Michał Mańka | AGH University of Science and Technology (original) (raw)

Papers by Michał Mańka

Research paper thumbnail of Detailing of the underlying critical aspects

Research paper thumbnail of Integration into a vehicle/rider model for full-scale simulations

Research paper thumbnail of Investigation of accident scenarios and validation of the vehicle/rider model

Research paper thumbnail of Automatyczne wyważanie maszyn wirujących

Research paper thumbnail of Automatic balancing of rotating systems: control algorithm's implementation on FPGA systems

ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After dis... more ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After discussion of techniques’ principles, balancing mechanisms designed on ‘AGH’ University of Science and Technology are presented. After introduction into active balancing control algorithms, test results obtained during experiments are presented. The paper presents comparison between implementation process and results of experiments taken with two different control algorithms’ implementation platforms: dSPACE rapid prototyping system and ALTERA FPGA system. The paper ends with some conclusions about experiments and further works directions are presented.

Research paper thumbnail of Mechanisms for micro-and nano-systems

In the paper designing, structures and applications of micro-and nano-systems are presented. Afte... more In the paper designing, structures and applications of micro-and nano-systems are presented. After short introduction in fields of applications where presented systems are used authors discusses problems concerning motors and joints in MEMS. The most popular joint used in micro-system are based on flexures joints, which structure and examples are presented. Next two examples of micro-systems designed and built in

Research paper thumbnail of Sensing capabilities of the elastic interdigital transducer

Research paper thumbnail of Tunable Interdigital Transducer for Lamb Waves

In this paper a novel concept of a tunable transducer for exciting and sensing Lamb waves is pres... more In this paper a novel concept of a tunable transducer for exciting and sensing Lamb waves is presented. The proposed transducer is an extension of the Interdigital Transducer (IDT), which main advantage is mode selectivity. In the proposed transducer, further referred to as the Tunable IDT (T-IDT), comb electrodes with fixed pitch are replaced by a series of densely distributed discrete electrodes. They can be easily interconnected in different configurations to match required wavelength, which makes possible matching to different wavelengths without a need of physical changes of the electrodes layout. In order to verify the properties of the T-IDT, numerical simulations and experimental tests were performed and their results compared to the ones obtained with a traditional IDT. Both the numerical and experimental results show that the T-IDT generates beampatterns similar to those generated by the conventional IDT. The preliminary results presented in the paper prove that the proposed T-IDT can be easily tuned to various wave modes and show the performance similar to the one observed for the conventional IDT.

Research paper thumbnail of A “corner solver” for motorcycles as a tool for the development of a virtual rider

Vehicle Power and Propulsion …, 2009

... Leuven, Belgium david.morenoginer@lmsintl.com ... A naturalistic virtual rider is currently b... more ... Leuven, Belgium david.morenoginer@lmsintl.com ... A naturalistic virtual rider is currently being developed within the MYMOSA project (MRTN-CT-2006-035965), a research network financed by the Sixth Framework Program (Marie Curie Actions) of the European Union. ...

Research paper thumbnail of Validation and optimization of the leaf spring multibody numerical model

Archive of Applied Mechanics, 2015

In this paper, a multibody approach for leaf springs modelling that may be used for full vehicle ... more In this paper, a multibody approach for leaf springs modelling that may be used for full vehicle simulations is presented. Two different configurations of the leaf spring are investigated. The first one reproduces an actual mounting configuration of a leaf spring suspension in a vehicle, including the shackle. In the second configuration, the shackle is eliminated by mounting the leaf spring on linear bearings that are able to move on a guide rail. This allows for better spring rate evaluation, without the influence of shackle's length and position. Both configurations were modelled in commercially available software LMS Virtual.Lab Motion and tested experimentally. Results of investigations have proved that developed model correctly reproduces behaviour of the leaf spring for dynamic simulations, with better convergence achieved for configuration without shackle. Initial results for static tests have shown significant error in behaviour of the numerical model and experimental test rig. In order to minimize observed errors, the optimization process of the model parameters was performed in Noesis Optimus by means of single-objective optimization. It was proved that presented approach may be used for proper modelling of the leaf spring behaviour, and this type of models may be effectively used in full vehicle simulations.

