Danny Echtermeyer, Steve Chroszielewski, W. Krause, G. Schneider, J. Brutscher, U. Müller, C. Krebs, F. Schäfer, D. Beckmann, U. Pliquett
The treatment (disintegration) of biogas substrates and fermentation media is carried out aiming in process optimization and thus increasing efficiency. Newly developed disintegration procedures are often tested on a laboratory scale or in single-line pilot plants to prove their effectiveness in a first test phase. Due to the constantly changing properties of biogas substrates, especially in the case of solid substrates, a parallel fermentation of treated and untreated substrate is recommended. In this way it is possible to assess the effectiveness of the newly developed disintegration method, even if the substrate quality changes over time. We present a concept in which two identically structured digester lines, each with a 200 L digester (D) and a second step digester (SD, 100 L), are operated in parallel in a pilot plant. The treatment takes place in one digester line (DD, SDD; D = disintegration) while in the second digester line (DB, SDB; B = blind, flow through) the substrate flows through a chamber of the same geometry but without treatment facilities.
{"title":"Untersuchung zur Desintegration von Gärmedien in einer parallel betriebenen Pilotbiogasanlage","authors":"Danny Echtermeyer, Steve Chroszielewski, W. Krause, G. Schneider, J. Brutscher, U. Müller, C. Krebs, F. Schäfer, D. Beckmann, U. Pliquett","doi":"10.15150/LT.2021.3270","DOIUrl":"https://doi.org/10.15150/LT.2021.3270","url":null,"abstract":"The treatment (disintegration) of biogas substrates and fermentation media is carried out aiming in process optimization and thus increasing efficiency. Newly developed disintegration procedures are often tested on a laboratory scale or in single-line pilot plants to prove their effectiveness in a first test phase. Due to the constantly changing properties of biogas substrates, especially in the case of solid substrates, a parallel fermentation of treated and untreated substrate is recommended. In this way it is possible to assess the effectiveness of the newly developed disintegration method, even if the substrate quality changes over time. We present a concept in which two identically structured digester lines, each with a 200 L digester (D) and a second step digester (SD, 100 L), are operated in parallel in a pilot plant. The treatment takes place in one digester line (DD, SDD; D = disintegration) while in the second digester line (DB, SDB; B = blind, flow through) the substrate flows through a chamber of the same geometry but without treatment facilities.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":"76 1","pages":"124-140"},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47829810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stefan Traub, Markus Birk, Bastian Volpert, M. Auer
This paper explains how predictive adaptation of an existing shift strategy can be implemented within the transmission control of agricultural machinery. An active sensor on the vehicle is used to accomplish this adjustment. A radar sensor from the automotive environment is attached to the vehicle, and appropriate algorithms for recognizing uphill gradient are implemented using raw radar data. The processing unit sends the results of the uphill gradient determination to transmission control, allowing the transmission ratio to be adjusted in advance to the terrain ahead. In this way it is guaranteed that the optimum transmission ratio is set for the respective uphill gradient even before the vehicle begins to ascend.
{"title":"Umsetzung einer prädiktiven Fahrstrategie durch radarbasierte Steigungserkennung in Traktoren","authors":"Stefan Traub, Markus Birk, Bastian Volpert, M. Auer","doi":"10.15150/LT.2021.3268","DOIUrl":"https://doi.org/10.15150/LT.2021.3268","url":null,"abstract":"This paper explains how predictive adaptation of an existing shift strategy can be implemented within the transmission control of agricultural machinery. An active sensor on the vehicle is used to accomplish this adjustment. A radar sensor from the automotive environment is attached to the vehicle, and appropriate algorithms for recognizing uphill gradient are implemented using raw radar data. The processing unit sends the results of the uphill gradient determination to transmission control, allowing the transmission ratio to be adjusted in advance to the terrain ahead. In this way it is guaranteed that the optimum transmission ratio is set for the respective uphill gradient even before the vehicle begins to ascend.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46643693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bastian Stürmer-Stephan, J. Morhard, H. Griepentrog
