Reno Filla - Academia.edu (original) (raw)
Papers by Reno Filla
2012 Federated Conference on Computer Science and Information Systems, 2012
ABSTRACT The consequences of tiredness, drowsiness, stress and lack of concentration caused by a ... more ABSTRACT The consequences of tiredness, drowsiness, stress and lack of concentration caused by a variety of different factors such as illness, sleep depletion, drugs and alcohol is a serious problem in traffic and when operating industrial equipment. This is especially important for professional drivers since both expensive equipment and lives may be at stake, e.g. in mining, construction and personal transportation, reduced concentration, stress or tiredness are known to be the cause of many accidents. A system which recognizes the state of the driver and e.g. suggests breaks when stress level is too high or driver is too tired would enable large savings and reduces accident. Today different sensors enable clinician to determine a driver’s status with high accuracy. The aim of the paper is to develop an intelligent system that can monitor drivers’ stress depending on psychological and behavioral conditions/status using heart rate variability. An experienced clinician is able to diagnose a person&rsquo
In order to further optimize the fuel efficiency and productivity of construction equipment, 3 ma... more In order to further optimize the fuel efficiency and productivity of construction equipment, 3 main potentials have been identified: • job site optimization • machine use optimization • machine optimization The focus of this paper is the machine optimization on the example of a wheel loader. Optimizing losses in individual components must be done, but it will not be a game changer for fuel efficiency improvement. Three areas for promising improvement potentials: • Optimizing the systems interactions • Decoupling of systems • Reduction of losses One example is shown for a total machine optimization approach: the "Reverse by Braking" function is using the machine operating brakes to slow down the machine during power shuttle instead of using the engine power. Decoupling of systems requires continuously variable transmission (CVT) functionality for the driveline. This can be achieved with hydraulic or electric CVTs. Two examples for decoupling systems are shown: the Volvo hyd...
Proceedings from the 13th Scandinavian International Conference on Fluid Power, June 3-5, 2013, Linköping, Sweden, 2013
In this study of eighteen wheel loader operators, test-driving a machine in three different tract... more In this study of eighteen wheel loader operators, test-driving a machine in three different traction force settings, we examine if a workload index derived from psychophysiological measurements of heart rate, finger temperature, skin conductance, respiration rate and end-tidal CO 2 -concentration in exhaled air can be easily used to assess operator workload in sufficient detail to use it as a complement to traditional subjective evaluations in machine testing, either of real machines or in a human-in-the-loop simulator. In a longer perspective, such measurements are expected to play a role in a workload-adaptive operator assistance system. However, the findings do not give support for this vision. Instead they indicate that other types of measurements than what have been used in our study should be employed if ease of use for practitioners such as test engineers is in focus, but also that other factors than just machine operability must be considered to have a great influence on the operator workload.
Proceedings from the 13th Scandinavian International Conference on Fluid Power, June 3-5, 2013, Linköping, Sweden, 2013
A study into alternative trajectories for wheel loaders working in short loading cycles has been ... more A study into alternative trajectories for wheel loaders working in short loading cycles has been conducted, examining other patterns than the traditional V-or Y-cycle. Depending on workplace setup and target function of the optimisation other trajectories can indeed prove beneficial. The results of this study can be used in operator models for offline simulations as well as for operator assistance or even in controllers for autonomous machines or energy management systems for non-conventional machines like hybrids.
Expert Systems with Applications, 2014
The main focus of this paper is to estimate the potential increase in fuel efficiency and product... more The main focus of this paper is to estimate the potential increase in fuel efficiency and productivity by means of an operator assistant system, in a wheel loader working in a bucket application in a production chain. This is done based on an empirical study. A line of argument is presented on how to go from the empirical study to theoretical optimal control of a wheel loader. A suggestion of the human-machine-interaction is also presented. Fuel efficiency (ton/l) increases of 20-40% and productivity (ton/h) increases of 40-80 % are expected.
The consequences of tiredness, drowsiness, stress and lack of concentration caused by a variety o... more The consequences of tiredness, drowsiness, stress and lack of concentration caused by a variety of different factors such as illness, sleep depletion, drugs and alcohol is a serious problem in traffic and when operating industrial equipment. A system that recognizes the state of the driver and e.g. suggests breaks when stress level is too high or driver is too tired would enable large savings and reduces accident. So, the aim of the project is to develop an intelligent system that can monitor drivers' stress depending on psychological and behavioral conditions/status using Heart Rate Variability (HRV). Here, we have proposed a solution using Case-Based Reasoning (CBR) to diagnose individual driver's level of stress. The system also considers feedback from the driver's on how well the test was performed. The validation of the approach is based on close collaboration with experts and measurements from 18 drivers from Volvo Construction Equipment (Volvo CE) are used as reference.
In this paper we study how automatic bucket filling can be realised in wheel loaders. Based on ob... more In this paper we study how automatic bucket filling can be realised in wheel loaders. Based on observations of how experienced operators use their machines in bucket applications, four algorithms for parametric generation of bucket trajectories are investigated. The algorithms have been developed and tuned using a simplistic static integration-based approach. The Discrete Element Method is used to validate the predictive capability of the aforementioned algorithms. Results and limitations of the simplistic approach in comparison to the numerical results, as well as specific simulation-related challenges and findings are reported and discussed.