Research paper thumbnail of Computer-Aided Prototyping of Interdigital Transducers for the Structural Health Monitoring of Planar Structures

Mechanics and Control, 2013

In recent years an intensive research activity into the application of guided waves (GWs) for str... more In recent years an intensive research activity into the application of guided waves (GWs) for structural health monitoring (SHM) can be observed. For instance, Lamb waves (LWs) have shown a great potential in monitoring of thin, planar structures. However, due to the dispersive and multimodal nature of the LWs, their snapshots can consist of many pulses even for an intact structure, which makes damage detection very complex. Moreover, small PZT transducers, most commonly used in SHM systems, act normally as omni-directional wave sources; therefore, dense or sparse transducers networks are required for damage localization. Some of the above-mentioned drawbacks of single PZT emitters and sensors can be overcome using interdigital transducers (IDT) designed to excite and sense a single, selected mode. The mode-tuning is performed by changing the span of fi nger electrodes to match the wavelength of the excited mode for the selected frequency. An IDT is a directional source, therefore, it generates a wave steered to the direction perpendicular to the electrodes. The width of the excited main lobe can be determined by the length of the electrodes. Since many parameters of the IDTs infl uence the LWs propagation, techniques for the simulation of the wave excitation and propagation are needed. In the paper, numerical tools for the computer aided design and virtual prototyping of the IDTs are presented. The simulation technique is based on the frequency-dependent transfer function of the structure, and due to its computational effi ciency it can be used for fast testing of IDTs' performance and for preliminary transducer design for further fi nite element simulations, and prototyping.

Research paper thumbnail of Piezocomposite Transducers for Guided Wavess

From Theory to Engineering Applications, 2013

Research paper thumbnail of Elastic Interdigital Transducers for Lamb Wave Generations

Solid State Phenomena, 2013

During recent years structural health monitoring (SHM) systems have gained growing attention. Wid... more During recent years structural health monitoring (SHM) systems have gained growing attention. Widely applied methods in SHM are methods based on the ultrasonic Lamb waves (LWs) which are also known as plate waves. LWs may be generated and sensed using different types of transducers and their selection is essential for the SHM systems performance. Among transducers used for generation and sensing of such waves, Interdigital Transducers (IDTs) are ones of the most promising types. Their main advantages are: mode selectivity, high excitation strength, wave directivity, small sizes and relatively low cost. In most cases IDTs are made of piezoceramics or piezoelectric polymers what makes them stiff and fragile. Contrary to the piezoceramic transducers, the ones based on piezocomposites (i.e.: macro-fiber composite) are flexible with the comparable efficiency of piezoelectric effects. The MFC transducers are usually optimized as actuators and they are not designed to any specific frequenc...

Research paper thumbnail of Lamb wave transducers made of piezoelectric macro-fiber composite

Structural Control and Health Monitoring, 2012

During recent years, an intensive research activity concerning the application of Lamb waves (LWs... more During recent years, an intensive research activity concerning the application of Lamb waves (LWs) for SHM has been observed. LWs may be generated and sensed using different types of transducers, and their selection is essential for the SHM system's performance. Results of the investigation of three types of transducers based on macro-fiber composite (MFC) are presented in this paper; two types of commercially available MFC actuators are compared with a novel type of custom-designed interdigital transducer also based on the MFC substrate. After a short presentation of the piezoelectric transducer designed for SHM applications, details concerning the proposed interdigital transducer design are provided. Beampatterns of the investigated transducers are first compared using numerical FEM simulations, and next, the numerically obtained beampatterns are verified experimentally using laser vibrometry. In the final part of this paper, advantages and disadvantages of the investigated transducers are discussed.

