848 results about "Measuring output" patented technology

Calibrating a posture detector for a patient's body involves measuring outputs of one or more sensors disposed in relation to the patient's body while the patient assumes a plurality of positions. A transfer matrix is formed having coefficients corresponding to the measured outputs. The transfer matrix defines a relationship between a coordinate system of the one or more sensors and a coordinate system of the patient's body. The body coordinate system is used as a reference coordinate system for posture detection. Posture, including tilt and/or tilt angle, may be determined based on first and second rotational angles defined in relation to the body coordinate system.

A data transmission device 10 serving as a traffic distribution control device is a device which, in order to distribute traffic across a plurality of physical ports composing a logical port for link aggregation, uses a hash function to calculate a hash value from a destination address and a source address of a receive packet, and determines a destination physical port. The traffic distribution control device includes a measuring unit 13 that measures an output flow rate of a packet outputted from each of the plurality of physical ports; a calculating unit 14 that calculates a flow rate ratio between the plurality of physical ports with respect to the measured output flow rates; and a first control unit 12 that feeds the calculated flow rate ratio back to a bandwidth distribution ratio between the plurality of physical ports to change numerical allocation of hash values for determining the destination physical port.

An electrosurgical device for treating a body tissue with a high-frequency power includes an electrode for exposing the body tissue to the high-frequency power for treatment, and a high-frequency cautery power supply having a control circuit that outputs a high-frequency power generator for outputting the high-frequency power to the electrode. The control circuit of the high-frequency cautery power supply includes a timer for measuring output time and suspension time of the high-frequency power applied to the body tissue, a counting unit for counting the number of output of the high-frequency power, an impedance detector for detecting an impedance of the body tissue in the coagulated state thereof when the body tissue is treated using the high-frequency power applied from the electrode, an impedance comparator for comparing the impedance of the coagulated tissue detected by the impedance detector with an impedance predetermined for the purpose of the treatment of a region to be treated, and a high-frequency power switch for switching the output of the high-frequency power generator.

An RF device including a control loop for maximizing output power for each of several data rates or constellation types. The RF device includes a power detector, a power amplifier and a MAC that includes input and output adjust circuits. A power level value is generated from measured output power. The MAC compares an adjusted power level value with a set point value and generates an error value. The MAC adjusts a power control value based on the error value for controlling the gain of the power amplifier. The MAC uses a data rate signal indicative of a selected constellation type or data rate. The input adjust circuit stores one or more input adjustment values selected by the data select signal for adjusting the power level value. The output adjust circuit stores one or more output adjustment values selected by the data select signal for adjusting the power control value.

A method for non-intrusively monitoring a load including a plurality of appliances includes retrieving a plurality of mathematical models for modeling operation of a respective subset of the appliances. A value of a respective operational parameter is predicted for each of the subsets of appliances. An output of the load is measured. A respective value of each of the operational parameters is calculated based on the mathematical models and the outputs of the load. The predicting, measuring and calculating steps are repeated until a metric pertaining to a difference error between the measured output and the predicted output calculated from the operational parameter and the mathematical models is equal to or below a threshold for one of the subsets of appliances. It is decided that the one subset of appliances is currently operating whose metric pertaining to a difference error is equal to or below the threshold.

A system for and method of modeling thermal performance characteristics of HVAC components in a building uses the building power or other meter to measure power consumed by the components. The models are used to test the components, preferably during off hours, to ensure proper and efficient operation. Preferably, the testing software is written in a high-level interpretive language that is independent of the HVAC component being modeled. The models are adaptively maintained by periodically ensuring that their measured output matches the predicted output. When the two do not match, the model parameters are updated. These models can also be used to generate reports comparing costs and cost savings for different temperature and other environmental settings within selected zones in the building.

Power conversion systems and methods are presented for damping common mode resonance, in which inverter or rectifier switching control signals are selectively modified according to a damping resistance current value computed using a predetermined virtual damping resistance value in parallel with an output or input capacitor and a measured output or input voltage value to mitigate or reduce common mode resonance in the converter.

An apparatus and method thereof for measuring an output current from a primary side of a power converter are provided. A peak detector is designed to sample a peak value of a converted voltage of a primary-side switching current. A zero-current detector detects a discharge-time of a secondary-side switching current through an auxiliary winding of a transformer. An oscillator generates a switching signal for switching the power converter. An integrator generates an integrated signal by integrating the converted voltage of the primary-side switching peak current with the discharge-time. The time constant of the integrator is correlated with the switching period of the switching signal. The integrated signal is thus proportional to the output current of the power converter.

Embodiments of the present invention are directed to a system and method for controlling fabrication of three-dimensional objects, layer by layer, the system comprising a printing assembly, including an irradiation unit and a printing head, the printing assembly is movable between a printing area and a service area. A light sensor positioned at the service area to measure output radiation power of the irradiation unit at a printing plane and a controller to receive information from the sensor and to automatically adjust electrical power supplied to the irradiation unit based on the information.

