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This paper presents an overview of the Central Pattern Generator (CPG) based control models as well as their applications to various multi-joint or multi-DOF robots. The motivation is to provide a relevant and practical guide to the existing literature for engineers with an interest in the emerging CPG-based biocybernetics approach. The CPGs function as a biological neural network with the great capability...
Modeling and simulation of multi-fingered robot hand (MFRH) is increasingly gaining importance amongst researchers for industrial and medical applications. In this paper, a MFRH with five fingers is modeled and simulated for grasping task. This was done using a CAD tool known as Solidworks, and an analytical tool known as SimMechanics of MATLAB. The simulation results show that the improved performance...
In this paper, modeling and control of spiral motor is proposed. The voltage equation and motion equation of the spiral motor is proposed. Based on this modeling, control system for the spiral motor is proposed. The proposed controller consists of three parts; the first part is PI current controller with back EMF compensation specialized for spiral motor, the second part is disturbance observer based...
High performance control of robotic systems, including the new generation of humanoid, assistive and entertainment robots, requires adequate knowledge of the dynamics of the system. This can be problematic in the presence of modeling uncertainties as the performance of classical, model-based controllers is highly dependant upon accurate knowledge of the system. In addition, future robotic systems...
This paper presents an experimental toolbox for modeling, design and simulation in robotics. “Experimental” is understood in the sense that the toolbox is based on an actor-oriented modeling and design environment, i.e., the Ptolemy II environment. Ptolemy II supports system development by a hierarchical refinement of possibly heterogeneous subsystems. Currently the toolbox provides basic features...
This paper presents both a quaternion based computed-torque trajectory tracking controller and a feed-forward trajectory tracking controller for a two-link space robot. First, the general form of the dynamical equations for a space robot modeled with quaternions is presented. The computed-torque controller is then presented and the stability of the resulting closed-loop system is analyzed via the...
Praca prezentuje syntezę modelu matematycznego przegubu miniaturowego, wieloczłonowego robota chirurgicznego nowej generacji, którego projekt powstał w ramach realizacji grantu MNiSzW 2376/B/T02/2010/38. Jego ramię składa się z 6 członów, o średnicy ok. 10 mm, napędzanych miniaturowymi silnikami elektrycznymi poprzez zespół przekładni planetarnych i ślimakowych, o łącznym przełożeniu powyżej 1/10000...
Today video games and animated movies and robotics involve individual and collective character behavior. To this end, behavior algorithms are studied to identify underlying principles of how information flows between the characters and research studies consider animal behavior. The prey-predator models could be based on simple attraction / repulsion. In this paper, we will primarily restrict to the...
This project is focusing on the development of robot-assisted stroke rehabilitation system of human upper limb and hand elbow movements. Realizing the complexity of human upper limb, the study is limited to human upper limb, consisting of 3 glenohumeral joints (abduction-adduction, flexion-extension, and rotation) and elbow joint (flexionextension). In this paper the rehabilitation robotic system...
Because of the high dimensional, non-linear, and hybrid features, humanoid push recovery is very difficult unlike animals and humans who are very adept on this. The topic is currently one of the exciting topics in robotics and existed research results have already provided significant methods to recover from push. However existed researches usually specify the range of the push magnitude which in...
This paper presents an output feedback PD-type controller for the trajectory tracking control of robotic manipulators. A linear observer is used to estimate the unknown velocity signals of the nonlinear manipulator. In the first part of this paper, we propose a PD-like output-feedback control law. The Lyapunov method is used to characterize the asymptotic property of all the signals in the closed-loop...
The paper suggests a new iterative feedback tuning (IFT)-based approach to the design of optimal state feedback control systems. Several signal processing aspects are analyzed to reduce the number of experiments in two control system structures. The presentation is focused on second-order positioning systems applied to manufacturing and robotics leading to an original IFT algorithm. Real-time results...
This paper presents the design and control of a Stewart-Platform. The Stewart platform is designed based on a set of six independently prismatic actuators. The actuators translate through spherical joints which reside on a stationary platform. Each strut is driven by a DC motor. In this paper, kinematic characteristic and its limitation are discussed. Simulations and experiments are conducted to evaluate...
The modeling and the control of flexible link robots have received a great deal of attention in the last decades due to the wide prospective industrial and space applications of ultra-light and high-speed mechanisms. This paper introduces a general and practical procedure for the design of effective control schemes for the position and vibration control of flexible links mechanisms. In particular,...
The biomechanical analysis done in this project is to assist the development of the robot assisted stroke rehabilitation system. Thus, the analysis of the upper limbpsilas motions focus on rehabilitation training for stroke survivor. As the human upper limb system is a natural biomechanical system, which can be modeled as links connected together by different joints with its own biological properties,...
A robot assisted hand stroke rehabilitation system is to be developed as this devastating disease have became one of the main reasons of the severe disabilities in the world. This project focuses on assisting the humanpsilas upper limb rehabilitation. The anatomy of the upper limb was first analyzed. Due to simplifications, the upper limb analysis was divided into two parts; the human arm which will...
This paper describes a procedure for obtaining the dynamical model of a space robot in a form that is useful for simulation. The differential equations of motion of the space robot are derived using a constrained Lagrangian approach to mechanics. Quaternions are utilized to model rotation which gives rise to generalized forces that are in the direction of the quaternion elements. A transformation...
The proposal of this paper is demonstrating the simplicity to develop a real control position action over a platform on mobile vehicle using two different discrete controllers. The mechanical structure is depicted and the range of work operation. The characterization is based on an accelerometer in the X axis. The mathematical analysis of these controllers, classic control discrete PID and the second...
An algorithm is presented for parameter estimation of a single-link robotic manipulator when there is dead-band between the duty-cycle of applied and actual PWM for the actuator and dead-zone (caused by backlash) in the torque transmission from actuator to the link. The proposed algorithm has two stages, in the first stage dead-band and one of the two system parameters is estimated using steady-state...
The inverted pendulum problem is well-known as a good application for control engineering. An autonomous robot can use the principle of the inverted pendulum for its design. A two-wheeled robot has both static and dynamic design considerations when using the inverted pendulum principle. This paper investigates the effect of varying mass characteristics on the step response of a self-balancing materials...
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