No abstract

This paper presents the results and the procedure for measuring the efficiency of a single-speed reduction gearbox developed for an autonomous electric utility vehicle. The resulting efficiency of the gearbox was investigated on three different driving cycles, which were selected because their speed profiles most closely matched the expected use of the autonomous vehicle. The required torque for each cycle was obtained from simulations of the vehicle’s driving behaviour including its predicted mass and dimensional parameters after a given driving cycle. The results of this research represent the achieved efficiency and average power loss of the gearbox on each driving cycle. The resulting gearbox efficiency was around 50 % in the predominant areas of driving cycles.

This paper presents an experimental analysis of the overall efficiency of the gearbox for an electric vehicle with a Dual Motor Drive System (DMDS) propulsion system. The efficiency was measured in the powertrain testbed where the gearbox was placed between two dynamometers. The main aim of the experiment was to get relevant values of an overall efficiency as a function of input speed and torque. All these measured values of the gearbox efficiency are included in graphs and efficiency maps. Tests were run with two different amounts of oil charge. The experiment confirmed the expected high values of the overall mechanical gearbox efficiency. The results can be used further for advanced simulations and other electric vehicle experiments.

No abstract

This paper presents a new platform for the development of an open control system for a robotic arm designed for the 3D printing of buildings. This platform uses a very efficient system of automatic code generation which greatly simplifies the process of robotic arm synthesis and analysis while allowing the deployment of custom control algorithms. An experimental workplace, with a reduced and simplified robotic arm, has been developed for the purpose of testing the platform. The mechanical and electrical construction of this experimental workplace is explained. The control system platform is also introduced and data from the test results are included. Both the advantages and disadvantages are discussed at the end.