Research paper thumbnail of Review of the modular self reconfigurable robotic systems

2015 10th International Workshop on Robot Motion and Control (RoMoCo), 2015

Modular Self-Reconfigurable robot (MSR) is a system composed of a group, connected together ident... more Modular Self-Reconfigurable robot (MSR) is a system composed of a group, connected together identical modules, resulting structure can carry out specific, even complicated tasks. Such design allows for easy reconfiguration of the robot and its structure in order to continuously adapt it to the current needs or tasks, without the use of additional tools. Currently, the use of MSRs is very limited due to the early stage of technology development. In the future this type of robots will probably be widely used in industry and leisure activities. This paper describes the challenges and opportunities facing the modular robots, an explanation of key terms and the latest designs of artificial cell.

Research paper thumbnail of PZT based tunable Interdigital Transducer for Lamb waves based NDT and SHM

Mechanical Systems and Signal Processing, 2016

Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the ... more Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the Lamb waves is presented. The proposed transducer is developed based on a commonly applied Interdigital Transducer (IDT). In the proposed design, further referred to as the Tunable IDT (T-IDT), the conventional comb electrodes with fixed pitch are replaced by a series of densely distributed discrete electrode strips. These electrodes can be easily interconnected in different configurations to match the required wavelength without a need of applying physical changes to the electrode layout. In order to verify the properties of the T-IDT, numerical simulations and experimental tests were performed and their results were compared to the ones obtained for the IDT. The outcomes from both the numerical and experimental analyses proved that the beampatterns generated by the T-IDT are similar to those determined for the conventional transducer. Moreover, the changes in electrode connections lead to the changes of phase-amplitude characteristics.

Research paper thumbnail of PZT based tunable Interdigital Transducer for Lamb waves based NDT and SHM

Mechanical Systems and Signal Processing, 2016

Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the ... more Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the Lamb waves is presented. The proposed transducer is developed based on a commonly applied Interdigital Transducer (IDT). In the proposed design, further referred to as the Tunable IDT (T-IDT), the conventional comb electrodes with fixed pitch are replaced by a series of densely distributed discrete electrode strips. These electrodes can be easily interconnected in different configurations to match the required wavelength without a need of applying physical changes to the electrode layout. In order to verify the properties of the T-IDT, numerical simulations and experimental tests were performed and their results were compared to the ones obtained for the IDT. The outcomes from both the numerical and experimental analyses proved that the beampatterns generated by the T-IDT are similar to those determined for the conventional transducer. Moreover, the changes in electrode connections lead to the changes of phase-amplitude characteristics.

Research paper thumbnail of Design and simulations of interdigital transducers for Lamb-wave based SHM systems

Structural health monitoring systems have been constantly improved in the past decades. A complet... more Structural health monitoring systems have been constantly improved in the past decades. A complete system should consists of two main components: a network of sensors placed on monitored structure and a system of data analysis for its processing and interpretation. Sensors in a SHM system should be builtin to allow for continuous measurement in opposite to non destructive evaluation (NDE) methods where sensors are temporarily mounted on a structure only during measurements. One of the most promising type of the transducers dedicated for SHM systems are Interdigital Transducers (IDT) which are designed for ultrasonic Lamb wave monitoring. Mode selectivity, excitation strength, wave directivity, size and relatively low cost are the most important advantages of IDT. In presented paper after a short introduction of Lamb waves and SHM systems, the advantages and disadvantages of IDT are discussed. Next, the main aspects of designing a narrow band IDT are presented. As an example of the d...

Research paper thumbnail of Self balancing rotor design - simulation and experimental validation

Archives of Control Sciences, 2005

ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After dis... more ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After discussion of existing techniques the novel concepts of balancing mechanisms are presented. The proposed method are easy to apply to various rotating devices, with no need of machine construction modification. Next basics of active balancing control algorithms are presented, and designed detection and correction algorithms are discussed. After descriptions of mechanisms, measurement and control algorithms, simulation and experimental results are presented. The paper ends some conclusions about presented active balancing mechanisms and further works directions are presented.

