Techniques for controlling rotor speed of a wind turbine. One technique includes defining a system model describing resonance dynamics of a wind turbine component, such as a wind turbine tower, where the system model has a nonlinear input term, e.g. a periodic forcing term. A transform is applied to the system model to obtain a transformed model for response oscillation amplitude of the wind turbine component, where the transformed model has a linear input term. A wind turbine model describing dynamics of the wind turbine is then defined, and includes the transformed model. A model-based control algorithm, e.g. model predictive control, is applied using the wind turbine model to determine at least one control output, e.g. generator torque, and the control output is used to control rotor speed of the wind turbine.

An apparatus comprising a power source, one or more sensors, a transceiver, and a memory. The power source may be configured to store energy to power the apparatus. The one or more sensors may be configured to receive captured data from one of a plurality of sources. The transceiver may be configured to send and receive data to and from a wireless network. The processor may be configured to execute computer readable instructions. The memory may be configured to store a set of instructions executable by the processor. The instructions may be configured to (A) evaluate an expected power usage budget calculated using a predictive model of future energy consumption and (B) (i) store the captured data in the memory in a first mode and (ii) transmit the captured data to a remote storage device in a second mode. The first mode or the second mode is selected based on characteristics of the captured data received from the sensors.

A method for controlling a charge transfer of an electric vehicle using an electric vehicle charging station, a mobile device, and a cloud server is disclosed. The method includes: receiving, at a mobile device, a message for an electric vehicle of a user from the electric vehicle charging station, wherein a user of the mobile device is associated with the electric vehicle to be charged; sending, from the mobile device, the message for the electric vehicle of the user to the cloud server, wherein the charge transfer request relayed from the mobile device includes identification information; in response to a charging control signal being authorized using identification information received from the mobile device, receiving the charging control signal from the cloud server at the mobile device to be forwarded to the electric vehicle charging station, wherein the charging control signal is configured to adjust a charging parameter at the electric vehicle charging station.

A method is disclosed for controlling the operating of a consumption appliance by way of a selector switch controlled by an energy saving device connected to a management center. The consumption appliance is kept in its default power mode, until receiving, by the energy saving device, an authentic secured control message sent by the management center. This message includes a command onto the mode in which the consumption appliance has to be switched. A counter is initialized with an initialization value before to be triggered. The consumption appliance is switched in the mode indicated by the command, either until the counter has reached a threshold value, or until receiving another authentic control message. If the counter has reached the threshold value, then the consumption appliance is switched in its default power mode. If another authentic secured control message has been received, then returning to the step of initializing the counter.

A positioning method for positioning a first device and a second device separated from the first device is described. The second device is moved so as to approach the first device, a first mark on the first device and a second mark on the second device are imaged, and information is output based on the imaging the first mark and the second mark.

A positioning method for positioning a first device and a second device separated from the first device is described. The second device is moved so as to approach the first device, a first mark on the first device and a second mark on the second device are imaged, and information is output based on the imaging the first mark and the second mark.

A vaporiser for an aerosol generating device comprises: a heating element including a sheet of heating material; a tubular heater housing arranged to hold the heating element within the heater housing; and a liquid store . The heater housing comprises a longitudinal gap running along the length of the tubular heater housing, and the heating element is arranged such that a peripheral edge of the heating element is supported within the gap. The gap is arranged to allow a liquid to pass from the liquid store into the heater housing to be vaporised by the heating element during use. The size of the gap is variable to change the rate of liquid flow through the gap , and, in particular, to maintain an optimum liquid flow rate despite a varying viscosity of the vaporisable liquid due to temperature or to differing types of vaporisable liquid being used.

A vaporiser for an aerosol generating device comprises: a heating element including a sheet of heating material; a tubular heater housing arranged to hold the heating element within the heater housing; and a liquid store . The heater housing comprises a longitudinal gap running along the length of the tubular heater housing, and the heating element is arranged such that a peripheral edge of the heating element is supported within the gap. The gap is arranged to allow a liquid to pass from the liquid store into the heater housing to be vaporised by the heating element during use. The size of the gap is variable to change the rate of liquid flow through the gap , and, in particular, to maintain an optimum liquid flow rate despite a varying viscosity of the vaporisable liquid due to temperature or to differing types of vaporisable liquid being used.

An energy optimization system for a building includes a processing circuit configured to generate a user interface including an indication of one or more economic load demand response (energy) operation parameters, one or more first participation hours, and a first load reduction amount for each of the one or more first participation hours. The processing circuit is configured to receive one or more overrides of the one or more first participation hours from the user interface, generate one or more second participation hours, a second load reduction amount for each of the one or more second participation hours, and one or more second equipment loads for the one or more pieces of building equipment based on the received one or more overrides, and operate the one or more pieces of building equipment to affect an environmental condition of the building based on the one or more second equipment loads.

A servomotor (20) is driven to move a machine (10) with a ball screw (30). A first sensor (50) detects presence of the machine (10) at a first reference position (P) being predefined. A controller (60) stores a state of the servomotor (20) detected by an encoder (40) as reference state information upon detection of the machine (10) by the first sensor (50). The controller (60) estimates a position of the machine (10) based on the state of the servomotor (20) detected by the encoder (40) and the reference state information.