A transmitter includes a coupler (318) to measure output power. The output power is compared to a set value and a threshold. If the power is above the threshold, the gain of an output amplifier (316) is adjusted toward the set value. If the power is below the threshold, an extrapolation of the linear portion is used to obtain the set power level.

A constant-power switching power supply has an inductor with an inductor current that remains in discontinuous conduction mode (DCM), where the power supply supplies and maintains constant output power to a load without measuring output parameters, by regulating charge-up time of the inductor. A method of maintaining a constant output power for a power supply being run in discontinuous conduction mode (DCM), having an inductor, includes obtaining a measured input voltage for voltage being input to the power supply, obtaining from a memory a set of values based on the measured input voltage, and driving a pulse width modulation (PWM) generator based on the set of values, the driving of the PWM generator thereby regulating a charge-up time of the inductor to correspond to the measured input voltage, whereby the regulating of the charge-up time of the inductor maintains an essentially constant power for a load.

A multiband phone capable of transmitting a signal within a plurality of distinct frequency bands having a single wide frequency range power detecting device capable of measuring the power of the transmitted signal over all of the plurality of frequency bands. The multiband phone includes multiple power amplifiers, where each power amplifier amplifies the power of a signal transmitted within a different frequency band. A power amplifier controller is provided for controlling the amount of amplification performed by the power amplifiers, where a switching device switches the connection of the power amplifier controller to a selected power amplifier. The single wide frequency range power detecting device is connected to the output of the all of the power amplifiers through a switching device, where the switching device connects the power detecting device to the particular power amplifier selected for transmission. The power detector then measures the power of the signal transmitted and feeds the measured power back to the power amplifier controller. The power amplifier controller may then adjust the voltage driving the power amplifier connected thereto based upon any difference detected between the desired output power and the measured output power. The performance of the wide frequency range power detecting device is adjusted for the specific transmission frequencies utilized by the multiband phone in order to achieve optimal power detection sensitivity over all of the multiple frequencies.

An electronic device under test (DUT) responds to a digital input signal by generating a digital DUT output signal conveying a repetitive digital signal pattern. An apparatus for measuring various characteristics of the DUT output signal includes a trigger generator for generating a series of trigger signal edges in response to selected DUT output signal edges occurring during separate repetitions of the digital signal pattern. The trigger generator can be configured to generate each trigger signal edge in response to the same or a different edge of the digital signal pattern. The apparatus determines when a DUT output signal edge occurs by determining when the DUT output signal rises above or falls below adjustable reference voltages. The apparatus alternatively responds to each trigger signal edge by measuring a period between two different edges of the digital signal pattern and or by repetitively sampling the DUT output signal to determine its state.

A model predictive controller (MPC) for predictive control of nonlinear processes utilizing an EKF (Extended Kalman Filter) and a nominal trajectory generator. The nominal trajectory generator includes another instance of EKF, a linear corrector, and a time-varying deviation model. A nominal control trajectory can be predicted and an optimal solution for the time-varying deviation model can be computed based on an approximation of a system inverse known as signal de-convolution. The EKF can be utilized to estimate a current process state by supplying a measured output and to predict a future nominal trajectory by supplying a reference output. A Kalman smoother can also be utilized for the signal de-convolution in order to obtain enhanced trajectory estimates.

A method is disclosed for estimating clutch engagement characteristics of a friction clutch system in a vehicle powertrain. A dynamic model of the system is used under conditions that cause clutch slipping. Algebraic equations defining a functional relationship between clutch torque and an engagement angle have characteristic parameters that are estimated using a non-linear least squares technique. A non-linear least squares technique iteratively minimizes the difference between a measured output clutch disk speed and an output clutch disk speed from the system dynamic model for the same inputs until a small insignificant error is reached. Parameter estimates are used to compile an estimated clutch engagement characteristic.

A star sensor attitude-determination method during the autonomous orbital control fault recovery includes: (1) predicting the satellite inertia attitude according to data measured by a gyro; (2) calculating the filtering modified innovation amount according to the inertia attitude of the satellite and the optical axis vector and the lateral axis vector under an inertial coordinate system which are measured and output by the star sensor, and calculating the error of the innovation amount between the front and the back periodicals, which is used for judging the consistency of star sensor data; (3) judging the consistency of the star sensor data; (4) fixing the attitude of the star sensor according to the two vectors; (5) introducing the star sensor which is combined with the gyro for the correction of the satellite attitude under the condition that the star sensor data arranges the initial value of the attitude estimation. The method can improves the reliability of the orbital control fault recovery, saves the time for the fault recovery and ensures that the orbital control is accurately recovered in time.