Defining Torque Imagine pushing a door to open it. The force of your push causes the door to rotate about its hinges. How hard you need to push depends on the distance you are from the hinges and several other things that will be regarded as negligible. The closer you are to the hinges i.
Modelling torque converters essay a sustainable program of return missions to and from Mars in mind, the goal of said exploration is to efficiently prospect the terrain for water meant to be gathered and then utilized in the production of rocket fuel.
The rovers are tasked with relaying relevant data to a home base that is responsible for maintaining a mining schedule for an arbitrarily large group of rovers extracting water-rich regolith.
For this reason, it is crucial that the participants maintain a wireless connection with one another and with the base throughout the entire process. Technical Paper In avionics domain, currently most engineering efforts and costs come from integration, verification and validation activities.
Each error found on requirements during product verification or validation requires a full engineering cycle to manage the change: Hence, ensuring early and continuous validation of requirements in the engineering life cycle, becomes more and more crucial. The proposed approach relies on SysML models and is composed of modelling tasks to capture requirements and to structure functional interfaces and functions.
Technical Paper This paper relates to the design and development of a multi-modal UAV capable of aerial flight and underwater propulsion. A novel hybrid propulsion system has been manufactured and tested. Consisting of folding blades, the propeller has been optimized for propulsion both in air and water.
The critical water to air transition phase is achieved by an additional impulsive thruster powered by a C02 cartridge. To decrease the drag in underwater cruise and reduce the potential damage when the vehicle impacts the water, a morphing wing has been developed.
This consists of foam-carbon fiber lay-up constructed wings in a variable sweep configuration. The actuation of the sweep is achieved by linear servos mounted on the sleeve shaped spar. An integrated prototype is constructed, using an unconventional, anhedral horizontal stabilizers to allow clearance for the morphing wing.
Technical Paper A climate and altitude conditioning test bench was developed at the Institute of Energy Efficient Mobility IEEM of Karlsruhe University of Applied Sciences to evaluate the overall sustainability of using innovative biofuels in handheld power tools such as chainsaws, trimmers and blowers under any typical operating condition worldwide.
The 6 m3 hermetically sealed and thermally insulated test chamber is large enough to fit the entire power tool. Altitudes of up to m above sea level can be simulated using a throttle valve at the inlet of the chamber and a pressure-controlled rotary screw compressor positioned downstream the test chamber outlet.
Technical Paper During the past decade environmental and sustainability issues have become major problems to overcome since they have caused regional and global consequences. Exergy analysis is a potential tool to determine exergy destructions and losses and their true magnitudes and exact locations.
In this study some exergy based parameters such as: Technical Paper This paper proposes a new methodology to conduct thermal analysis in the conceptual phase of the aircraft development process.
Traditionally, thermal analysis is conducted after the system architecture has already been defined. The aircraft system thermal environment evaluation may lead to late design changes that can have a significant impact on the development process.
To reduce the risk of late design changes, thermal requirements need to be defined and validated in the conceptual design phase. This research paper introduces a novel multi-level modeling strategy based on a bottom-up approach.
It proposes an automatic geometrical simplification procedure for Computational Fluid Dynamic CFD analysis, a methodology for the generation of analytical correlations based on highly detailed methods, and a thermal risk assessment approach based on dimensionless numbers.
In such LCS, coolant pipes around the structure of the aircraft are used to supply water glycol based coolant to sink heat from power electronics and other heat loads in the electronic bay.
The extracted heat is then transferred to ram air through downstream heat exchangers.
The AACS consists of electrical blowers allocated to each heat load which subsequently drive the outflow cabin air through the heat sinks of the power electronics for heat extraction.
No additional heat exchanger is required after this stage in which the heated air is directly expelled overboard. Technical Paper The solid state power controller SSPC is one of the most important power electronic components of the aircraft electrical power distribution EPS systems.
This paper presents an architecture of the DC SSPC and provides the mitigation techniques for transient voltage overshoot during its turn-off.
The high source side inductance carries breaking current 9xnominal current just before turnoff and induces large voltage transient across the semiconductor devices. Three different transient voltage suppression TVS devices to reduce voltage stress across switches are included in the paper for detail study.
The comprehensive comparison of the TVS devices is presented.
In addition, the thermal impact of the TVS devices on the semiconductor switches is also analyzed.In the last two decades, an aerospace industry trend in the secondary power distribution concept has been dominated by power electronics technology which includes power converters and Power Control Modules based on Solid State Power Control (SSPC) switching elements.
Torque converters lag in their response to changing input torque. By default, Torque Converter includes no time lag in its response. You can include a response lag by specifying a time constant. Time lag simulation increases model fidelity but reduces simulation performance.
DC motors are widely used in field applications because of their many advantages over AC motors such as speed control, high starting torque, quick starting, stopping, reverse and acceleration and free from harmonics found in AC.
Likewise, the cost of torque converters will have to decline in the future. Space for the torque converter, especially in CVT- and front wheel drive applications, will be less than is currently available.
1 Math-based Torque Converter Modelling to Evaluate Damping Characteristics and Reverse Flow Mode Operation This paper presents math-based torque converter modelling and simulation in both.
The switched-reluctance motor is basic control system form of a torque-controlled drive as compared in performance to a D.C motor (separately-excited). Commonly, controlled speed or even position is the most requirements.