In Deutschland gibt es etwa 55.000 Fusballplatze, die unabhangig von der Witterung eine Nutzungsdauer von mind. 800 h/Jahr haben sollten. Der sandige Tragschichtaufbau eines normgerechten Rasenspielfeldes muss kunstlich bewassert werden. Dies fuhrt zu einem hohen Wasserverbrauch bei Trockenheit. Die Einarbeitung eines biologisch abbaubaren Nadelfilz, im Weiteren Vlies genannt, soll die Wasserverfugbarkeit fur die Rasennarbe verbessern und somit die Nutzungsdauer von Sportplatzen erhohen. Ziel der vorliegenden Untersuchung war die Entwicklung und Bewertung eines Gerats zum vertikalen Einbau eines 150 mm hohen Vlieses in bestehende Spielfelder. Die Einbautiefe betragt hierbei maximal 170 mm. Das Gerat schneidet die Grasnarbe auf, offnet einen Schlitz mithilfe eines Kastenschars und bringt das Vlies in den Tragschichtaufbau ein. Eine nachfolgende Andruckwalze ruckverdichtet anschliesend die Oberflache. Im durchgefuhrten Feldversuch wurde die Genauigkeit der Arbeitstiefe und die Ruckverdichtungsqualitat des Gerates bewertet, sowie die Auswirkungen auf die Rasennarbe beurteilt. Die Abweichung der Arbeitstiefe betrug weniger als 20 mm. Die Bodenruckverfestigung, gemessen als Eindringwiderstand entsprach dem Ausgangszustand, mit Ausnahme des Bereichs in der direkten Nahe des Vlieses. Die Verringerung der Narbendichte durch das Gerat betrug weniger als 15 %, so dass die Bespielbarkeit auch nach Einbau des Vlieses gewahrleistet war. Das entwickelte Gerat erfullte die Anforderungen. Um die Auswirkungen des Vlieseinbaus in Bezug auf den Wasserverbrauch und die Auswirkungen auf die Rasennarbe beurteilen zu konnen, mussen weitere Untersuchungen durchgefuhrt werden.
{"title":"Development and evaluation of a device to incorporate biodegradable textiles into sports turfs","authors":"Bastian Stürmer-Stephan, J. Morhard, H. Griepentrog","doi":"10.15150/LT.2021.3267","DOIUrl":"https://doi.org/10.15150/LT.2021.3267","url":null,"abstract":"In Deutschland gibt es etwa 55.000 Fusballplatze, die unabhangig von der Witterung eine Nutzungsdauer von mind. 800 h/Jahr haben sollten. Der sandige Tragschichtaufbau eines normgerechten Rasenspielfeldes muss kunstlich bewassert werden. Dies fuhrt zu einem hohen Wasserverbrauch bei Trockenheit. Die Einarbeitung eines biologisch abbaubaren Nadelfilz, im Weiteren Vlies genannt, soll die Wasserverfugbarkeit fur die Rasennarbe verbessern und somit die Nutzungsdauer von Sportplatzen erhohen. Ziel der vorliegenden Untersuchung war die Entwicklung und Bewertung eines Gerats zum vertikalen Einbau eines 150 mm hohen Vlieses in bestehende Spielfelder. Die Einbautiefe betragt hierbei maximal 170 mm. Das Gerat schneidet die Grasnarbe auf, offnet einen Schlitz mithilfe eines Kastenschars und bringt das Vlies in den Tragschichtaufbau ein. Eine nachfolgende Andruckwalze ruckverdichtet anschliesend die Oberflache. Im durchgefuhrten Feldversuch wurde die Genauigkeit der Arbeitstiefe und die Ruckverdichtungsqualitat des Gerates bewertet, sowie die Auswirkungen auf die Rasennarbe beurteilt. Die Abweichung der Arbeitstiefe betrug weniger als 20 mm. Die Bodenruckverfestigung, gemessen als Eindringwiderstand entsprach dem Ausgangszustand, mit Ausnahme des Bereichs in der direkten Nahe des Vlieses. Die Verringerung der Narbendichte durch das Gerat betrug weniger als 15 %, so dass die Bespielbarkeit auch nach Einbau des Vlieses gewahrleistet war. Das entwickelte Gerat erfullte die Anforderungen. Um die Auswirkungen des Vlieseinbaus in Bezug auf den Wasserverbrauch und die Auswirkungen auf die Rasennarbe beurteilen zu konnen, mussen weitere Untersuchungen durchgefuhrt werden.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42758155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
U. Roth, S. Wulf, Maximilian Fechter, Carsten Herbes, Johannes Dahlin
The processing of slurry and biogas digestate reduces their volume and separates nutrient flows, especially in regions with nutrient surpluses. This makes it possible to cut transport costs for supra-regional utilisation and to configure tailor-made products for different customers. However, the additional capital and equipment costs can usually only be compensated by revenue from the CHP bonus for the use of excess heat from combined heat and power systems in biogas plants, unless high prices can be achieved for the products outside agriculture. The use of heat also has a considerable impact on the greenhouse gas emissions associated with processing. If reference emissions are charged because the heat is no longer available to replace fossil resources, this far outweighs savings from transport. However, it is not possible to draw general conclusions due to the diverse plant-specific conditions (amount and type of nutrient surplus, transport distance, heat availability, size of the plant, etc.). In individual cases, the processing of biogas digestate may well be economically viable, especially in the case of long transport distances.
