The HYPSTAIR project concerns the design, verification and validation of components of a serial hybrid propulsion system for small aircraft testing platform. A serial hybrid aircraft concept currently represents the best efficiency versus range compromise in the light aviation segment. It can be considered as an electrically powered aircraft, with an on board generator used for extending the range when necessary. Limitations of current electric energy storage technology make an electric only propulsion system as yet unsuitable for long range flying, therefore an on board ICE generator provides a weight efficient, if somewhat less energy efficient, power generation solution. The project will involve conceptual design of the hybrid propulsion system components, namely the generator, motor, inverter, batteries and control unit. The components will be sized and designed by considering the performance and energy efficiency of the complete airframe propulsion system, and will be tested in a laboratory environment. A dedicated human machine interface will be designed that will allow simple operation of a complex hybrid system. Together with the reliability of electrical motors and the use of dual energy sources, safety of flying as provided by a system built upon these components will be improved. All components will be designed in a way that they will meet the relevant safety and certification standards. As there currently exist no regulations for aviation hybrid drive systems, defining these in collaboration with the authorities will be an important contribution of the project, paving the way for hybrid and electric technologies to be introduced to the market. These efforts will help create a competitive supply chain for hybrid drive components and reduce the time to market of such innovations.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 17749782The design of control concepts and algorithms for complex processes that are characterized more by the occurrence of discrete events than by differential equations representing the laws of physics is described. Such design is intended for process description in a symbolic, rather than numeric form. The goal is to combine concepts from both computer science and control, in order to develop a meaningful theory for controlling power electronics, process controllers, embedded systems and motion drive systems. Such design improves the firmware quality in a short development time. A designer would have only to specify the actions, events and transitions in terms of simple functions and tables. Generally, such design is highly structured and efficient, programming tasks are readily comprehended and fault diagnostics are easily included into the program structure. An application to the automatic sliding door illustrates the feasibility of this approach. The modular finite state machine, event–condition–action system, motion generation, motion control with load estimation and an example of a digital signal processor system is presented. The limitations and attributes of each technique are discussed, and a state table format is presented with the capability of representing parallel asynchronous sequential processes. The results were obtained from work with young researcher from industry and will be implemented in practical work.
F.06 Development of a new product
COBISS.SI-ID: 16519958The dissertation presents a control algorithm for scaled bilateral control that is designed in the virtual modal space and derived by using the sliding mode approach. This control algorithm ensures chattering free performance, robustness to the system disturbances and it allows easy implementation. Moreover, it allows scaled bilateral teleoperation that is necessary when the master device and the slave device are not the identical robot mechanisms. The control algorithm requires information of the master/slave positions and the external forces that act on the system. For position and velocity estimation the use of analog Hall sensors, which are nowadays already built into the motor housing, are proposed. Such sensors can provide sufficient position and velocity information. The algorithms for position and velocity estimation are presented. The robust control algorithm for bilateral teleoperation is implemented by the FPGA circuit. The FPGA circuits are known for its high computational power and parallel execution of the processes that allows achieving high control rates. This was already recognized as a necessity for high end control systems. This allows setting high cut off frequencies of the implemented filters. These filters are usually utilized to filter input signals, for speed measurement and in some cases also for external force estimation. High cut off frequency is required for high performance bilateral teleoperation. Hence, the FPGA circuit has rather limited hardware resources; logic circuit design may present a challenging task. Such design has to be carefully designed, especially for complex control systems; otherwise, the provided hardware resources might be insufficient. This thesis presents the design methodology, which allows the optimization of the hardware resources and the execution time of implemented processes. Moreover, such a design methodology allows a short design time. Performance of the proposed bilateral teleoperator, that includes analog Hall sensors and FPGA circuit, is experimentally examined. For this purpose, a simple experimental system was utilized. The experiments involve different scenarios (free motion, touching soft obstacles and touching hard obstacles) and different values of control parameters. The proposed bilateral teleoperator allows high-performance scaled bilateral teleoperation with high-haptic fidelity.
F.04 Increase of the technological level
COBISS.SI-ID: 269260288Based on the previously developed simulation of thyristor based converter the functional prototype of welding machine was built for company Varstroj Lendava, under the name VARMIG 600 T44 Synergy, which had a secondary control of the welding current through a three phase thyristor converter. The control was performed with a microprocessor that allows to store adequate technological base information for welding programs.
F.07 Improvements to an existing product
COBISS.SI-ID: 12321563This study presents the implementation of a hybrid control strategy that is applied to a brushless AC (BLAC) motor drive. Hybrid control is a general approach for control of switching based hybrid systems (HS). This class of HS includes a continuous process, controlled by a discrete controller with a finite number of states. The overall stability of the system is shown with the use of Lyapunov technique. The Lyapunov functions contain a term that penalises incremental energy of control error, torque and stator current, which enhances the stability. The closed loop system, with the proposed control law, provides good transient response and good regulation of the BLAC motor control. A new logical field programmable gate array current (torque) controller is developed, based on the Lyapunov theory. The reference tracking performance of speed and torque (current) is demonstrated in terms of transient characteristics through simulation and experimental results.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 15281430