Modeling power and energy consumption of dense matrix factorizations on multicore processors

2013 ◽  
Vol 26 (17) ◽  
pp. 2743-2757 ◽  
Author(s):  
Pedro Alonso ◽  
Manuel F. Dolz ◽  
Rafael Mayo ◽  
Enrique S. Quintana-Ortí
Keyword(s):  
Energy Consumption ◽  
Multicore Processors ◽  
Matrix Factorizations ◽  
Dense Matrix ◽  
Modeling Power ◽  
Power And Energy

Modeling power and energy of the task-parallel Cholesky factorization on multicore processors

2012 ◽  
Vol 29 (2) ◽  
pp. 105-112 ◽  
Author(s):  
Pedro Alonso ◽  
Manuel F. Dolz ◽  
Rafael Mayo ◽  
Enrique S. Quintana-Ortí
Keyword(s):  
Multicore Processors ◽  
Cholesky Factorization ◽  
Modeling Power ◽  
Task Parallel ◽  
Power And Energy

The effects of variable mechanical parameters on peak power and energy consumption of ankle-foot prostheses at different speeds

2018 ◽  
Vol 32 (23) ◽  
pp. 1229-1240 ◽  
Author(s):  
Dianbiao Dong ◽  
Bryan Convens ◽  
Yuanxi Sun ◽  
Wenjie Ge ◽  
Pierre Cherelle ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Peak Power ◽  
Mechanical Parameters ◽  
Power And Energy

Characteristics Analyses of Energy Consumption for Boom Closed Circuit of Hydraulic Excavators

2012 ◽  
Vol 170-173 ◽  
pp. 3491-3494
Author(s):  
Ming Dong Chen ◽  
Ding Xuan Zhao
Keyword(s):  
Energy Consumption ◽  
Mathematical Models ◽  
Operating Conditions ◽  
Closed Circuit ◽  
Load Drop ◽  
Hydraulic Pump ◽  
Full Load ◽  
Power Characteristics ◽  
Hydraulic Excavators ◽  
Power And Energy

The boom with closed circuit in Hydraulic Excavators, which is made up of motor, hydraulic pump and accumulator, was put forward based on analysis of the operating condition of ordinary hydraulic excavators and mathematical models of system were built. Power characteristics of main power elements were obtained under typical operating conditions, and then the energy consumption characteristics were analyzed. The results show that the installed power and energy consumption will be reduced using boom with closed circuit, and no-load drop and full load rise of boom are the worst operating conditions.

scholarly journals A New Method for the Calculation of Energy and Power Requirements of Bucket Wheel Excavators

2019 ◽  
Vol 10 (1) ◽  
pp. 15-20
Author(s):  
József András ◽  
József Kovács ◽  
Endre András ◽  
Ildikó Kertész ◽  
Ovidiu Bogdan Tomus
Keyword(s):  
Energy Consumption ◽  
Numerical Method ◽  
Horizontal Plane ◽  
Vertical Plane ◽  
New Method ◽  
Energy Requirements ◽  
Belt Conveyor ◽  
Analytical Formulas ◽  
Power And Energy ◽  
Continuous Working

Abstract The bucket wheel excavator (BWE) is a continuous working rock harvesting device which removes the rock by means of buckets armoured with teeth, mounted on the wheel and which transfers rock on a main hauling system (generally a belt conveyor). The wheel rotates in a vertical plane and swings in the horizontal plane and raised / descended in the vertical plane by a boom. In this paper we propose a graphical-numerical method in order to calculate the power and energy requirements of the main harvesting structure (the bucket wheel) of the BWE. This approach - based on virtual models of the main working units of bucket wheel excavators and their working processes - is more convenient than those based on analytical formulas and simplification hypotheses, and leads to improved operation, reduced energy consumption, increased productivity and optimal use of available actuating power.

scholarly journals Leveraging task-parallelism in message-passing dense matrix factorizations using SMPSs

2014 ◽  
Vol 40 (5-6) ◽  
pp. 113-128 ◽  
Author(s):  
Alberto F. Martín ◽  
Ruymán Reyes ◽  
Rosa M. Badia ◽  
Enrique S. Quintana-Ortí
Keyword(s):  
Message Passing ◽  
Matrix Factorizations ◽  
Task Parallelism ◽  
Dense Matrix

scholarly journals Preliminary Design of a Small Unmanned Battery Powered Tailsitter

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Bo Wang ◽  
Zhongxi Hou ◽  
Zhaowei Liu ◽  
Qingyang Chen ◽  
Xiongfeng Zhu
Keyword(s):  
Energy Consumption ◽  
Design Methodology ◽  
Design Space ◽  
Preliminary Design ◽  
Wing Loading ◽  
Detailed Design ◽  
Discharge Model ◽  
Battery Discharge ◽  
Power And Energy

This paper presents a preliminary design methodology for small unmanned battery powered tailsitters. Subsystem models, including takeoff weight, power and energy consumption models, and battery discharge model, were investigated, respectively. Feasible design space was given by simulation with mission and weight constraints, while the influences of wing loading and battery ratio were analyzed. Case study was carried out according to the design process, and the results were validated by previous designs. The design methodology can be used to determine key parameters and make necessary preparations for detailed design and vehicle realization of small battery powered tailsitters.

Design of Powered Ankle-Foot Prosthesis With Nonlinear Parallel Spring Mechanism

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Fei Gao ◽  
Yannan Liu ◽  
Wei-Hsin Liao
Keyword(s):  
Energy Consumption ◽  
Design Method ◽  
Mechanical Energy ◽  
Power Requirement ◽  
Human Ankle ◽  
Cam Profile ◽  
Quadratic Bézier Curve ◽  
Spring Mechanism ◽  
Power And Energy ◽  
And Control

In this paper, a powered ankle-foot prosthesis with nonlinear parallel spring mechanism is developed. The parallel spring mechanism is used for reducing the energy consumption and power requirement of the motor, at the same time simplifying control of the prosthesis. To achieve that goal, the parallel spring mechanism is implemented as a compact cam-spring mechanism that is designed to imitate human ankle dorsiflexion stiffness. The parallel spring mechanism can store the negative mechanical energy in controlled dorsiflexion (CD) phase and release it to assist the motor in propelling a human body forward in a push-off phase (PP). Consequently, the energy consumption and power requirements of the motor are both decreased. To obtain this desired behavior, a new design method is proposed for generating the cam profile. Unlike the existing design methods, the friction force is considered here. The cam profile is decomposed into several segments, and each segment is fitted by a quadratic Bezier curve. Experimental results show that the cam-spring mechanism can mimic the desired torque characteristics in the CD phase (a loading process) more precisely. Finally, the developed prosthesis is tested on a unilateral below-knee amputee. Results indicate that, with the assistance of the parallel spring mechanism, the motor is powered off and control is not needed in the CD phase. In addition, the peak power and energy consumption of the motor are decreased by approximately 37.5% and 34.6%, respectively.

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