{"title":"Gärrestaufbereitung als Beitrag zur Nährstoffentfrachtung von Überschussregionen – Kosten und Treibhausgasemissionen","authors":"U. Roth, S. Wulf, Maximilian Fechter, Carsten Herbes, Johannes Dahlin","doi":"10.15150/LT.2021.3266","DOIUrl":"https://doi.org/10.15150/LT.2021.3266","url":null,"abstract":"The processing of slurry and biogas digestate reduces their volume and separates nutrient flows, especially in regions with nutrient surpluses. This makes it possible to cut transport costs for supra-regional utilisation and to configure tailor-made products for different customers. However, the additional capital and equipment costs can usually only be compensated by revenue from the CHP bonus for the use of excess heat from combined heat and power systems in biogas plants, unless high prices can be achieved for the products outside agriculture. The use of heat also has a considerable impact on the greenhouse gas emissions associated with processing. If reference emissions are charged because the heat is no longer available to replace fossil resources, this far outweighs savings from transport. However, it is not possible to draw general conclusions due to the diverse plant-specific conditions (amount and type of nutrient surplus, transport distance, heat availability, size of the plant, etc.). In individual cases, the processing of biogas digestate may well be economically viable, especially in the case of long transport distances.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":"6 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41299187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As a consequence of rapid ongoing technological developments and increasing integration into agricultural mechanization and agricultural intelligence, UAVs are gradually starting to play an increasingly important role in field crop management and monitoring. This review introduces and covers the development in four major applications of UAVs in maize production: (i) water stress detection, (ii) weed mapping, (iii) nutrient status monitoring and (iv) yield prediction. In addition, this review summarizes UAV data management methods, explains how expert systems work in UAV systems, and provides standardized workflow data for farmers in maize production. In addition, the strengths, weaknesses, opportunities, and threats of UAV use in maize production are analyzed. Based on more than eighty publications and our own research, the discussion and conclusions point out key issues in UAV usage in maize cropping and research gaps that need to be filled, along with a number of recommendations for the development of UAVs in maize production in the future.
{"title":"Unmanned aerial vehicle (UAV) technical applications, standard workflow, and future developments in maize production – water stress detection, weed mapping, nutritional status monitoring and yield prediction","authors":"Xiuhao Quan, R. Doluschitz","doi":"10.15150/LT.2021.3263","DOIUrl":"https://doi.org/10.15150/LT.2021.3263","url":null,"abstract":"As a consequence of rapid ongoing technological developments and increasing integration into agricultural mechanization and agricultural intelligence, UAVs are gradually starting to play an increasingly important role in field crop management and monitoring. This review introduces and covers the development in four major applications of UAVs in maize production: (i) water stress detection, (ii) weed mapping, (iii) nutrient status monitoring and (iv) yield prediction. In addition, this review summarizes UAV data management methods, explains how expert systems work in UAV systems, and provides standardized workflow data for farmers in maize production. In addition, the strengths, weaknesses, opportunities, and threats of UAV use in maize production are analyzed. Based on more than eighty publications and our own research, the discussion and conclusions point out key issues in UAV usage in maize cropping and research gaps that need to be filled, along with a number of recommendations for the development of UAVs in maize production in the future.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66964935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the past few years, portable and smartphone-based diagnostic technologies have found their way into the agri-food industry. The aim of this research was to evaluate the performance of portable near-infrared (NIR) spectrometers, so called food-scanners, with regard to their predictive accuracy of important quality parameters of fruit and vegetables. Food-scanner measurements were performed in combination with destructive measurements of the corresponding quality trait (sugar content, dry matter, relative water content) on a wide range of produce from the fruit and vegetable assortment. This study evaluated dry matter content of apple, avocado, blueberry, table grape and tangerine, which yielded cross validation results (r²) of up to 0.95, 0.87, 0.94, 0.92 and 0.92 respectively. Furthermore, the evaluation of food-scanner spectra for the prediction of sugar content of blueberry, kiwi, mango, persimmon, table grape, tangerine and tomato yielded cross validations (r²) of up to 0.95, 0.84, 0.80, 0.75, 0.95, 0.93, and 0.87. Furthermore, relative water content of ginger obtained a cross validation correlation of r² = 0.91. The results show that these traits can be predicted with a high degree of accuracy using non-destructive measurements performed with three commercially available food-scanners SCiO™, F-750 Produce Quality Meter, and H-100F. Consequently, food-scanners can be used as objective measurement tools along the supply chain of fresh produce to quickly determine fruit quality. In addition, a practical example shows the potential of these instruments for non-destructive quality assessment in incoming goods control at fruit and vegetable wholesalers over a time period of several weeks. Furthermore, possible areas of application of food-scanners along the supply chain of fresh produce are discussed, possibilities for practical applications are presented and time-saving means are highlighted.
