title: The Implementation in VISSIM REALTIME of an Active Electromagnetic Damper Controller for Lightweight Electric Vehicles

authors: Fow, Alista John

subjects: active

abstract: The use of linear electromagnetic active damper units in the suspension system of a lightweight electric vehicle offers many advantages over conventional passive, semi-active and active hydraulic dampers. While full active hydraulic systems have been commercially available in automobiles for many years, the linear electromagnetic active damper offers a lower weight system with a much reduced power demand. However an active system requires the use of a controller to adjust the power output to the damper unit. This unit must process signal inputs and provide an output solution within a short time period, often 5 milliseconds or less. By using VISSIM REALTIME, a controller was built that controlled a scale linear electromagnetic damper using Karnopp’s Skyhook algorithm. This had to deal with issues such as accelerometer drift and signal to noise ratio. These required simple but fast techniques to provide useful information to the damper in a useful timeframe. This controller-damper combination proved effective in reducing the vibration experienced by the sprung mass and was more effective than an ideal passive damper at all frequencies tested by at least a factor of three.

text: The Implementation in VISSIM REALTIME of an Active Electromagnetic Damper Controller for Lightweight Electric Vehicles The use of linear electromagnetic active damper units in the suspension system of a lightweight electric vehicle offers many advantages over conventional passive, semi-active and active hydraulic dampers. While full active hydraulic systems have been commercially available in automobiles for many years, the linear electromagnetic active damper offers a lower weight system with a much reduced power demand. However an active system requires the use of a controller to adjust the power output to the damper unit. This unit must process signal inputs and provide an output solution within a short time period, often 5 milliseconds or less. By using VISSIM REALTIME, a controller was built that controlled a scale linear electromagnetic damper using Karnopp’s Skyhook algorithm. This had to deal with issues such as accelerometer drift and signal to noise ratio. These required simple but fast techniques to provide useful information to the damper in a useful timeframe. This controller-damper combination proved effective in reducing the vibration experienced by the sprung mass and was more effective than an ideal passive damper at all frequencies tested by at least a factor of three.

year: 2015-02-17

title: George Wilson: inspector of mines at Te Aroha

authors: Hart, Philip

abstract: A Scot who first mined on the Victorian goldfields, George Wilson then arrived in New Zealand to fight in the Waikato War. Once mining commenced at Thames, he moved there, and was involved in this industry for the rest of his life. He was also active in the Thames community. He held several official posts at Te Aroha after moving there in the early 1880s, the most important being as the mining inspector. Before acquiring these positions, he had invested in mines there. He did all he could to assist the development of the Te Aroha field, notably by encouraging miners to become more skilled.
His efficiency led to his being appointed as the mining inspector for Hauraki and then the chief inspecting engineer for the Mines Department. Before official duties required him to leave Te Aroha, he had assisted the latter community in several ways, notably in developing and improving the hot springs domain. His wife kept a low profile but was equally popular, and they died esteemed and respected by all.

text: George Wilson: inspector of mines at Te Aroha A Scot who first mined on the Victorian goldfields, George Wilson then arrived in New Zealand to fight in the Waikato War. Once mining commenced at Thames, he moved there, and was involved in this industry for the rest of his life. He was also active in the Thames community. He held several official posts at Te Aroha after moving there in the early 1880s, the most important being as the mining inspector. Before acquiring these positions, he had invested in mines there. He did all he could to assist the development of the Te Aroha field, notably by encouraging miners to become more skilled.
His efficiency led to his being appointed as the mining inspector for Hauraki and then the chief inspecting engineer for the Mines Department. Before official duties required him to leave Te Aroha, he had assisted the latter community in several ways, notably in developing and improving the hot springs domain. His wife kept a low profile but was equally popular, and they died esteemed and respected by all.

year: 2016

title: Māori education as justice and reckoning

authors: Hemi, Keakaokawai Varner

abstract: Hypothetical musings on what constitutes justice have been taking place at least since the ancient Greek philosopher Plato recorded the above debate between Socrates and Cephalus in Republic circa 380 BCE. Modem philosophical notions of justice have also often been heady stuff relying on heuristic "device[ s] of representation"², "thick and thin"³ theories and other abstract conceptions to untangle real-world inequalities. In comparison, current questions of access to justice are earthy, grunty and real. Increasingly vociferous access to justice claims cite the actual injustice-laden histories of particular groups, speak in terms of harm already inflicted and call for reparative, restorative or healing justice. Indigenous peoples, African-Americans and other disenfranchised, excluded and oppressed groups quote dates, casualty numbers and the legislative section or treaty responsible. For many indigenous people, any single incident is always just one among many in the collective memory; there are always more dates, cases,⁴ facts and figures in the "litany of injustices"⁵ which evidence denial of justice. Gritty statistics in one area of well-being flow into another and over generations. This is justice in the trenches, a place where numbers and statistics are what they are.

text: Māori education as justice and reckoning Hypothetical musings on what constitutes justice have been taking place at least since the ancient Greek philosopher Plato recorded the above debate between Socrates and Cephalus in Republic circa 380 BCE. Modem philosophical notions of justice have also often been heady stuff relying on heuristic "device[ s] of representation"², "thick and thin"³ theories and other abstract conceptions to untangle real-world inequalities. In comparison, current questions of access to justice are earthy, grunty and real. Increasingly vociferous access to justice claims cite the actual injustice-laden histories of particular groups, speak in terms of harm already inflicted and call for reparative, restorative or healing justice. Indigenous peoples, African-Americans and other disenfranchised, excluded and oppressed groups quote dates, casualty numbers and the legislative section or treaty responsible. For many indigenous people, any single incident is always just one among many in the collective memory; there are always more dates, cases,⁴ facts and figures in the "litany of injustices"⁵ which evidence denial of justice. Gritty statistics in one area of well-being flow into another and over generations. This is justice in the trenches, a place where numbers and statistics are what they are.

year: 2017