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Images for magnet; more images...

Images, UC QuakeStudies

A photograph of a Canterbury Rollercoaster fridge magnet. The Canterbury Rollercoaster was designed to raise awareness around emotional literacy in Canterbury. The photograph was uploaded as a cover photo on the All Right? Facebook page on 3 September 2014 at 6:28pm.

Images, UC QuakeStudies

A photograph of a Canterbury Rollercoaster fridge magnet, which was used as a cover photo on the All Right? Facebook page. The Canterbury Rollercoaster was designed to raise awareness around emotional literacy in Canterbury. All Right? posted the photograph on their Facebook page on 2 May 2014 at 8:53am.

Images, UC QuakeStudies

An image promoting the 'Canterbury Rollercoaster' poster and magnet set that were available from the All Right? website. The image includes a description of the 'Canterbury Rollercoaster' and instructions on how to get one from the All Right? website. The 'Canterbury Rollercoaster' was designed to raise awareness about emotional literacy in Canterbury.

Images, Canterbury Museum

Fabric butterfly with wings of mesh with wire skeleton decorated with silver and blue glitter and sequins. The polystyrene body of the butterfly has a magnet attached underneath.

Images, UC QuakeStudies

A photograph of an All Right? Canterbury Rollercoaster on a whiteboard in a school classroom. Children have written their initials on the cab magnets and placed them on the rollercoaster to show how they are feeling. All Right? posted the photograph on their Facebook page on 21 July 2014 at 11:00am.

Images, UC QuakeStudies

A photograph of an All Right? Canterbury Rollercoaster on a whiteboard in a school classroom. Children have written their initials on the cab magnets and placed them on the rollercoaster to show how they are feeling. All Right? posted the photograph on their Facebook page on 21 July 2014 at 11:00am.

Images, UC QuakeStudies

An image advertising the All Right? Canterbury Rollercoaster fridge magnet set, which was designed to raise awareness around emotional literacy in Canterbury. The image was used as a profile picture on the All Right? Facebook page. The image was also posted to Facebook by All Right? on 21 July 2014 at 11:00am.

Research papers, University of Canterbury Library

Earthquakes cause significant damage to buildings due to strong vibration of the ground. Levitating houses using magnets and electromagnets would provide a complete isolation of ground motion for protecting buildings from seismic damage. Two types of initial configuration for the electromagnet system were proposed with the same air gap (10mm) between the electromagnet and reluctance plate. Both active and passive controller are modelled to investigate the feasibility of using a vibration control system for stabilizing the magnetic system within the designed air gap (10mm) in the vertical direction. A nonlinear model for the magnetic system is derived to implement numerical simulation of structural response under the earthquake record in Christchurch Botanic Gardens on 21 February 2011. The performance of the uncontrolled and the controlled systems are compared and the optimal combination of control gains are determined for the PID active controller. Simulation results show both active PID controller with constant and nonlinear attracting force are able to provide an effective displacement control within the required air gap (+/-5mm). The maximum control force demand for the PID controller in the presence of nonlinear attracting force is 4.1kN, while the attracting force in equilibrium position is 10kN provided by the electromagnet. These results show the feasibility of levitating a house using the current electromagnet and PID controller. Finally, initial results of passive control using two permanent magnets or dampers show the structural responses can be effectively reduced and centralized to +/-1mm using a nonlinear centring barrier function.