Abstract: A method of reducing energy consumption of heating, ventilation and air conditioning (HVAC) equipment in a multi-room building. The energy consumption that would result from a particular candidate room allocation is used in order to determine how to allocate loads across the HVAC equipment. A candidate room allocation can be selected to optimise the efficiency of the HVAC equipment based on the proposed load that the HVAC equipment would be under should that candidate room allocation be selected.

Abstract: An apparatus includes a frequency analyzer circuitry, filter circuitry, and voice coil motor (VCM) control circuitry. The frequency analyzer circuitry is configured to detect one or more dominant frequencies of a position error signal (PES). The filter circuitry is configured to identify one or more filters in response to detecting the one or more dominant frequencies, apply the one or more identified filters to at least one of a microactuator control signal and PES, and generate a VCM compensation signal in response to the filtered PES or the microactuator control signal. The VCM control circuitry is configured to generate a VCM control signal in response to the VCM compensation signal.

Abstract: An apparatus includes a controller configured to be coupled to a read/write head. The controller is configured to perform various operations including detecting a change in a time interval difference between servo sectors of a servo marked recording medium, converting the change to an offset signal that compensates for the change, and positioning the read/write head relative to the servo mark recording medium in response to the offset signal. The change in the time interval difference is representative of disk slip.