The drive train components and the machine control system significantly influence the fuel consumption of mobile machinery. The demonstrator vehicle “Green Wheel Loader” developed within the joint research project “TEAM” combines the most promising drive concepts currently available for mobile machines with an innovative operating strategy. The developed drive and control system proved its functionality and performance under realistic operation conditions in a gravel pit. Reference test showed 10 – 15 % fuel savings of the prototype vehicle compared to a state-of-the-art series machine.

The drive train components and the machine control system significantly influence the fuel consumption of mobile machinery. The demonstrator vehicle “Green Wheel Loader” developed within the joint research project “TEAM” combines the most promising drive concepts currently available for mobile machines with an innovative operating strategy. The developed drive and control system proved its functionality and performance under realistic operation conditions in a gravel pit. Reference test showed 10 – 15 % fuel savings of the prototype vehicle compared to a state-of-the-art series machine.

aus dem Text: 'The term „industry 4.0“ describes the transition from a classic value-added chain to dynamic value-added networks. It is driven by four main design principles:  interconnection of machines and humans  information transparency  technical assistance to support humans  decentralized decisions This approach and its connected technologies, like IoT or cloud computing, enhance in the context of industrial production further flexibility and an increase in productivity through growing self-organisation and interlocking with logistics and planning processes. Extensive activities can be recorded in this field.

Independent metering valve systems open up for more flexibility because of the ability to control meter in and meter out flow individually, thus enabling many possibilities to adapt the actuator s behaviour to the user´s needs without altering any hardware. Furthermore, with alternative flow modes significant energy savings are possible. In many applications like excavators smooth switching between flow modes is required, a demand the market does not provide a satisfying solution for yet. Here, an approach using a short circuit path for smooth switching has been developed. The control algorithm hands over the volume flow from one path to another continuously depending on the current actuator load. Due to the flexible software structure the developed control algorithm can be applied to a very broad variety of independent metering valve layouts. Simulation results are promising and currently the solution is undergoing test rig evaluation.

Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-06-21T18:17:08Z No. of bitstreams: 2 Dissertação - José Salviano Borges - 2016.pdf: 59885367 bytes, checksum: 3df4277939769ca93ed44eee88f1bf84 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Cláudia Bueno (claudiamoura18@gmail.com) on 2017-07-07T19:56:31Z (GMT) No. of bitstreams: 2 Dissertação - José Salviano Borges - 2016.pdf: 59885367 bytes, checksum: 3df4277939769ca93ed44eee88f1bf84 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-07-07T19:56:31Z (GMT). No. of bitstreams: 2 Dissertação - José Salviano Borges - 2016.pdf: 59885367 bytes, checksum: 3df4277939769ca93ed44eee88f1bf84 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016-03-09 / Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEG / To enlarge the active participation of individuals with disabilities in society, some mechanisms have been developed, such as crustches and wheelchairs. Wheelchairs are widely used, either temporarily or even permanently, allowing greater mobility and independence of the individual. However, the same is subject to the physical limitations of the wheels, requiring regular and hard grouynd to ensure bettermobility. Thus, some studies have suggested repacing the wheels on the legs, since the same part of the evolutionary process allows many terrestrial animals and viable movement to the wheels. The mechanisms with legs given the name of mobile machines. Among the most famous mobile machines are developed by the dutch phisicist Theo Jansen, called by Strandbeest. This study evaluates the repacement of the wheels of wheelchairs, for legs, trying to extend its use in less regular land. Also shown is the pattern of locomotion strcture developed by Jansen and the development of the Jansen similar structure using multiobjective optimizationmethods in order to ensure a new optimum configuration, and obtain a prototype proposed to be coupled in a conventional wheelchair. During the work it is proposed the method of wighted sumwith Pareto, this method related to onedimensionalyzation objectives. It also presents a brief comparison with two other methods –Weihted Sumand Pareto Ordination. / Para ampliar a participação ativa de indivíduos com deficiência na sociedade, alguns mecanismos foram desenvolvidos, como muletas e cadeiras de rodas. As cadeiras de rodas são bastante utilizadas, seja temporariamente ou até mesmo permanentemente, permitindo uma maior mobilidade e independência do indivíduo. Contudo, a mesma encontra-se sujeita às limitações físicas das rodas, necessitando de terrenos regulares e rígidos para garantir uma melhor locomoção. Assim, alguns estudos sugeriram a substituição das rodas por pernas, uma vez que as mesmas fazem parte do processo evolutivo demuitos animais terrestres e permite movimentos inviáveis para as rodas. Os mecanismos dotados de pernas receberam o nome de máquinas móveis. Dentre as máquinas móveis mais famosas encontram-se as desenvolvidas pelo físico holandês Theo Jansen, denominadas por Strandbeest. Este trabalho avalia a substituição das rodas das cadeiras de rodas por pernas, procurando ampliar a sua utilização em terrenos menos regulares. É apresentado também o modelo da estrutura de locomoção desenvolvida por Jansen, além do desenvolvimento de uma estrutura similar à de Jansen, utilizando métodos de otimização multiobjetivo com o intuito de se garantir uma nova configuração ótima, obtendo uma proposta de protótipo a ser acoplado em uma cadeira de rodas convencional. Durante o trabalho propõe-se o método da Soma Ponderada com Pareto, método este relacionado à unidimensionalização de objetivos. Apresenta-se também uma breve comparação com outros dois métodos - Soma Ponderada e Ordenação de Pareto.

A new primary torque control concept for hydrostatics mobile machines was introduced in 2018 [1]. The mentioned concept controls the pressure in a closed circuit by changing the angle of the hydraulic pump to achieve the desired pressure based on a feedback system. Thanks to this concept, a series of advantages are expected [2]. However, while working in a Y cycle, the primary torque controlled wheel loader has worse performance in efficiency compared to secondary controlled earthmover due to lack of recuperation ability. Alternatively, we use deep learning algorithms to improve machines’ regeneration performance. In this paper, we firstly make a potential analysis to show the benefit by utilizing the regeneration process, followed by proposing a series of CRDNNs, which combine CNN, RNN, and DNN, to precisely detect Y cycles. Compared to existing algorithms, the CRDNN with bidirectional LSTMs has the best accuracy, and the CRDNN with LSTMs has a comparable performance but much fewer training parameters. Based on our dataset including 119 truck loading cycles, our best neural network shows a 98.2 % test accuracy. Therefore, even with a simple regeneration process, our algorithm can improve the holistic efficiency of mobile machines up to 9% during Y cycle processes if primary torque concept is used.