In order to improve the market competitiveness of mobile phone manufacture companies in aspects of TQCS, based on the principle of virtual prototyping technology (VPT), a platform for developing the virtual prototype ...
详细信息
In order to improve the market competitiveness of mobile phone manufacture companies in aspects of TQCS, based on the principle of virtual prototyping technology (VPT), a platform for developing the virtual prototype of mobile phone is put forward in this paper. The function model and the architecture of the platform are also described in detail. The ideas and some key technologies for implementing the platform are discussed in this paper. Finally, the validity of the development platform is demonstrated with a design example.
This paper presents the design of a nonlinear rule based fuzzy logic controller for the nonlinear dynamic behavior of the probe tip of an atomic force microscope system (AFMs).At first,we use the bifurcation diagram t...
详细信息
This paper presents the design of a nonlinear rule based fuzzy logic controller for the nonlinear dynamic behavior of the probe tip of an atomic force microscope system (AFMs).At first,we use the bifurcation diagram to analysis the complex dynamic behavior of the atomic force microscope ***,the positive maximum Lyapunov exponent is obtained to identify that the chaotic motion do exist in *** order to suppress the undesired chaotic motion in AFMs,we address the design schemes of fuzzy logic controller to stabilize the slave chaotic AFMs to the master periodic *** the controller design process,it directly constructs the fuzzy rules subject to a common Lyapunov function such that the error dynamics of master and slave AFMs satisfy stability in the Lyapunov *** overcomes the trial-and-error tuning for the membership functions and rule base in traditional fuzzy logic ***,a numerical simulation is used to illustrate the effectiveness of the proposed controller.
A novel regression model, called fuzzy multiregression network, is presented in this paper. Our network can represent the interactive relationship among fuzzy linguistic attributes and provide an effective reasoning p...
详细信息
A novel regression model, called fuzzy multiregression network, is presented in this paper. Our network can represent the interactive relationship among fuzzy linguistic attributes and provide an effective reasoning procedure on prediction and decision making. Association among the predictive attributes in a network element is described by a nonadditive set function, while the causality between the predictive attributes and the objective attribute is determined by a user-defined fuzzy operator(s). A GA-based algorithm is developed for learning the regression coefficients in each network clement. The effectiveness and performance of the learning algorithm are investigated by series of experiments. A forward inference algorithm CMB-FKA is proposed to implement decision making and training data construction.
In this study, three types of gait generation methods in Quadruped walking are compared using simulation software such as ADAMS and Matlab/Simulink. Stability and straight path following performance of these three typ...
详细信息
ISBN:
(纸本)9781424424948;9781424424955
In this study, three types of gait generation methods in Quadruped walking are compared using simulation software such as ADAMS and Matlab/Simulink. Stability and straight path following performance of these three types is simulated and third type of gait generation method (Trotting) is found considerably well suited for practical point of view.
This paper addresses a general scheme of teleoperation system for a space free-flying robot. The system is comprised of five subsystems: the predictive simulation subsystem (PSS), the master-slave control subsystem (M...
详细信息
ISBN:
(纸本)9781424424948;9781424424955
This paper addresses a general scheme of teleoperation system for a space free-flying robot. The system is comprised of five subsystems: the predictive simulation subsystem (PSS), the master-slave control subsystem (MSCS), the task planning subsystem (TPS), the information processing subsystem (IPS) and the ground-based validation subsystem (GVS). All the subsystems are connected using the defined protocol and the system has many control mode of teleoperation. In the PSS, three levels of tele-programming is produced: planning level tele-programming, action level tele-programming and task level tele-programming, and they provide the flexible and powerful operating ability to complete tasks. Unilateral and bilateral master-slave control modes are provided in the MSCS. The model based PSS can solve the time delay problem by the prediction method. There are six types of information in the system are provided by the IPS which checks all the commands. Specially the GVS is included in the teleoperation system, which provides the operational object before the space robot launch and verifies the operations when the space robot is in orbit. Lastly, some experiments are designed for the system. It provides the guarantee for the development of the teleoperation system.