Research paper thumbnail of The New Method of Automatic Balancing during Operation

Research paper thumbnail of Detailing of the underlying critical aspects

Research paper thumbnail of Integration into a vehicle/rider model for full-scale simulations

Research paper thumbnail of Investigation of accident scenarios and validation of the vehicle/rider model

Research paper thumbnail of Automatyczne wyważanie maszyn wirujących

Research paper thumbnail of Automatic balancing of rotating systems: control algorithm's implementation on FPGA systems

ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After dis... more ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After discussion of techniques’ principles, balancing mechanisms designed on ‘AGH’ University of Science and Technology are presented. After introduction into active balancing control algorithms, test results obtained during experiments are presented. The paper presents comparison between implementation process and results of experiments taken with two different control algorithms’ implementation platforms: dSPACE rapid prototyping system and ALTERA FPGA system. The paper ends with some conclusions about experiments and further works directions are presented.

Research paper thumbnail of Mechanisms for micro-and nano-systems

In the paper designing, structures and applications of micro-and nano-systems are presented. Afte... more In the paper designing, structures and applications of micro-and nano-systems are presented. After short introduction in fields of applications where presented systems are used authors discusses problems concerning motors and joints in MEMS. The most popular joint used in micro-system are based on flexures joints, which structure and examples are presented. Next two examples of micro-systems designed and built in

Research paper thumbnail of Sensing capabilities of the elastic interdigital transducer

Research paper thumbnail of Tunable Interdigital Transducer for Lamb Waves

In this paper a novel concept of a tunable transducer for exciting and sensing Lamb waves is pres... more In this paper a novel concept of a tunable transducer for exciting and sensing Lamb waves is presented. The proposed transducer is an extension of the Interdigital Transducer (IDT), which main advantage is mode selectivity. In the proposed transducer, further referred to as the Tunable IDT (T-IDT), comb electrodes with fixed pitch are replaced by a series of densely distributed discrete electrodes. They can be easily interconnected in different configurations to match required wavelength, which makes possible matching to different wavelengths without a need of physical changes of the electrodes layout. In order to verify the properties of the T-IDT, numerical simulations and experimental tests were performed and their results compared to the ones obtained with a traditional IDT. Both the numerical and experimental results show that the T-IDT generates beampatterns similar to those generated by the conventional IDT. The preliminary results presented in the paper prove that the proposed T-IDT can be easily tuned to various wave modes and show the performance similar to the one observed for the conventional IDT.

Research paper thumbnail of A “corner solver” for motorcycles as a tool for the development of a virtual rider

Vehicle Power and Propulsion …, 2009

... Leuven, Belgium david.morenoginer@lmsintl.com ... A naturalistic virtual rider is currently b... more ... Leuven, Belgium david.morenoginer@lmsintl.com ... A naturalistic virtual rider is currently being developed within the MYMOSA project (MRTN-CT-2006-035965), a research network financed by the Sixth Framework Program (Marie Curie Actions) of the European Union. ...

Research paper thumbnail of Validation and optimization of the leaf spring multibody numerical model

Archive of Applied Mechanics, 2015

In this paper, a multibody approach for leaf springs modelling that may be used for full vehicle ... more In this paper, a multibody approach for leaf springs modelling that may be used for full vehicle simulations is presented. Two different configurations of the leaf spring are investigated. The first one reproduces an actual mounting configuration of a leaf spring suspension in a vehicle, including the shackle. In the second configuration, the shackle is eliminated by mounting the leaf spring on linear bearings that are able to move on a guide rail. This allows for better spring rate evaluation, without the influence of shackle's length and position. Both configurations were modelled in commercially available software LMS Virtual.Lab Motion and tested experimentally. Results of investigations have proved that developed model correctly reproduces behaviour of the leaf spring for dynamic simulations, with better convergence achieved for configuration without shackle. Initial results for static tests have shown significant error in behaviour of the numerical model and experimental test rig. In order to minimize observed errors, the optimization process of the model parameters was performed in Noesis Optimus by means of single-objective optimization. It was proved that presented approach may be used for proper modelling of the leaf spring behaviour, and this type of models may be effectively used in full vehicle simulations.

