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The presence of optical turbulence in video acquired by cameras viewing scenes at long distances can contribute significantly to degradation. This problem arises routinely, for example, in astronomy where objects of interest reside beyond the earth's atmosphere. Optical turbulence introduces time-varying perturbations in the images as well as blurring. In this paper, we introduce a method for suppressing...
The common industrial practice considers static analysis and design for distributed piping system while leaving the solution of problem arising from plant dynamic behaviour to designer experiences and/or to "ad-hoc" developed dynamic simulation models. In this paper, we describe a design methodology which can potentially increase performances, safety and shorten time to market development...
A smooth control Lyapunov function for the planar vertical takeoff and landing (PVTOL) aircraft is proposed. Its construction relies on the nonlinear stabilization technique called forwarding. The PVTOL aircraft model represents a particular example which illustrates well "Lyapunov forwarding" technique.
In this paper a Lyapunov control algorithm for a small scale autonomous model helicopter is obtained using robust backstepping techniques. The controller design does not consider the small body forces. The proposed controller is based on dynamic order reduction for the nonlinear dynamical model. Some simulation results are presented to illustrate the performance of such controller in the presence...
In this work, the principal algebraic, arithmetic and geometric properties of the CkSpline functions are presented. In this way Ckspline functions can be defined as the interpolating functions of the set of the all Taylor-Maclaurin expansion up to degree k defined at each point of discretization of the considered studying function. The case study in this article concerns a loading characteristics...
An inverse method is developed to recover for unknown stochastic inputs. The proposed approach relies on an approximate finite impulse response model of the system which is seen as a linearization around the current input estimation. The inversion itself is done within the frequency domain in order to lower the computation cost. This classical approach requires a regularization technique to be used...
This paper deals with a model-based approach to stabilize the engine speed around a defined value. The engine speed is modeled as a non-linear model containing explicitly the expression of the fuel conversion efficiency. Generally speaking, in literature, the modeling of this quantity obtained from experiments has two main expressions defined as polynomial or exponential forms. This paper focuses...
This article describes the development of a fast model predictive controller (MPC) for the air path of a diesel combustion engine. A basically fundamental model with a couple of measurement driven parts forms a nonlinear observer within an MPC. An online linearization algorithm allows a successive update of the linear model used for the prediction step and furthermore for the optimization to get the...
In this paper, a fully nonlinear aircraft dynamic model in the presence of wind is introduced. Assuming the wind vortex hypothesis, the equations of motion are formulated in a novel nonlinear control system form that is affine in control input for the chosen aircraft model. A sliding mode controller is subsequently developed where the position of the throttle is used to control the air velocity and...
This paper proposes a method for predicting aircraft flying qualities according to Cooper-Harper rating scale, where neural networks model is used to describe the nonlinear characteristics of pilot control based on experimental data. The relationship between the Cooper-Harper pilot rating and characteristics of a closed-loop aircraft-pilot system is investigated according to the parameters of pilot...
In order to study the influence of abilities of suppliers and different dimensions of reputation on civil aircraft brand capability, influence and performance, we took the domestic commercial enterprises as investigation object and conceptual model is established. Then, questionnaire survey was conducted to the civil aircraft manufacturing enterprise, using the statistical software SPSS13.0 and Lisrel...
This paper presents a complete and improved analytical subdomain model for predicting the magnetic field distributions in surface-mounted permanent magnet (PM) machines accounting for tooth-tips and slotting effect, during open-circuit, armature reaction and on-load conditions. The model analytical derivations and field solutions are extended to overcome the shortcoming in previous subdomain model,...
This paper describes the development of a sliding mode FTC scheme which is based on a LPV system representation. The scheme adopts a model reference framework for tracking capability, and control allocation for automatic control signal redistribution. The paper presents a formal stability analysis and also provides a synthesis framework for the proposed LPV controller. Simulation results based on...
This paper presents a modeling study of an electrical power source for more electric aircrafts. It was designed with a PI (proportional-integrator) automated control for dq currents of the electrical machine, using the non-linear model of it. Using the dimensionless linear model, it was designed an optimal control structure based on a quadratic quality criterion (LQR) to validate the theoretical results...
The paper presents the importance of the steam generator in the operation of power plants, stressing the importance of their management and automation to increase energy efficiency of each link in the chain. It presents mathematical model in absolute units from the air preheater. Modelling is based on physical model of the air preheater steam generator, simplifying assumptions adopted and the conservation...
Fire accidents are one of the major problems facing ship, ship fire specific gravity of shipwreck increases year by year. Toxicity and high-temperature of smoke produced in fire is responsible for most of the fatalities. In order to improve the technical level of emergency during ship fire, grope for methods to describe the spreading rule of ship fire and smoke, in this research a novelty simulation...
It will form a floating pool when LNG spilled on water or land. It may often be difficult to apply existing models or experimental data to specify the area of LNG pool. In this paper, the sensitivity of final consequence analysis results to the LNG pool area is examined. Under the condition of the same leak rate, the result shows that LNG vapor dispersion distance along the downwind reduces from 309m...
This panel will address the challenge of promoting dispositions towards and mastery of model-based reasoning and modeling practices. Free-body, circuit, and multi-unit process diagrams are fundamental engineering tools for transforming poorly articulated and ill-constrained problems into manageable, solvable problems. For engineers in industry or research, free-form sketches commonly inform back-of-the-envelope...
Fog is one of the most dangerous weather phenomena in driving scenarios that can benefit from driving assistance systems. For this reason we have developed an affordable advanced driving assistance solution that runs on Android based smart mobile platforms. Our system is able to detect the presence of fog in images captured from a moving vehicle, to estimate the fog's density, compute the visibility...
When designing the electrical installations of an industry that processes flammable products, it is necessary to know where the classified locations are. These locations are identified in drawings in order to orientate the specification of adequate electrical and electronic equipment. This paper will show why the figures' copy-and-paste practice does not guarantee a cost effective installation and...
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