This paper presents a new Collision Avoidance (CA) Algorithm which uses Elastic Band Theory. Researchers tried to develop warning systems to avoid collisions which warn drivers of possible collision risk with audio an...
This paper presents a new Collision Avoidance (CA) Algorithm which uses Elastic Band Theory. Researchers tried to develop warning systems to avoid collisions which warn drivers of possible collision risk with audio and or visual signs. However, these systems are not sufficient for avoidance of a collision in situations where the driver gives no response to the warnings. CA System is a kind of Active Safety System which takes control of the vehicle for a couple of seconds and applies emergency maneuver when the collision is unavoidable through driver action alone. The proposed CA algorithm uses Elastic Band Theory which is an obstacle avoidance method used in robotics. This paper aims to introduce this theory applied with modifications to road vehicle based systems and presents realistic simulation results using high fidelity vehicle models with several different collision scenarios.
Hybrid flow shop scheduling problem (HFSP) is characterized as the scheduling of jobs in a flow shop environment where, at any stage, there may exist multiple machines. Besides the finishing time of the last job, ener...
详细信息
Hybrid flow shop scheduling problem (HFSP) is characterized as the scheduling of jobs in a flow shop environment where, at any stage, there may exist multiple machines. Besides the finishing time of the last job, energy consumption is another important factor affecting economy benefit of hybrid flow shop. A mixed-integer nonlinear programming model is established for the HFSP with minimizing the energy consumption, according to the characteristic of HFSP in practice. It is a typical NP-hard combinatorial optimization problem. For solving it efficiently, an improved genetic algorithm is presented. The fitness based on the ranking of the energy consumption of every individual and the self-adaptive mutation operation based on the fitness are adopted. The numerical experiment is carried out on the three-two-three HFSP, and the result indicates that the model is right and the improved algorithm is efficient.
Modern industries, e.g., semiconductor packaging, imposes increasingly stringent requirements on equipments with very high acceleration and high precision. Traditional design is approaching its physical limitations. T...
详细信息
Modern industries, e.g., semiconductor packaging, imposes increasingly stringent requirements on equipments with very high acceleration and high precision. Traditional design is approaching its physical limitations. The integrated design method is proposed as an preferable technique of the traditional one. In this paper, a general framework of the integrated design method is presented. The dynamic model for multi-link planar manipulators is derived by the finite element method. The PD control strategy is applied in the closed-loop system. The control parameters and structural parameters are optimized simultaneously by solving the integrated design problem. The controlled random search (CRS) technique, which is a simple and flexible global optimization technique, is used to solve the optimal design problem. A simulation shows the integrated design method gives improved system performances.
This paper discusses an extension of the MinMAC algorithm to aid sensor placement for modal tests. The extension is, essentially, a forward-backward combinational MinMAC algorithm. The original MinMAC algorithm propos...
详细信息
ISBN:
(纸本)9781605600666
This paper discusses an extension of the MinMAC algorithm to aid sensor placement for modal tests. The extension is, essentially, a forward-backward combinational MinMAC algorithm. The original MinMAC algorithm proposed by Carne can be regarded as a forward sequential MinMAC algorithm, which maximizes the discrimination between mode shapes of interest starting from a small intuition set. The proposed forward-backward combinational MinMAC algorithm aims to combine advantages of both forward addition and backward deletion MinMAC approaches. Moreover, the proposed algorithm is applied to the I-40 Bridge and the result is compared with that of the Effective Independence method. Furthermore, discussions of influencing sensor placement methods and their connections based on our resent results are presented, through which the insight of sensor placement problem is clearly interpreted. In particular, the physical significance and efficient computation of the Effective Independence method are introduced. Finally, comparison of sensor placement methods on a ladder structure and evaluation criteria are discussed.
暂无评论