Damian Derlukiewicz

The Operator Protective Structures Testing for Mining Machines

The study presents selected problems concerning the testing of protective structures for the mining machines in the field of passive safety. Such machines equipped with protective structures must meet the requirements of the relevant regulations and standards. Requirements of conducting experimental tests of protective structures: FOPS, ROPS and RSPS are specified. The paper provides the principles of development of computational models for numerical simulations by means of finite element method. A detailed example of comparison of experimental and simulation results for a protective structure is presented.

Proactive Failure Prevention by Human-Machine Interface in Remote-Controlled Demolition Robots

The objective of the paper is to design an advanced Humane Machine Interface implemented in remote-controlled robot for demolition works. The paper includes the use of Design Thinking methodology in the conceptual design process for determined user-machine problems. The experimental testing with high-speed camera and vibrometer were performed to obtain the input data for numerical analysis. Then the finite element method simulations were carried out to provide the assumptions for HMI solution. Finally, a novel arm-mounted HMI status/caution/warning lighting was designed and executed in the robot controller. The system notifies the operator about the load capacity and warns the operator about leading the arm in resonant frequency, which is a main cause of the reported robot’s arm fatigue failure.

Design Process Innovation of Mechanical Objects with the Use of Design for Six Sigma Methodology

According to the strategy of Total Quality Management (TQM) [7] effective quality assurance of mechanical objects is maintained by means of permanent monitoring processes carried out in the cycle of product formation. The quality assessment of processes and the optimization of their crucial elements are the necessary condition for the improvement of efficiency and achievement of high level of customer satisfaction [15]. So far most of the techniques used for the process improvement are adopted to Lean Six Sigma methodology [1, 2, 11, 12, 17]. Achieving the quality on the level of 6 sigma is a primary goal of applying this methodology. Opinions exist that Lean Six Sigma should be implemented in the large number of areas of the life, and its effects (essential improvement in financial results through the reduction of poor quality costs) are hard to overrate. High effectiveness of every single process that is possible to achieve by applying the Lean Six Sigma strategy, became a source of inspiration for the study of Design For Six Sigma (DFSS) [4, 8, 12, 13], with purpose to improve object quality by implementing the innovation in product development.

Design and Numerical Analysis of a Roof-Mounted Bicycle Carrier

The purpose of this paper is to present the design process and subsequent numerical analysis calculations of a new roof-mounted bicycle carrier for vehicles. The bicycle carrier is mounted on the vehicles longitudinal bars. The designed construction is subjected to both static and dynamic load sets to check if it meets the requirements of ISO 11154 norm – which specifies the minimum safety requests for roof load carrier intended for mounting on the roof of passengers cars and light commercial vehicles with a maximum authorized total mass up to 3,5t. To fulfil the specifications associated to safety, standards and traffic laws test four different software packages were used: CATIA V5 and NACA airfoil generator for designing, Cambridge Engineering Selector for choosing the most suitable materials and Abaqus CAE for Finite Element Analysis.

Conceptual Design of Means of Transport Harnessing Human Power

The article presents the conceptual design process on the example of the means of transport that use human muscle power. The article shows the sources of inspiration for designers and the results of the design process on the example of an interdisciplinary project “Creative Design”. The aim of the project was to generate the design concepts by developing the creativity skills. The studies described in the paper resulted in the design of the innovation mean of transport using human muscle power.

Diagnostic Models of the States of Developing Fault for Working Parts of the Excavator

The approach of designing a power transmission model (diagnoser) of the multi-bucket wheel excavator used in brown coal mining, presented in the study, helps prepare an effective method for identifying the states of developing fault. In order to develop such model/diagnoser it was necessary to measure the loads required for determination of the distribution function of the mining moment. Probabilistic methods were applied for establishing the state of initiating activities to protect against fault.

Identification of Internal Stresses in Bolted Flanged Joints

In bolted flange joints of flexible constructional elements, bolts are subjected not only to tension and torsion but also to bending loads. Identification of straining of each bolt is only possible by means of numerical methods e.g. the finite element method. In the case of large objects, the calculation problem is faithful projection of the phenomena occurring in direct zone of the contact of screw-nut pair. The application of global equivalent models of the whole joint is necessary in order to make it possible to precisely determine internal loads in individual bolts and then local models to establish stress fields necessary to assign durability. Calculation methodology based on the construction of two coherent models has been described: global - for the entire flange joint, and local - for a single bolt joint. The elaborated methodology was applied to evaluate a flange joint in a heat exchanger with rotating heating surfaces that was subject to damage. The causes of damage of the flange joint were determined.

Analysis of the Use of Biogas as Fuel for Internal Combustion Engines

The article presents the opportunity to power internal combustion engine by treated and non-purified biogas. Internal combustion engines may be operated only within a certain range of parameters of fuel due to the design and method of operation. Furthermore, they are sensitive to changes in chemical composition of the fuel. The aim of the work described in the studies was to test the quality of biogas that can be obtained by methane fermentation of the test material. Considering the treatment of biogas as a consumable in vehicles, its physicochemical properties can be very diverse. It is reasonable therefore to analysis biogas composition of samples from various biogas plants, in the context of the possibility of its use in a motor vehicle with an internal combustion engine. The article presents an analysis of the chemical composition of untreated biogas collected from five representative biogas plants. Then it summarizes the data received with the requirements of the standards referred to European countries and set out the possibility of direct use of untreated and untreated biogas during the operation of vehicles with combustion engines.

Study Optimization of the Design-Construction Process of the Design Element of the Electric Remote Control Demolition Machine Based on the Design Thinking Methodology

All the machines that are used in various sectors of the machine industry are usually the work of the team which consists of many specialized people. Generally the final effect is evaluated which is the physically produced machine that people can see, touch and use. In fact, no one realizes how much effort and work is needed to make the team successfully complete the design of the machine and start the long-awaited final stage which is the manufacturing. Each machine before the start of manufacturing passes through the stages of design and construction. It should be noted that these steps are one of the most important in the whole process of the manufacture of machinery.