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检索条件"主题词=Optimization function"

共 53 条记录，以下是21-30 订阅

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Using hand synergies as an optimality criterion for planning human-like motions for mechanical hands 14

Using hand synergies as an optimality criterion for planning...

引用

14th IEEE-RAS International Conference on Humanoid Robots (Humanoids)

作者： Rosell, Jan Suarez, Raul Univ Politecn Cataluna Barcelona Tech Inst Ind & Control Engn IOC Barcelona Spain

ISBN: (纸本)9781479971749

The use of anthropomorphic mechanical hands allows the execution of complex manipulation tasks and, therefore, its use is increasing, both in humanoid robots and mobile manipulators. The planning of the motions of these hands is not easy due to the high number of degrees of freedom (DOF) involved. Even when they may be mechanically independent, these degrees of freedom can be artificially coupled in order to mimic the human hand motions by using synergies, which in its turn results in a lower subspace where to perform the motion planning, as previously done by the authors using a PRM. This paper extends this idea by using an RRT*, that differently from other sampling-based planners, is an asymptotically optimal method. The optimization function selected evaluates the alignment of the path to the directions defined by the synergies, thus favoring human-like motions. The proposal is conceptually illustrated with a simple 2 DOF planar robot and applied to a 13 DOF mechanical hand.

关键词： dexterous manipulators humanoid robots mobile robots optimal control optimisation path planning 13 DOF anthropomorphic mechanical hands 2 DOF planar robot complex manipulation tasks hand synergies human-like motion planning mobile manipulators optimality criterion optimization function path alignment evaluation sampling-based planners Cost function Couplings Joints Planning Proposals Robots Humanoid robots Mobile manipulator Robot Cost functions Path planning Couplings Mobile robots Optimal control Joints Joints Hand DEPTH OF FIELD

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optimization of Grid Dynamic Resource Scheduling Algorithm Based on Response Time 11

Optimization of Grid Dynamic Resource Scheduling Algorithm B...

引用

11th International Conference on Measuring Technology and Mechatronics Automation (ICMTMA)

作者： Guo Wei-wei Liu Feng Wang Hui Heilongjiang Univ Technol Jixi 158100 Peoples R China

ISBN: (纸本)9781728121659

In order to improve the utilization of grid resources and the efficiency of task execution, this paper compares and analyzes the scheduling problems existing in genetic algorithm, Min-Min algorithm and hierarchical scheduling algorithm, and proposes a dynamic resource scheduling algorithm based on corresponding time. The parameters of resource change, weight coefficient and optimization function are introduced into the algorithm. Through the simulation experiment results, the scheduling algorithm proposed in this paper effectively improves the utilization of grid resources and the efficiency of task execution.

关键词： resource management task scheduling optimization function

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PID Controller Optimal Tuning 8

PID Controller Optimal Tuning

引用

8th International Conference on Electronics, Computers and Artificial Intelligence (ECAI)

作者： Doicin, Bogdan Popescu, Marian Patrascioiu, Cristian Petr Gas Univ Ploiesti Automat Control Comp & Elect Dept Ploiesti Romania

ISBN: (纸本)9781509020478

A controller is the most important part of an automatic control system. Its main purpose is to receive the signals from a transmitter and to compare it with a reference value. Depending on the error the controller sends a control signal to an actuator, so that the controlled variable to be equal with the reference value. The most used algorithm by a controller is the PID algorithm. In this paper, two methods of determining the optimum values of the tuning parameters for the PID controller will be presented, using case studies. The optimization criteria are the integral criteria, the square of the error between reference and controlled value being taken into consideration. The results consisted in the optimal values of the PID tuning parameters (gain and reset) for the analyzed cases associated to a temperature control system.

关键词： optimal tuning integral performance criteria PID controller optimization function

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An overall power flow algorithm to control the active power transfer at PCC in LV-distribution Network 19

An overall power flow algorithm to control the active power ...

