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Bogdan Landowski

Abstract

The article presents a construction method and an example of a model of a technical object operation process as well as the main stochastic assumption which is a mathematical model of an object state changes. The model of the operation process was built using an analysis of the state space and operation-related events of the analyzed technical objects. An example of numerical simulation of the technical object state change process as a tool to be used to support the analysis of the considered process. Numerical simulation of the stochastic process being a model of a technical object state change process makes it possible to determine the process characteristics impossible to determine in an analytical way.

Open access

Bogdan Landowski

Abstract

The article presents a construction method and an example of a model of a technical object operation process as well as the main stochastic assumption which is a mathematical model of an object state changes. The model of the operation process was built using an analysis of the state space and operation-related events of the analyzed technical objects. An example of numerical simulation of the technical object state change process as a tool to be used to support the analysis of the considered process. Numerical simulation of the stochastic process being a model of a technical object state change process makes it possible to determine the process characteristics impossible to determine in an analytical way.

Open access

Łukasz Muślewski, Bogdan Landowski, Maciej Woropay and Klaudiusz Migawa

Abstract

In this article, an analysis of modular truck application in the road transport in Poland has been made. Terminology has been unified. Classification and law regulations applicable in different European countries and all over the world have been discussed. An analysis of existing solutions has been made and an optimal variant for road freight transport, including the condition and parameters of the road infrastructure in Poland, has been proposed. The study presents initial conceptual assumptions of this project as well as advisability of using these modular trucks, on the basis of a selected research object – the analyzed transport company. On this example, an analysis of costs and potential profits to be generated from transport services performed using the proposed modular trucks and with reference to costs borne by the investigated company with the use of currently operated transport means, has been made.

Open access

Klaudiusz Migawa, Andrzej Neubauer, Łukasz Muślewski and Bogdan Landowski

Abstract

The paper presents the description of algorithm for calculation characteristics of simulation model for the operation and maintenance process of transport means. The model presented in the paper constitutes an integral element of the developed complex method of quality control in elaborate technical object performance systems. In the example presented in the paper, the evaluation criteria consist of the availability of technical object as well as unit profit generated in the states of the modeled operation and maintenance process. On the basis of the results of research carried out at an existing operation and maintenance system, entry data for the model were obtained and simulation experiments were carried out.

Open access

Łukasz Muślewski, Michał Pająk, Bogdan Landowski and Bogdan Żół Żółtowski

Abstract

Ship large-power steam boiler may serve as an example of complex critical technical system. A basis for rational control of operation of such system is knowledge on its capability of fulfilling the tasks to which it was intended. In order to make it possible to apply computer aiding to operational decision-making the capability should be described analytically. In this paper it was proposed to express the capability of ship steam boiler ( considered a complex system) to perform service tasks, by calculating components of its usability potential in a given instant t. To this end , was distinguished a set of steam boiler fundamental features which formulate space of its technical states. Values and characteristic intervals of the features were defined and this way sub-spaces of serviceability and non-serviceability states of the object in question were determined. Next, in the considered space, technical state of the boiler and its usability potential was determined. Owing to this it become possible to quantitatively express the steam boiler functioning capability which served as a basis for elaborating an algorithm for controlling the operational processes of a complex technical system under action. In this paper is also described a way of application of the presented method to calculation of ship steam boiler usability potential, which may be especially instrumental in the case of operational control of the boilers of the kind , equipped with interstage reheaters, i.e. those operating with high values of operational parameters.

Open access

Bogdan Landowski, Michał Pająk, Bogdan Żółtowski and Łukasz Muślewski

Abstract

This article deals with the modeling of the processes of operating both marine main and auxiliary engines. The paper presents a model of changes in operating conditions of ship’s internal combustion engine. The semi-Markov decision process was used to mathematically describe the process model of the engine. The developed model describes the effect of engine damage on the characteristics of its operation. A change in the input parameters of the model can simulate the influence of internal and external factors on the course of the analyzed process. A simplified calculation example is also presented for illustration purposes. The presented method together with developed algorithms and IT tools can be used to solve a wide range of problems related to the operation of marine main engines and other marine equipment as well as maritime and port facilities. This concerns primarily the economic, risk management and operational security issues of complex technical systems, as well as the readiness and reliability analysis of technical facilities.