{"title":"Food-scanner applications in the fruit and vegetable sector","authors":"Simon Goisser, S. Wittmann, H. Mempel","doi":"10.15150/LT.2021.3264","DOIUrl":"https://doi.org/10.15150/LT.2021.3264","url":null,"abstract":"In the past few years, portable and smartphone-based diagnostic technologies have found their way into the agri-food industry. The aim of this research was to evaluate the performance of portable near-infrared (NIR) spectrometers, so called food-scanners, with regard to their predictive accuracy of important quality parameters of fruit and vegetables. Food-scanner measurements were performed in combination with destructive measurements of the corresponding quality trait (sugar content, dry matter, relative water content) on a wide range of produce from the fruit and vegetable assortment. This study evaluated dry matter content of apple, avocado, blueberry, table grape and tangerine, which yielded cross validation results (r²) of up to 0.95, 0.87, 0.94, 0.92 and 0.92 respectively. Furthermore, the evaluation of food-scanner spectra for the prediction of sugar content of blueberry, kiwi, mango, persimmon, table grape, tangerine and tomato yielded cross validations (r²) of up to 0.95, 0.84, 0.80, 0.75, 0.95, 0.93, and 0.87. Furthermore, relative water content of ginger obtained a cross validation correlation of r² = 0.91. The results show that these traits can be predicted with a high degree of accuracy using non-destructive measurements performed with three commercially available food-scanners SCiO™, F-750 Produce Quality Meter, and H-100F. Consequently, food-scanners can be used as objective measurement tools along the supply chain of fresh produce to quickly determine fruit quality. In addition, a practical example shows the potential of these instruments for non-destructive quality assessment in incoming goods control at fruit and vegetable wholesalers over a time period of several weeks. Furthermore, possible areas of application of food-scanners along the supply chain of fresh produce are discussed, possibilities for practical applications are presented and time-saving means are highlighted.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41359078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tobias Zimpel, Martin Riekert, Achim Klein, C. Hoffmann
Animal welfare is a quality indicator of modern pig farming and increasingly important to society. Animal welfare risks have multiple factors and should be recognized and mitigated early on to prevent economic risks. In this work, we use machine learning models to predict animal welfare risks. Our dataset comprises data for over 57,000 pigs with indications of 10 animal welfare risks and 14 suckling phase features. We contribute a prediction model for suckling phase deaths with an accuracy of 80.4% – providing a sizeable improvement over a majority vote‘s accuracy of only 53.1%. The proposed model may help pig farmers to prevent deaths in the suckling phase of pigs at an early stage by taking countermeasure
{"title":"Maschinelle Lernverfahren zur Prognose von Tierwohlrisiken in der Schweinehaltung","authors":"Tobias Zimpel, Martin Riekert, Achim Klein, C. Hoffmann","doi":"10.15150/LT.2021.3261","DOIUrl":"https://doi.org/10.15150/LT.2021.3261","url":null,"abstract":"Animal welfare is a quality indicator of modern pig farming and increasingly important to society. Animal welfare risks have multiple factors and should be recognized and mitigated early on to prevent economic risks. In this work, we use machine learning models to predict animal welfare risks. Our dataset comprises data for over 57,000 pigs with indications of 10 animal welfare risks and 14 suckling phase features. We contribute a prediction model for suckling phase deaths with an accuracy of 80.4% – providing a sizeable improvement over a majority vote‘s accuracy of only 53.1%. The proposed model may help pig farmers to prevent deaths in the suckling phase of pigs at an early stage by taking countermeasure","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48024664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Die Rinderhaltung in frei belufteten Stallanlagen stellt eine grose Emissionsquelle von