引用

19th IEEE International Conference on Industrial Technologies (ICIT)

作者： Salem, Qusay Munoz, Octavio Xie, Jian Univ Ulm Inst Energy Convers & Storage Ulm Germany

ISBN: (纸本)9781509059492

Power flow analysis in power system networks has been widely investigated by several methods to determine the unknown variables at each bus in the system. Moreover, many optimization functions have been integrated with the power flow methods to control the operation of some parameters in the network. In this paper, an overall power flow algorithm is performed to control the active power flow at PCC. A series VSI is connected between the main grid and the microgrid, in which its injected voltage is provided by using an optimization function so as to inject the required voltage magnitude and phase angle. The optimized series voltage will increase or decrease the PCC voltage, which will in turn change the microgrid DGs voltage. So that, the active power of every DG will also be varied since the DG control unit is provided with P/V droop characteristic. The performance of the power flow algorithm in satisfying the assigned active power reference at PCC has been verified by several case scenarios.

关键词： Power flow algorithm optimization function Active power control P/V droop control Microgrid

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An extension of optimal fashion capsule wardrobe construction by considering visual dissimilarity and number of good coordinates 10

An extension of optimal fashion capsule wardrobe constructio...

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10th International Symposium on Computing and Networking (CANDAR)

作者： Tanaka, Yuta Ozaki, Tomonobu Nihon Univ Grad Sch Integrated Basic Sci Setagaya Ward 3-25-40 Sakurajosui Tokyo 1568550 Japan Nihon Univ Dept Informat Sci Setagaya Ward 3-25-40 Sakurajosui Tokyo 1568550 Japan

ISBN: (纸本)9781665475327

A capsule wardrobe (CW in short) is a minimal collection of interchangeable clothes from which a lot of diverse and attractive fashion coordination (combinations of clothes) can be obtained. CWs are created for the purpose of strategic brand developments, personal self-expression, and so on. Since a certain level of expertise is required, it is hard for fashion beginners to make CWs. In order to support for the creation of high-quality CWs, a method using an optimization technique has been developed, recently. In the method, fashion images are converted into certain vocabulary through image processing techniques, and a quasi-optimal CW is then derived by submodular optimization with respect to the compatibility and versatility which are calculated based on the LDA(Latent Dirichlet Allocation) topic model. However, the two metrics of compatibility and versatility are not always sufficient to meet the various demands of users. In this study, we extend the optimization function of the existing method by incorporating two factors of visual dissimilarity and number of good coordinates. By this extension, we can expect to realize a more flexible method for high-quality CW creation.

关键词： Fashion capsule wardrobe Submodular optimization optimization function

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Optimality and Stability of Cooperative Distributed Model Predictive Control in Large-scale Plant

Optimality and Stability of Cooperative Distributed Model Pr...

引用

IEEE Conference on Systems, Process and Control (ICSPC)

作者： Osman, Mohamed. A. M. Kamaruddin, Bashariah Ramasamy, M. Alneelain Univ Chem Engn Dept Khartoum Sudan Univ Teknol PETRONAS Chem Engn Dept Tronoh 32610 Perak Malaysia

ISBN: (纸本)9781538663271

This work presents a comparison between centralized and decentralized control for cooperative distributed model predictive control scheme for linear systems. The presented scheme compensates the lack of accuracy and computational efficiency of model based technique for the geographically distributed controllers. The advantages of this control strategy is the ability to converges to the centralized optimal solution (Pareto optimum) and generate a control feedback that able to insure the closed-loop stability. A process of two subsystems is presented for simplicity, however, the strategy has the flexibility to be extended for any finite number of subsystems.

关键词： Cooperative DMPC Distributed MPC Decentralized MPC optimization function Large-scale Plant

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Experimental optimization of Thickness of Protective Padding for Two-wheeler Rider's Helmet

Experimental Optimization of Thickness of Protective Padding...