Research paper thumbnail of Computer-Aided Prototyping of Interdigital Transducers for the Structural Health Monitoring of Planar Structures

Mechanics and Control, 2013

In recent years an intensive research activity into the application of guided waves (GWs) for str... more In recent years an intensive research activity into the application of guided waves (GWs) for structural health monitoring (SHM) can be observed. For instance, Lamb waves (LWs) have shown a great potential in monitoring of thin, planar structures. However, due to the dispersive and multimodal nature of the LWs, their snapshots can consist of many pulses even for an intact structure, which makes damage detection very complex. Moreover, small PZT transducers, most commonly used in SHM systems, act normally as omni-directional wave sources; therefore, dense or sparse transducers networks are required for damage localization. Some of the above-mentioned drawbacks of single PZT emitters and sensors can be overcome using interdigital transducers (IDT) designed to excite and sense a single, selected mode. The mode-tuning is performed by changing the span of fi nger electrodes to match the wavelength of the excited mode for the selected frequency. An IDT is a directional source, therefore, it generates a wave steered to the direction perpendicular to the electrodes. The width of the excited main lobe can be determined by the length of the electrodes. Since many parameters of the IDTs infl uence the LWs propagation, techniques for the simulation of the wave excitation and propagation are needed. In the paper, numerical tools for the computer aided design and virtual prototyping of the IDTs are presented. The simulation technique is based on the frequency-dependent transfer function of the structure, and due to its computational effi ciency it can be used for fast testing of IDTs' performance and for preliminary transducer design for further fi nite element simulations, and prototyping.

Research paper thumbnail of Piezocomposite Transducers for Guided Wavess

From Theory to Engineering Applications, 2013

Research paper thumbnail of Elastic Interdigital Transducers for Lamb Wave Generations

Solid State Phenomena, 2013

During recent years structural health monitoring (SHM) systems have gained growing attention. Wid... more During recent years structural health monitoring (SHM) systems have gained growing attention. Widely applied methods in SHM are methods based on the ultrasonic Lamb waves (LWs) which are also known as plate waves. LWs may be generated and sensed using different types of transducers and their selection is essential for the SHM systems performance. Among transducers used for generation and sensing of such waves, Interdigital Transducers (IDTs) are ones of the most promising types. Their main advantages are: mode selectivity, high excitation strength, wave directivity, small sizes and relatively low cost. In most cases IDTs are made of piezoceramics or piezoelectric polymers what makes them stiff and fragile. Contrary to the piezoceramic transducers, the ones based on piezocomposites (i.e.: macro-fiber composite) are flexible with the comparable efficiency of piezoelectric effects. The MFC transducers are usually optimized as actuators and they are not designed to any specific frequenc...

Research paper thumbnail of Lamb wave transducers made of piezoelectric macro-fiber composite

Structural Control and Health Monitoring, 2012

During recent years, an intensive research activity concerning the application of Lamb waves (LWs... more During recent years, an intensive research activity concerning the application of Lamb waves (LWs) for SHM has been observed. LWs may be generated and sensed using different types of transducers, and their selection is essential for the SHM system's performance. Results of the investigation of three types of transducers based on macro-fiber composite (MFC) are presented in this paper; two types of commercially available MFC actuators are compared with a novel type of custom-designed interdigital transducer also based on the MFC substrate. After a short presentation of the piezoelectric transducer designed for SHM applications, details concerning the proposed interdigital transducer design are provided. Beampatterns of the investigated transducers are first compared using numerical FEM simulations, and next, the numerically obtained beampatterns are verified experimentally using laser vibrometry. In the final part of this paper, advantages and disadvantages of the investigated transducers are discussed.

