The new idea of this paper is to make reversible an assembly line, i.e. to allow complete disassembly, by using a mobile platform equipped with robotic manipulator. The approach is a hybrid one in which the assembly/d...
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ISBN:
(纸本)9781467321273;9781467321259
The new idea of this paper is to make reversible an assembly line, i.e. to allow complete disassembly, by using a mobile platform equipped with robotic manipulator. The approach is a hybrid one in which the assembly/disassembly line is the discrete system whilst the wheeled mobile robot (WMR) together with the robotic manipulator (RM) is considered the continuous one. The mobile platform is used only in disassembling operations, in order to transport the components from the disassembling locations to the storage locations. Therefore, Synchronized Hybrid Petri Nets (SHPN) approach is used in modeling and control. This hybrid system takes into consideration the distribution of the necessary tasks to perform the hybrid disassembly of the components, using robot synchronization with flexible line process. The ultimate goal is to make completely reversible the assembly line. The SHPN model is transposed into LabView platform, thus getting a control structure of the mechatronic line and of WMR.
The increasing complexity of computer systems has led to the automation of administration functions, in the form of autonomic managers. One important aspect requiring such management is the issue of energy consumption...
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ISBN:
(纸本)9780769548623;9781467344326
The increasing complexity of computer systems has led to the automation of administration functions, in the form of autonomic managers. One important aspect requiring such management is the issue of energy consumption of computingsystems, in the perspective of green computing. As these managers address each a specific aspect, there is a need for using several managers to cover all the domains of administration. However, coordinating them is necessary for proper and effective global administration. Such coordination is a problem of synchronization and logical control of administration operations that can be applied by autonomous managers on the managed system at a given time in response to events observed on the state of this system. We therefore propose to investigate the use of reactive models with events and states, and discrete control techniques to solve this problem. In this paper, we illustrate this approach by integrating a controller obtained by synchronous programming, based on Discrete controller Synthesis, in an autonomic system administration infrastructure. The role of this controller is to orchestrate the execution of reconfiguration operations of all administration policies to satisfy properties of logical consistency. We apply this approach to coordinate three managers : two energy-aware ones, which control server provisioning and processor frequency, and a repair manager.
Co-simulation based on ADAMS and MATLAB software is introduced in this paper to study dynamic characters of one kind of water strider robot. control model, composed of DC servo motor model and hydrodynamic model, is b...
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ISBN:
(纸本)9781467317443
Co-simulation based on ADAMS and MATLAB software is introduced in this paper to study dynamic characters of one kind of water strider robot. control model, composed of DC servo motor model and hydrodynamic model, is built in MATLAB/Simulink software. Combined with mechanical model built in ADAMS software, electro-mechanical co-simulation model of whole water strider robot system is developed. Simulation results show that co-simulation platform is established successfully. Movements on water surface of water strider robot subjected to water resistance and motor driving force can be viewed clearly. Furthermore the platform can be used to study the influence of parameter variation on robot movement characters to achieve optimized robot.
With rapidly development of the devices and systems support for mobile computing, the embedded database management system becomes more and more important. This paper analyzes the characteristics, puts forward the syst...
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control software engineering has become a weighty factor according to implementation expense, especially when developing a new plant or migrating an existing one. Because of this, there are high customer demands conce...
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ISBN:
(纸本)9781467347372;9781467347358
control software engineering has become a weighty factor according to implementation expense, especially when developing a new plant or migrating an existing one. Because of this, there are high customer demands concerning safety and correctness of software. Conventional open-loop testing methods have clearly reached their limits as the complexity of today's control software is not manually manageable anymore. Nevertheless, they still belong to daily practice due to the lack of integrated solutions that do not overcharge users but that are tailored to software engineering demands. This contribution therfore approaches this problem and encourages the application of closed-loop modeling, validation, and verification methods. Beyond this, it proposes complete frameworks to apply this expertise not only in academia but in industrial environment as well.
The Internet of Things creates an environment where software systems are influenced and controlled by phenomena in the physical world. The goal is invisible and natural interactions with technology. However, if such s...
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ISBN:
(纸本)9780769548654;9781467351461
The Internet of Things creates an environment where software systems are influenced and controlled by phenomena in the physical world. The goal is invisible and natural interactions with technology. However, if such systems are to provide a high-quality personalised service to individuals, they must by necessity gather information about those individuals. This leads to potential privacy invasion. Using techniques from Information Flow control, data representing phenomena can be tagged with their privacy properties, allowing a trusted computing base to control access based on sensitivity and the system to reason about the flows of private data. For this to work well, tags must be assigned as soon as possible after phenomena are detected. Tagging within resource-constrained sensors raises worries that computing the tags may be too expensive and that useful tags are too large in relation to the data's size and the data's sensitivity. This paper assuages these worries, giving code templates for two small microcontrollers (PIC and AVR) that effect meaningful tagging.
There are many uncertainty factors when the electric vehicle (EV) drives in the complicated variable circumstance. It makes the control effect of some control modes non-ideal. To ensure the robustness of the closed-lo...
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ISBN:
(纸本)9781467318556;9781467318570
There are many uncertainty factors when the electric vehicle (EV) drives in the complicated variable circumstance. It makes the control effect of some control modes non-ideal. To ensure the robustness of the closed-loop system under the presence of uncertainties, such as parameter perturbation and unknown model dynamics, and to minimize the effect of disturbances, the mu synthesis robust control is introduced in this paper, and used in the EV driving controlsystem. The mu synthesis robust controller for driving of EV is designed, ensuring the robustness, performances-such as response speed and steady-state error -when there is perturbation of EV voltage of the battery and the driving mode. The experimental results with different voltage of batteries and driving modes show that the mu synthesis robust controllers are superior to the traditional Proportional Integration Differential (PID) controller for reducing steady-state tracking error and accelerating response rate.
This paper presents a rapid prototyping of real-time controllers for humanoid robotics based on standard off-the-shelf hardware and software. The proposed scheme allows control of a wide class of robotic systems in ha...
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ISBN:
(纸本)9781467321273;9781467321259
This paper presents a rapid prototyping of real-time controllers for humanoid robotics based on standard off-the-shelf hardware and software. The proposed scheme allows control of a wide class of robotic systems in hard real-time. To take advantage of Simulink graphic programming interfaces, robotic programming environment, middleware and library are also presented based on Matlab/Simulink/RTW toolchain. Experiments are presented to show the performance on current computing hardware.
The focus of this paper is the design and development of an automatic system for microassembly. The automatic processing is made possible by (i) the development of a machine vision algorithm to identify the targets an...
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ISBN:
(纸本)9781467318556;9781467318570
The focus of this paper is the design and development of an automatic system for microassembly. The automatic processing is made possible by (i) the development of a machine vision algorithm to identify the targets and end-effectors, (ii) an uncalibrated visual servoing algorithm to lead the end-effector to grasp the micro-pieces and then assemble the target. The experimental results demonstrate that this prototype microassembly system is effective and practicable for automatic microassembly applications.
Based on the introduction of components and principle of frequency modulation system of constant frequency AC power supply, math model of frequency modulation system is established. The simulation with parameters chan...
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ISBN:
(纸本)9780769547923
Based on the introduction of components and principle of frequency modulation system of constant frequency AC power supply, math model of frequency modulation system is established. The simulation with parameters changed under the state of middling rotate speed and middling load of the engine was discussed in details. The simulation results show that the change of system parameters would affect the dynamic and static characteristic of system.
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