancing PKM Accuracy by Separating Actuation and Measurement: A 3DOF Case Study

2010 ◽  
Vol 2 (3) ◽  
Author(s):  
David Corbel ◽  
Olivier Company ◽  
Sébastien Krut ◽  
François Pierrot
Keyword(s):  
Machine Tool ◽  
Parallel Machine ◽  
Measuring System ◽  
Parallel Kinematics ◽  
Machine Accuracy ◽  
Control Schemes ◽  
Measurement Concept ◽  
Parallel Machine Tool ◽  
Independent Measuring

This paper proposes an approach for enhancing parallel kinematics machine accuracy by separating actuation and measurement. We describe the interest of the separation actuation and measurement concept and define the sensor redundancy used for designing the measurement device. Then, we present the design of a parallel machine-tool prototype with an independent measuring system, MoM3, as well as the optimization of its measuring system. Lastly, we present the control schemes used on the prototype, and provide experimental results to show the efficiency of separation actuation and measurement applied to a machine-tool.

scholarly journals Piezoelectric control of a machine tool with parallel kinematics

2007 ◽  
Author(s):  
Christian Rudolf ◽  
Jörg Wauer ◽  
Christian Munzinger ◽  
Martin Weis
Keyword(s):  
Machine Tool ◽  
Parallel Kinematics ◽  
Piezoelectric Control

Active Vibration Control for a Machine Tool With Parallel Kinematics and Adaptronic Actuator

2009 ◽  
Vol 4 (3) ◽  
Author(s):  
Alexandra Ast ◽  
Peter Eberhard
Keyword(s):  
Machine Tool ◽  
Vibration Control ◽  
Position Control ◽  
Active Vibration Control ◽  
Linear Quadratic Regulator ◽  
Parallel Kinematics ◽  
Linear Quadratic ◽  
Control Approach ◽  
Authority Control ◽  
Active Vibration

The use of adaptronic components opens up interesting new possibilities for modern machine tools such as parallel kinematics. In this paper, two active vibration control concepts are designed for an adaptronic component of a parallel kinematic machine tool. The machine tool is modeled as a flexible multibody system model including a nonlinear flatness-based position control. Both the combination of a frequency shaped linear quadratic regulator with an active damping concept in a high authority control/low authority control approach and the H2 optimal control with gain scheduling show a high potential in the simulation to significantly increase the disturbance rejection or the tracking performance of the machine tool.

Sensitivity Analysis of an Overconstrained Parallel Structure Machine Tool, the Tripteor X7

2012 ◽  
Vol 162 ◽  
pp. 394-402 ◽  
Author(s):  
Helene Chanal ◽  
Flavien Paccot ◽  
Emmanuel Duc
Keyword(s):  
Sensitivity Analysis ◽  
Machine Tool ◽  
Geometrical Parameter ◽  
Machine Tools ◽  
Inverse Kinematics ◽  
Parallel Structure ◽  
Geometrical Parameters ◽  
Analytic Method ◽  
Parallel Kinematics ◽  
Geometrical Transformation

A main limitation of parallel kinematics machine tools (PKM) use for machining tasks is their accuracy low level mainly due to geometrical transformation errors. Indeed, such machine tools are geometrically controlled with an inverse kinematics model (IKM). For a large number of PKM, this IKM is defined with an analytic method and by introducing geometrical parameters. Thus, the influence of each geometrical parameter on the tool pose accuracy should be estimated via a sensitivity analysis. In the case of an overconstrained PKM, the IKM is generally computed with a numerical method. The sensitivity analysis leads to complex computation. The aim of this paper is to present a sensitivity analysis on the Tripteor X7, an overconstrained machine tool. This study is also a first step to define the geometrical identification method on this overconstrained mechanism.

scholarly journals Design and Properties of Octaslide Redundant Parallel Kinematics

10.14311/568 ◽  
2004 ◽  
Vol 44 (3) ◽  
Author(s):  
V. Bauma ◽  
M. Valášek ◽  
Z. Šika
Keyword(s):  
Mechanical Properties ◽  
Machine Tool ◽  
Conceptual Design ◽  
Design Process ◽  
Machine Tools ◽  
Design Methodology ◽  
Parallel Kinematics ◽  
Parallel Kinematics Machines ◽  
Redundantly Actuated ◽  
Five Axis

This paper describes the conceptual design process of OCTASLIDE redundant parallel kinematics for a machine tool. Redundantly actuated parallel kinematics is a recently developed new concept for machine tools. It enables all mechanical properties of machine tools to be improved several times simultaneously. This is particularly demonstrated on the design of the OCTASLIDE. This is a concept of a five-axis machine tool centre. The paper describes the critical initial design phases and the accessible mechanical properties. The design process has follow the newly developed design methodology for parallel kinematics machines.

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