Research paper thumbnail of Review of the modular self reconfigurable robotic systems

2015 10th International Workshop on Robot Motion and Control (RoMoCo), 2015

Modular Self-Reconfigurable robot (MSR) is a system composed of a group, connected together ident... more Modular Self-Reconfigurable robot (MSR) is a system composed of a group, connected together identical modules, resulting structure can carry out specific, even complicated tasks. Such design allows for easy reconfiguration of the robot and its structure in order to continuously adapt it to the current needs or tasks, without the use of additional tools. Currently, the use of MSRs is very limited due to the early stage of technology development. In the future this type of robots will probably be widely used in industry and leisure activities. This paper describes the challenges and opportunities facing the modular robots, an explanation of key terms and the latest designs of artificial cell.

Research paper thumbnail of PZT based tunable Interdigital Transducer for Lamb waves based NDT and SHM

Mechanical Systems and Signal Processing, 2016

Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the ... more Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the Lamb waves is presented. The proposed transducer is developed based on a commonly applied Interdigital Transducer (IDT). In the proposed design, further referred to as the Tunable IDT (T-IDT), the conventional comb electrodes with fixed pitch are replaced by a series of densely distributed discrete electrode strips. These electrodes can be easily interconnected in different configurations to match the required wavelength without a need of applying physical changes to the electrode layout. In order to verify the properties of the T-IDT, numerical simulations and experimental tests were performed and their results were compared to the ones obtained for the IDT. The outcomes from both the numerical and experimental analyses proved that the beampatterns generated by the T-IDT are similar to those determined for the conventional transducer. Moreover, the changes in electrode connections lead to the changes of phase-amplitude characteristics.

Research paper thumbnail of PZT based tunable Interdigital Transducer for Lamb waves based NDT and SHM

Mechanical Systems and Signal Processing, 2016

Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the ... more Abstract In this paper a novel concept of a tunable transducer for generation and sensing of the Lamb waves is presented. The proposed transducer is developed based on a commonly applied Interdigital Transducer (IDT). In the proposed design, further referred to as the Tunable IDT (T-IDT), the conventional comb electrodes with fixed pitch are replaced by a series of densely distributed discrete electrode strips. These electrodes can be easily interconnected in different configurations to match the required wavelength without a need of applying physical changes to the electrode layout. In order to verify the properties of the T-IDT, numerical simulations and experimental tests were performed and their results were compared to the ones obtained for the IDT. The outcomes from both the numerical and experimental analyses proved that the beampatterns generated by the T-IDT are similar to those determined for the conventional transducer. Moreover, the changes in electrode connections lead to the changes of phase-amplitude characteristics.

Research paper thumbnail of Design and simulations of interdigital transducers for Lamb-wave based SHM systems

Structural health monitoring systems have been constantly improved in the past decades. A complet... more Structural health monitoring systems have been constantly improved in the past decades. A complete system should consists of two main components: a network of sensors placed on monitored structure and a system of data analysis for its processing and interpretation. Sensors in a SHM system should be builtin to allow for continuous measurement in opposite to non destructive evaluation (NDE) methods where sensors are temporarily mounted on a structure only during measurements. One of the most promising type of the transducers dedicated for SHM systems are Interdigital Transducers (IDT) which are designed for ultrasonic Lamb wave monitoring. Mode selectivity, excitation strength, wave directivity, size and relatively low cost are the most important advantages of IDT. In presented paper after a short introduction of Lamb waves and SHM systems, the advantages and disadvantages of IDT are discussed. Next, the main aspects of designing a narrow band IDT are presented. As an example of the d...

Research paper thumbnail of Self balancing rotor design - simulation and experimental validation

Archives of Control Sciences, 2005

ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After dis... more ABSTRACT The paper deals with automatic balancing of rotating systems during operation. After discussion of existing techniques the novel concepts of balancing mechanisms are presented. The proposed method are easy to apply to various rotating devices, with no need of machine construction modification. Next basics of active balancing control algorithms are presented, and designed detection and correction algorithms are discussed. After descriptions of mechanisms, measurement and control algorithms, simulation and experimental results are presented. The paper ends some conclusions about presented active balancing mechanisms and further works directions are presented.

Research paper thumbnail of The New Method of Automatic Balancing during Operation