821results about "Mechanical pressure/force control" patented technology

A device and method is provided for automatically controlling the heating element(s) of an electric hot water heater to minimize electric energy consumption over a prolonged time period by projecting the future need for hot water based on it's use in prior time periods as well as by monitoring the use of hot water during current periods. The device saves energy by switching the heater "off" during times when the projected and current need for hot water is low or nonexistent thereby reducing the tank temperature and therefore energy losses to the ambient, while detecting the instantaneous requirement for hot water through utilization of a flow sensor arrangement, one of which is the utilization of thermistors on the exit pipe and on the tank or body of the heater. The device leaves all existing controls intact and may be adapted by end users to existing heaters or by manufacturers of original equipment (OEMs).

An exhaust gas heat exchanger system of a combustion engine has a bypass duct and a heat exchanger duct with a heat exchanger. A valve is controlled by determining when heat is to be transferred from exhaust gas flowing through the exhaust system to the heat exchanger. When heat is to be transferred, the valve is switched into a first position in which all of the exhaust gas flows through the heat exchanger duct. A pressure drop across the heat exchanger system is monitored either directly or indirectly. If the pressure drop reaches a predefined limit, the valve is switched into an intermediate position, resulting in a smaller portion of the exhaust gas flowing through the heat exchanger duct than when the valve is in the first position and a remaining portion flowing through the bypass duct, thereby reducing the pressure drop across the heat exchanger system. If the pressure drop again reaches a predefined limit, the valve is switched into a second position, resulting in an even smaller portion of the exhaust gas flowing through the heat exchanger duct, thereby further reducing the pressure drop across the heat exchanger system.

A moving behavior control device for a vehicle calculates first target braking forces to be applied to the respective wheels for stabilizing the vehicle against a turn instability, second target braking forces to be applied to the respective wheels for stabilizing the vehicle against a roll instability, and target overall braking forces to be applied to the respective wheels by integrating the first and second target braking forces, and applies braking forces to the respective wheels according to the target overall braking forces, wherein the applied braking forces are decreased according to a first rate schedule by which the applied braking forces are decreased at a first rate according to an excess of the applied braking forces relative to the target overall braking forces when the vehicle is running at no probability of rolling beyond a predetermined threshold roll, and according to a second rate schedule by which the braking forces are lowered at a second rate smaller than the first rate according to the excess when the vehicle is running at such a probability.

A position control apparatus has a target setting unit for setting a target position in a direction of the control axis of the controlled object able to be moved in directions of a plurality of control axes by moving unit; a position control unit for independently positioning the controlled object to the target position in the direction of the control axis set by the target position setting unit; and a position correcting unit for correcting the target positions in directions of other control axes by compensation amounts for correcting positioning derivation in directions of other control axes occurring when positioning the controlled object to a first target position in the direction of one control axis among the plurality of control axes and then reversing the feed direction from that first target position and positioning to a second target position.

An improved heater and method of controlling the same is provided. The water heater has the combination of a tank for holding water, a heater for heating the water, a controller having logic to regulate the heater, and first and second sensors. Each of the sensors detects the water temperature at different areas within the water heater. The sensors also provide the controller with signals corresponding to the detected water temperature. In response to these signals, the controller regulates the heater when at least one of the signals of the first and second sensors satisfies at least one predetermined state condition.

Systems, methods, and computer-implemented embodiments consistent with the inventions herein are directed to storing and/or transferring heat. In one exemplary implementation, there is provided a system for transferring/storing heat comprised of a heat exchange/storage apparatus including a chamber, and a heat input device adapted to heat/provide a vapor into the chamber. Other exemplary implementations may include one or more features consistent with a heat output device through which a working medium/fluid passes, a thermal storage medium located within the chamber, and/or a heat exchange system that delivers a heat exchange medium/fluid to the thermal storage medium.