2012 Federated Conference on Computer Science and Information Systems, 2012
ABSTRACT The consequences of tiredness, drowsiness, stress and lack of concentration caused by a ... more ABSTRACT The consequences of tiredness, drowsiness, stress and lack of concentration caused by a variety of different factors such as illness, sleep depletion, drugs and alcohol is a serious problem in traffic and when operating industrial equipment. This is especially important for professional drivers since both expensive equipment and lives may be at stake, e.g. in mining, construction and personal transportation, reduced concentration, stress or tiredness are known to be the cause of many accidents. A system which recognizes the state of the driver and e.g. suggests breaks when stress level is too high or driver is too tired would enable large savings and reduces accident. Today different sensors enable clinician to determine a driver’s status with high accuracy. The aim of the paper is to develop an intelligent system that can monitor drivers’ stress depending on psychological and behavioral conditions/status using heart rate variability. An experienced clinician is able to diagnose a person&rsquo
In order to further optimize the fuel efficiency and productivity of construction equipment, 3 ma... more In order to further optimize the fuel efficiency and productivity of construction equipment, 3 main potentials have been identified: • job site optimization • machine use optimization • machine optimization The focus of this paper is the machine optimization on the example of a wheel loader. Optimizing losses in individual components must be done, but it will not be a game changer for fuel efficiency improvement. Three areas for promising improvement potentials: • Optimizing the systems interactions • Decoupling of systems • Reduction of losses One example is shown for a total machine optimization approach: the "Reverse by Braking" function is using the machine operating brakes to slow down the machine during power shuttle instead of using the engine power. Decoupling of systems requires continuously variable transmission (CVT) functionality for the driveline. This can be achieved with hydraulic or electric CVTs. Two examples for decoupling systems are shown: the Volvo hyd...
Proceedings from the 13th Scandinavian International Conference on Fluid Power, June 3-5, 2013, Linköping, Sweden, 2013
In this study of eighteen wheel loader operators, test-driving a machine in three different tract... more In this study of eighteen wheel loader operators, test-driving a machine in three different traction force settings, we examine if a workload index derived from psychophysiological measurements of heart rate, finger temperature, skin conductance, respiration rate and end-tidal CO 2 -concentration in exhaled air can be easily used to assess operator workload in sufficient detail to use it as a complement to traditional subjective evaluations in machine testing, either of real machines or in a human-in-the-loop simulator. In a longer perspective, such measurements are expected to play a role in a workload-adaptive operator assistance system. However, the findings do not give support for this vision. Instead they indicate that other types of measurements than what have been used in our study should be employed if ease of use for practitioners such as test engineers is in focus, but also that other factors than just machine operability must be considered to have a great influence on the operator workload.
Proceedings from the 13th Scandinavian International Conference on Fluid Power, June 3-5, 2013, Linköping, Sweden, 2013
A study into alternative trajectories for wheel loaders working in short loading cycles has been ... more A study into alternative trajectories for wheel loaders working in short loading cycles has been conducted, examining other patterns than the traditional V-or Y-cycle. Depending on workplace setup and target function of the optimisation other trajectories can indeed prove beneficial. The results of this study can be used in operator models for offline simulations as well as for operator assistance or even in controllers for autonomous machines or energy management systems for non-conventional machines like hybrids.
Expert Systems with Applications, 2014
The main focus of this paper is to estimate the potential increase in fuel efficiency and product... more The main focus of this paper is to estimate the potential increase in fuel efficiency and productivity by means of an operator assistant system, in a wheel loader working in a bucket application in a production chain. This is done based on an empirical study. A line of argument is presented on how to go from the empirical study to theoretical optimal control of a wheel loader. A suggestion of the human-machine-interaction is also presented. Fuel efficiency (ton/l) increases of 20-40% and productivity (ton/h) increases of 40-80 % are expected.
The consequences of tiredness, drowsiness, stress and lack of concentration caused by a variety o... more The consequences of tiredness, drowsiness, stress and lack of concentration caused by a variety of different factors such as illness, sleep depletion, drugs and alcohol is a serious problem in traffic and when operating industrial equipment. A system that recognizes the state of the driver and e.g. suggests breaks when stress level is too high or driver is too tired would enable large savings and reduces accident. So, the aim of the project is to develop an intelligent system that can monitor drivers' stress depending on psychological and behavioral conditions/status using Heart Rate Variability (HRV). Here, we have proposed a solution using Case-Based Reasoning (CBR) to diagnose individual driver's level of stress. The system also considers feedback from the driver's on how well the test was performed. The validation of the approach is based on close collaboration with experts and measurements from 18 drivers from Volvo Construction Equipment (Volvo CE) are used as reference.
In this paper we study how automatic bucket filling can be realised in wheel loaders. Based on ob... more In this paper we study how automatic bucket filling can be realised in wheel loaders. Based on observations of how experienced operators use their machines in bucket applications, four algorithms for parametric generation of bucket trajectories are investigated. The algorithms have been developed and tuned using a simplistic static integration-based approach. The Discrete Element Method is used to validate the predictive capability of the aforementioned algorithms. Results and limitations of the simplistic approach in comparison to the numerical results, as well as specific simulation-related challenges and findings are reported and discussed.