Ammoniak dar. Numerische Modelle von Stallgebauden ermoglichen es, das Stromungsgeschehen, die Konzentrationsverteilungen von Schadgasen und das Emissionsverhalten eines realen Stalls unter jedem relevanten Betriebszustand virtuell am Computer zu simulieren. So lassen sich Luftungsstrategien fur frei beluftete Milchviehstalle entwickeln, welche die Emissionen verringern und gleichzeitig den Tierschutz steigern. In der vorliegenden Arbeit wurde das numerische Modell eines real existierenden Milchviehstalls um eine partielle Unterflurabsaugung mit anschliesender Abluftreinigung erweitert und das Emissionsverhalten bei verschiedenen Anstrombedingungen und Betriebszustanden berechnet. Die Simulationen zeigten dabei ein deutliches Potenzial fur eine Minderung der Ammoniakemissionen und Moglichkeiten fur eine Optimierung der Luftung eines offenen Stallsystems. In vergleichbaren Arbeiten konnte ebenfalls uber numerische Simulationen eine positive Wirkung der partiellen Unterflurabsaugung hinsichtlich der Ammoniakemissionen frei belufteter Rinderstalle erkannt werden. In diesem Zusammenhang wurde auch eine grundsatzlich verbesserte Stallluftung durch die partielle Unterflurabsaugung festgestellt.
{"title":"Berechnung des Ammoniakemissionsminderungspotenzials an einem frei belüfteten Milchviehstall mit Hilfe eines numerischen Modells","authors":"Julian Hartje, S. Linke","doi":"10.15150/LT.2021.3259","DOIUrl":"https://doi.org/10.15150/LT.2021.3259","url":null,"abstract":"Die Rinderhaltung in frei belufteten Stallanlagen stellt eine grose Emissionsquelle von Ammoniak dar. Numerische Modelle von Stallgebauden ermoglichen es, das Stromungsgeschehen, die Konzentrationsverteilungen von Schadgasen und das Emissionsverhalten eines realen Stalls unter jedem relevanten Betriebszustand virtuell am Computer zu simulieren. So lassen sich Luftungsstrategien fur frei beluftete Milchviehstalle entwickeln, welche die Emissionen verringern und gleichzeitig den Tierschutz steigern. In der vorliegenden Arbeit wurde das numerische Modell eines real existierenden Milchviehstalls um eine partielle Unterflurabsaugung mit anschliesender Abluftreinigung erweitert und das Emissionsverhalten bei verschiedenen Anstrombedingungen und Betriebszustanden berechnet. Die Simulationen zeigten dabei ein deutliches Potenzial fur eine Minderung der Ammoniakemissionen und Moglichkeiten fur eine Optimierung der Luftung eines offenen Stallsystems. In vergleichbaren Arbeiten konnte ebenfalls uber numerische Simulationen eine positive Wirkung der partiellen Unterflurabsaugung hinsichtlich der Ammoniakemissionen frei belufteter Rinderstalle erkannt werden. In diesem Zusammenhang wurde auch eine grundsatzlich verbesserte Stallluftung durch die partielle Unterflurabsaugung festgestellt.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":"76 1","pages":"1-23"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41985263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Das Noise-Vibration-Harshness(NVH)-Verhalten von Fahrzeugen ist heutzutage ein wichtiges Kaufkriterium. Zur Analyse des NVH-Verhaltens in fruhen Phasen des Produktentwicklungsprozesses werden validierte Modellierungsmethoden benotigt. In diesem Beitrag wird eine Methodik zur modellbasierten Prognose des NVH-Verhaltens eines Traktors mit hydrostatisch-mechanischem Leistungsverzweigungsgetriebe (LVG) vorgestellt. Ziel der Modellierungsmethode ist die effiziente Berechnung des durch Getriebeanregungen verursachten Korper- und Luftschalls unter Berucksichtigung eines weiten Betriebs- und Frequenzbereichs. In Anlehnung an die maschinenakustische Schallubertragungskette, die aus Anregungs-, Struktur- und Abstrahlverhalten besteht, wurde ein Gesamtsystemmodell entwickelt, das die Domanen der Hydrostatik, Strukturdynamik und Akustik kombiniert.In diesem Beitrag wird der Aufbau des Systemmodells und dessen Anwendung auf einen Serientraktor mit hydrostatisch-mechanischem LVG vorgestellt. Es werden Simulationsergebnisse fur den Korperschall und den abgestrahlten Luftschall uber einen weiten Betriebsbereich gezeigt. Der Vergleich mit Messergebnissen zeigt hohe Ubereinstimmungen sowohl im Anregungs- als auch im Struktur- und Abstrahlverhalten.