A wind turbine generator, an active damping method thereof, and a windmill tower in which vibrations of the wind turbine generator itself or the windmill tower can be reduced at low cost are provided. The acceleration due to vibrations of a nacelle (13) is detected with an accelerometer (17) attached to the nacelle (13). In an active damping unit (20), a pitch angle of windmill blades (12) for generating a thrust on the windmill blades (12) so as to cancel out the vibrations of the nacelle (13) is calculated on the basis of the acceleration, and the pitch angle is output as a blade-pitch-angle command δθ* for damping. On the other hand, in a pitch-angle control unit (30), a pitch angle of the windmill blades (12) for controlling the output to be a predetermined value is calculated, and the pitch angle is output as a blade-pitch-angle command θ* for output control. The blade-pitch-angle command δθ* for damping is combined with the blade-pitch-angle command θ* for output control using a subtracter (40). The pitch angle of the windmill blades is controlled on the basis of the resulting blade-pitch-angle command after combining.

Provided are a temperature control device capable of performing a temperature control of, e.g., a chamber wall of a processing apparatus with a high precision; and a processing apparatus using the same. The temperature control device 50 includes a plurality of heater units 51 for heating each of a multiplicity of zones 55 into which a wall portion of a housing 2 of a chamber 1 is divided; a multiplicity of heater power supplies 52 for supplying power to each of the plurality of heater units 51; a number of thermocouples 53 for measuring the temperature of each of the multiplicity of zones 55; and a plurality of controllers 54 for controlling a corresponding power supply unit by an ILQ control based on a signal from each temperature sensor to set a temperature of a corresponding zone to a preset target temperature.

A hauling unit hauls a subject to bend or rotate the subject. A control unit outputs a control signal that corresponds to a target value that is input by an operating unit. The control unit controls a variation amount of the control signal output in a predetermined range including a position of the hauling unit in a state before the hauling unit hauls to be greater than a variation amount of the control signal output outside the predetermined range. A driving unit drives the hauling unit based on the control signal.

A method that controls pressure within an immersion cooling tank having condensation fluid flowing through a condenser, includes: a controller receiving a signal that indicates a current level of vapor pressure within the tank; determining from the signal when the current level of vapor pressure exceeds or is below a first preset threshold pressure level; and in response to the current level of vapor pressure exceeding or being below the first preset threshold pressure level, signaling a flow control mechanism that modulates a flow rate of the condensation fluid through the condenser to increase or decrease the rate of flow from a current rate of flow. The controller receives the signal by a pressure sensor within the immersion cooling tank detecting the current vapor pressure, generating the signal and forwarding the signal to the controller. The pressure sensor can be a differential pressure transducer that measures a differential pressure internal to and outside of the immersion tank.

To provide an electric power steering apparatus in which it is possible to minimize a connection distance between a control unit and an electric motor and surely prevent electric noise from mixing between the control unit and the electric motor as well as to minimize electric resistance and minimize an electric loss by directly connecting the control unit and connection terminals of the electric motor and a torque sensor. A motor control apparatus includes a steering column 3 having inserted therein a steering shaft 2 to which steering torque is transmitted, a reduction gear box 4 coupled to the steering shaft 2, and an electric motor 5 that transmits a steering assisting force to the steering shaft 2 via a reduction mechanism in the reduction gear box 4. The electric motor 5 and a control unit 19 including a control board mounted with a control circuit that controls to drive the electric motor 5 are provided side by side in the reduction gear box 4 and a connection terminal of the electric motor 5 is electrically connected to the control unit 19 directly.

In a method and a device for entering control commands into a controller of a manipulator, such as a robot, a first force or movement or sequence of forces or movements is detected, and the detected force, movement or sequence is electronically compared with stored forces, movements or sequences, respectively. Each of the stored forces or movements or sequences has a control command associated therewith. Upon the comparison indicating a coincidence between the detected force or movement or sequence with one of the stored forces or movements or sequences, the control command associated with that one of the stored forces, stored movements or stored sequences is automatically supplied as an input to the controller for operating the manipulator.

An improved heater and method of controlling the same is provided. The water heater has the combination of a tank for holding water, a heater for heating the water, a controller having logic to regulate the heater, and first and second sensors. Each of the sensors detects the water temperature at different areas within the water heater. The sensors also provide the controller with signals corresponding to the detected water temperature. In response to these signals, the controller regulates the heater when at least one of the signals of the first and second sensors satisfies at least one predetermined state condition.

