We present in this paper several ideas about the usability of the robotic arms and mobile robots as an assistive technology in a smart house where people with disabilities daily live. First, psychological and social a...
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ISBN:
(纸本)9789898111319
We present in this paper several ideas about the usability of the robotic arms and mobile robots as an assistive technology in a smart house where people with disabilities daily live. First, psychological and social aspects of smart home technology are presented and after that the modularity and standardization processes are discussed. Next we propose a smart house plan, equipped with a mobile robot which has a manipulator arm. This robotic system is used to help vulnerable persons, the handicapped men vehicle seat being equipped with a robotic arm which can manipulate objects by a hyper-redundant gripper. For the control of the processes in the smart house, we propose a hierarchical control system and for the mobile robot we use the artificial potential field method. Also, this paper points out the edutainment concept (EDUcation and enterTAINMENT) by robotics. Finally, some applications are presented.
This paper deals with the dynamic control of a parallel robot with C5 joints. Computed torque control and robust control have been studied and implemented. For this purpose, we have used the inverse dynamic model whos...
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ISBN:
(纸本)9789898111319
This paper deals with the dynamic control of a parallel robot with C5 joints. Computed torque control and robust control have been studied and implemented. For this purpose, we have used the inverse dynamic model whose parameters have been experimentally identified. The closed loop stability has been studied using the Lyapunov principle. The addition of a robustness term based on sliding mode technique ensures good tracking performances. The experimental results show the effectiveness of the robust control.
In the robotics field, a lot of attention is given to the complexity of the mechanics and particularly to the number of degrees of freedom. Also, the oscillatory recurrent neural network architecture is only considere...
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ISBN:
(纸本)9789898111319
In the robotics field, a lot of attention is given to the complexity of the mechanics and particularly to the number of degrees of freedom. Also, the oscillatory recurrent neural network architecture is only considered as a black box, which prevents from carefully studying the interesting features of the network's dynamics. In this paper we describe a generalized teacher forcing algorithm, and we build a default oscillatory recurrent neural network controller for a vehicle of one degree of freedom. We then build a feedback system as a constraint method for the joint. We show that with the default oscillatory controller the vehicle can however behave correctly, even in its transient time from standing to moving, and is robust to the oscillatory controller's own transient period and its initial conditions. We finally discuss how the default oscillator can be modified, thus reducing the local feedback adaptation amplitude.
In this paper, a near-optimum control strategy applied to a full car model equipped with an active suspension system is presented. The control law is based on a reduced order model obtained by means of a modal aggrega...
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ISBN:
(纸本)9789898111326
In this paper, a near-optimum control strategy applied to a full car model equipped with an active suspension system is presented. The control law is based on a reduced order model obtained by means of a modal aggregation method, achieving a compromise between computational effort in deriving the control law and system performances. To assess the controller performances, a virtual prototype of the suspension system is developed by using AMESim, an advanced fluid-mechanic developing tool. The virtual prototype could be assumed as a reliable model of the real system enabling to perform safer and cheaper tests than using the real system. Simulation results show the effectiveness of the approach.
The development of intelligent wheelchairs is a very good solution to assist severely handicapped people who are unable to operate classical electrical wheelchair by themselves in their daily activities. This paper de...
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ISBN:
(纸本)9789898111319
The development of intelligent wheelchairs is a very good solution to assist severely handicapped people who are unable to operate classical electrical wheelchair by themselves in their daily activities. This paper describes the integration of a robotic simulator with our intelligent wheelchair shared control and planning modules. An adapted version of the free Cyber-Mouse robotic simulator was used to simulate the movement of the intelligent wheelchair in a hospital environment. Adaptations of the subsumption architecture, Strips Planning and A* Algorithms were employed and integrated to allow wheelchair intelligent behavior. The experimental results have demonstrated the success of the integration of these algorithms in our simulator allowing very safe motion of the intelligent wheelchair in the simulated hospital environment. Also, the adapted Cyber-Mouse simulator proved its capability and robustness in simulating the hospital environment and wheelchair physic characteristics.
In this paper, a neural Pseudoderivative control (PDF) is applied to a nonlinear mathematical model of the Dinorwig pumped - storage hydroelectric power station. The response of the system with this auto-tuning contro...
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ISBN:
(纸本)9789898111302
In this paper, a neural Pseudoderivative control (PDF) is applied to a nonlinear mathematical model of the Dinorwig pumped - storage hydroelectric power station. The response of the system with this auto-tuning controller is compared with that of a classic controller, currently implemented on the system. The results show how the application of PDF control to a hydroelectric pumped-storage station improves the dynamic response of the power plant, even when multivariable effects are taken into account.
The paper deals with the best choice for the control sampling period in term of a multicriterial conditioning, with the on-line timing and with a comparison between the conventional (like PI) control algorithms and th...
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ISBN:
(纸本)9789898111326
The paper deals with the best choice for the control sampling period in term of a multicriterial conditioning, with the on-line timing and with a comparison between the conventional (like PI) control algorithms and the fuzzy control. Several useful relations are followed by diagrams obtained in simulation and by different real-time recordings both for the timing and for characteristic variables of the system. Implementations with microcontroller and DSP are used for analyzing the design criterion and the timing strategy. The application field concerns a servodrive, so the real-time constraints are quite strong. The author conceived a general control strategy for the on-line timing based on imbricate interrupts.. each pulse encoder acting on the hardware input interrupt of the control processor.
A new strategy for walking robots control in uncertain environments, called Stable States Transition Approach (SSTA), is proposed in this paper. All the controls, both the steps succession and the evolution inside eac...
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ISBN:
(纸本)9789898111319
A new strategy for walking robots control in uncertain environments, called Stable States Transition Approach (SSTA), is proposed in this paper. All the controls, both the steps succession and the evolution inside each step are established by the evolution environment and by the objective proposed during the evolution. There are no predetermined types of legs movements;they are on-line determined during the robot evolution, irrespective of the ground shape. To apply this strategy it was necessary the robot interpretation as a Variable Causality Dynamic Systems (VCDS). Experimental results are implemented and verified in RoPa, a platform for simulation and design of walking robot control algorithms, to demonstrate the efficacy of the proposed control method.
This paper deals with the control design for systems subject to constraints and affected by variable time-delay. The starting point is the construction of a predictive control law which guarantees the existence of a n...
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ISBN:
(纸本)9789898111326
This paper deals with the control design for systems subject to constraints and affected by variable time-delay. The starting point is the construction of a predictive control law which guarantees the existence of a nonempty robust positive invariant (RPI) set with respect to the closed loop dynamics. In a second stage, an iterative algorithm is proposed in order to obtain an approximation of the maximal robust positive invariant set. The problem can be treated in the framework of piecewise affine systems due to the explicit formulations of the control law obtained via multiparametric programming.
An efficient implementation of Model Predictive control (MPC) using a multilayer feed forward network as the plants linear model is presented. This paper presents a comparison between the Generalized Predictive Contro...
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ISBN:
(纸本)9789898111302
An efficient implementation of Model Predictive control (MPC) using a multilayer feed forward network as the plants linear model is presented. This paper presents a comparison between the Generalized Predictive control and Neural Generalized Predictive control with Newton-Raphson as minimization algorithm. Three different linear models are taken and their performances are tested. Simulation result shows the effect of neural network on Generalized Predictive control for linear systems. The performance comparison of these system configurations has been given in terms of ISE and IAE.
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