{"title":"NVH-Systemsimulation eines Traktors mit hydrostatisch-mechanischem Leistungsverzweigungsgetriebe","authors":"Gerwin Pasch, G. Jacobs, Joerg Berroth","doi":"10.15150/LT.2020.3254","DOIUrl":"https://doi.org/10.15150/LT.2020.3254","url":null,"abstract":"Das Noise-Vibration-Harshness(NVH)-Verhalten von Fahrzeugen ist heutzutage ein wichtiges Kaufkriterium. Zur Analyse des NVH-Verhaltens in fruhen Phasen des Produktentwicklungsprozesses werden validierte Modellierungsmethoden benotigt. In diesem Beitrag wird eine Methodik zur modellbasierten Prognose des NVH-Verhaltens eines Traktors mit hydrostatisch-mechanischem Leistungsverzweigungsgetriebe (LVG) vorgestellt. Ziel der Modellierungsmethode ist die effiziente Berechnung des durch Getriebeanregungen verursachten Korper- und Luftschalls unter Berucksichtigung eines weiten Betriebs- und Frequenzbereichs. In Anlehnung an die maschinenakustische Schallubertragungskette, die aus Anregungs-, Struktur- und Abstrahlverhalten besteht, wurde ein Gesamtsystemmodell entwickelt, das die Domanen der Hydrostatik, Strukturdynamik und Akustik kombiniert.In diesem Beitrag wird der Aufbau des Systemmodells und dessen Anwendung auf einen Serientraktor mit hydrostatisch-mechanischem LVG vorgestellt. Es werden Simulationsergebnisse fur den Korperschall und den abgestrahlten Luftschall uber einen weiten Betriebsbereich gezeigt. Der Vergleich mit Messergebnissen zeigt hohe Ubereinstimmungen sowohl im Anregungs- als auch im Struktur- und Abstrahlverhalten.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49441841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lennart Trösken, Arwid Meiners, Ludger Frerichs, S. Böttinger
Many factors determine the fuel consumption of agricultural process chains. The farm structure, the machinery and equipment or the type and design of process steps are some examples. A simulation model developed within the research project “Efficient fuel use in agricultural technology” (EKoTech) enables model-based calculations of fuel consumption during plant production. Model farms provide the basis for the simulation computations. They describe relevant representative agricultural regions in Germany and other European countries for various process chains as a virtual image of an average farm in the respective region. The presented simulation results quantify the development of fuel consumption in the identified process chains from 1990 through 2015 to 2030 and estimate the saving potentials of selected technologies for a fuel consumption reduction.
{"title":"Modellbasierte Berechnung von Kraftstoffverbräuchen landwirtschaftlicher Verfahrensketten","authors":"Lennart Trösken, Arwid Meiners, Ludger Frerichs, S. Böttinger","doi":"10.15150/LT.2020.3253","DOIUrl":"https://doi.org/10.15150/LT.2020.3253","url":null,"abstract":"Many factors determine the fuel consumption of agricultural process chains. The farm structure, the machinery and equipment or the type and design of process steps are some examples. A simulation model developed within the research project “Efficient fuel use in agricultural technology” (EKoTech) enables model-based calculations of fuel consumption during plant production. Model farms provide the basis for the simulation computations. They describe relevant representative agricultural regions in Germany and other European countries for various process chains as a virtual image of an average farm in the respective region. The presented simulation results quantify the development of fuel consumption in the identified process chains from 1990 through 2015 to 2030 and estimate the saving potentials of selected technologies for a fuel consumption reduction.","PeriodicalId":35524,"journal":{"name":"Landtechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47770415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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