A control system for providing thermal management of electronic equipment housed in a cabinet enclosure. The system can include a plurality of sensors in proximity to the cabinet enclosure for monitoring a temperature, a pressure and a humidity associated with the electronic equipment; and a controller in communication with the sensors for receiving data from the sensors, where the controller adjusts the temperature, the pressure and the humidity associated with the electronic equipment.

The invention provides on-line detection and real-time control devices for the tension of yarn, relating to an on-line detection device and a real-time control device for the tension of the yarn. A turntable which is under the action of a coil spring and is provided with two swinging arms used for hanging and tying the yarn and an angle inductor form the on-line detection device for the tension of the yarn; an output signal of the angle inductor is connected to a central controller, an output signal of the central controller is connected to a motor controller, and the motor controller is connected with an uncoiling motor and a coiling motor of the yarn; and the motor controller and the central controller form the real-time control device. The invention can realize the on-line monitoring and the on-line and real-time regulation of the tension of the yarn in the processing and production process of textile equipment yarn or other similar products and ensure the uniformity of the tension of the yarn.

Cooling apparatus providing two independent heat exchangers (18, 20) serially arranged with respect to a heat flow (42), each heat exchanger being connected to a respective independent chiller (32, 34). The apparatus incorporates an element of redundancy in order to effect an increase in operational efficiency, by being switchable between a first operation mode in which both chillers operate in a free cooling mode and a second operation mode in which a first chiller operates in a free cooling mode and a second chiller operates in a forced cooling mode.

The invention relates to a control method of alternative pressure of side guides of a hot strip mill coiler, the driving side and the operating side of the side guides are alternatively controlled by adopting a position model and a pressure model, and the technical scheme of controlling by the prior position model only is changed. The invention greatly reduces the pressure oscillation at two sides of the side guides because of alternative pressure control, obviously reduces the convolute movement defect, can adapt to the coiling of various thick and thin specifications of band steel, and can lead the pressure at two sides of the side guides to keep consistently balance, thereby ensuring the symmetry of the abrasion of the two side guides.

According to one embodiment of the present invention, there is provided cooling apparatus. The cooling apparatus comprises an outlet for supplying chilled liquid, an inlet for receiving return chilled liquid, a free cooling system for providing first cooling to the return chilled liquid, a chiller unit for further cooling the first cooled return liquid to a predetermined temperature, a pressure difference sensor for measuring the pressure difference between the chilled liquid supplied at the outlet and the return liquid received at the inlet, and a flow control module for maintaining a predetermined pressure difference between the liquid supplied at the outlet and the return liquid received at the inlet.

An arrangement having at least one movable furniture part, in particular having a drawer or the like, having at least one drive unit and at least one regulating device for regulating the at least one drive unit, wherein the arrangement (7) has at least one, preferably analog, acceleration measuring device (2), with the at least one acceleration measuring device (2) generating an acceleration signal that is characteristic of accelerations caused by forces applied to the at least one movable furniture part (3) from the outside and that may be supplied to the at least one regulating device (1).

Methods and systems for operating a water heater to limit the effects of stacking in a water heater tank are disclosed. In some cases, the water heater controller may determine a rate of change of the water temperature in the water heater tank. If the rate of change exceeds a threshold value, the controller may adjust the water heater temperature set point downward to help reduce stacking in the water heater. In some cases, the water heater temperature set point may be returned to the original water heater temperature set point when stacking is no longer likely to be of a concern. In one illustrative embodiment, the controller may track the time that the heater of the water heater is in the “on” state, or the time that the heater is in the “off” state, during subsequent heating cycles. The controller may then compare the “on” time or the “off” time to respective recovery threshold times. If the “on” time or the “off” time exceeds its respective recovery threshold time, then the controller may adjust the set point toward the original water heater temperature set point, sometimes in an incremental manner.

A water heater has a modular control system. The water heater comprises a tank, a heating element, a first controller, and a second controller. The heating element is coupled to the tank. The first controller is mounted on the tank and has a first communication port. The second controller has a second communication port communicatively coupled to the first communication port of the first controller. The first controller is configured to control the heating element in accordance with any desired algorithm in an absence of the second controller, and the second controller is configured to perform at least one function in addition to or in lieu of the first controller.