引用

International Symposium on Engineering and Technology (ISET)

作者： Joshi, Atul A. Gore, Rahul G. Sundaram, Kalyan SRES Coll Engn Kopargaon India Trin Coll Engn Pune Maharashtra India Vishwakarma Inst Technol Pune Maharashtra India

ISBN: (纸本)9783038352006

Helmet protection to vulnerable two wheeler riders presents many challenges including those of weight, ergonomics appearance and convenience. Safety provided to a two wheeler riders head is mainly dependent on the level of shock getting propagated to the brain during the accident situations and therefore the design of the layer of shock absorbing padding assumes great importance. This padding, generally made of expanded polystyrene (EPS) or of state of art materials needs to be optimized. Helmets prototypes using an external hard shell made of Fiber Reinforced Plastic (FRP) were built to the different thicknesses and impact absorption tests on different types of test rigs were conducted

关键词： EPS Protective padding optimization function Helmet Impact absorption testing

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Mathematical model of the sintering process of iron-copper bearings

Mathematical model of the sintering process of iron-copper b...

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4th International Conference on Materials and Manufacturing Technologies (MATEHN 06)

作者： Teisanu, C. Gheorghe, S. Ciupitu, I. Univ Craiova Fac Mech Craiova Romania

ISBN: (纸本)9780878494606

The most important features of the self-lubricating bearings are the antifriction properties such as friction coefficient and wear resistence and some mechanical properties such as hardness, tensile strength and radial crushing strength. In order to improve these properties new antifriction materials based on iron-copper powders with several additional components (tin, lead and molybdenum disulphide) have been developed by PM techniques. To find the optimal relationship between chemical compositions, antifriction and mechanical properties, in this paper a mathematical model of the sintering process is developed, which high lighted the accordance of the model with data by regression analysis. For the statistical processing of the experimental data the VH5 hardness values of the studied materials were considered. The development of mathematical model includes the enunciation of the model, the establishment of the performance function (optimization) and the establishment of the model equations and verifying. The accordance of the model with experimental data has been highlighted by regression analysis.

关键词： mathematical modeling regression analysis optimization function active experiment self-lubricating bearings sintering process

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Increase of Energy Efficiency of Alumina Production on the Basis of Process Modeling

Increase of Energy Efficiency of Alumina Production on the B...

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International Conference on Mechanical Engineering, Automation and Control Systems (MEACS)

作者： Zaytseva, Natalya M. Natl Res Tomsk Polytech Univ Tomsk Russia

ISBN: (纸本)9781467381147

The article examines a problem of searching for new energy-efficient technological solutions in alumina production, which is characterized by nonlinearity, inertia and closedness. It suggests a method to solve this problem on the basis of modeling of the production process and development of the optimizing function based on production cost and obtaining values of the process variables.

关键词： energy efficiency modeling alumina production optimization function energy consumption energy saving technological decisions

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Model Predictive Control of Unmanned Mine Vehicle Trajectory Tracking 40

Model Predictive Control of Unmanned Mine Vehicle Trajectory...

引用

40th Chinese Control Conference (CCC)

作者： Xin, Peng Wang, Zhiwen Sun, Hongtao Zhang, Bin Lanzhou Univ Technol Sch Elect Engn & Informat Engn Lanzhou 730050 Peoples R China Lanzhou Univ Technol Key Lab Gansu Adv Control Ind Proc Lanzhou 730050 Peoples R China Lanzhou Univ Technol Natl Demonstrat Ctr Expt Elect & Control Engn Edu Lanzhou 730050 Peoples R China Qufu Normal Univ Coll Engn Rizhao 276826 Peoples R China

ISBN: (纸本)9789881563804

Unmanned mine vehicle driving technology is a significant part of smart mining research. This paper proposes a model predictive control strategy for the planning path trajectory tracking problem of unmanned mine vehicles during mining and transportation. Firstly, we construct an optimized function with soft constraints. Secondly, the terminal equation constraint is introduced to design model predictive control optimization problem, thereby transforming the trajectory tracking problem of the unmanned mine vehicle into the solution of the optimization problem. Then the unmanned mine vehicle trajectory tracking model predictive controller is designed, and the stability of the closed loop system through the Lyapunov stability theory is proved. Finally, a simulation example is used to verify that the terminal equation constraint model predictive controller proposed in this paper has a good tracking effect in the process of unmanned mine vehicle trajectory tracking. The control strategy proposed in this paper has improved the effect of unmanned mine vehicle planning path tracking, and its the following speed and stability are enhanced.

关键词： Unmanned Mine Vehicle Driving Technology optimization function Model Predictive Control Trajectory Tracking

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