10 results about "Noise minimization" patented technology

The invention relates to the technical field of automobile air conditioner system design and optimization, in particular to an automobile air conditioner HVAC system multi-target design method based on sensitivity analysis and collaborative optimization. Screening out design variables which are respectively strongly related to the air volume and the aerodynamic noise; kriging approximation models are constructed for the two subjects of air volume and noise respectively, single-target optimization is carried out by adopting a multi-island genetic algorithm, and the optimal solution of each target in a design space is determined; an improved collaborative optimization strategy framework is constructed, a system-level optimization target is set as a weighted normalization function of air volume maximization and noise minimization, a relaxation factor is introduced to relax consistency constraint from an equation to an inequality, and minimization of difference of design variables between a system level and a subject level is taken as a subject-level target. Iterative optimization is carried out, and finally the optimal balance design of the centrifugal fan of the HVAC system is obtained.

The present invention discloses a noise damper integrated solenoid valve (20) that comprises of a housing assembly (5), a fixed core (3), a coil (2), a spring (6), a noise damper (7), a plurality of electrical connections (4) and a plunger (1). The noise damper (7) minimizes the noise during the operation of a solenoid valve, absorbs shocks, vibrations resulting in a quieter and less disruptive performance.

A method of controlling an electric aircraft, the electric aircraft including a plurality of actuators, the actuators including a plurality of electric propulsion units, the method comprising: receiving force and torque commands for the electric aircraft; determining control commands for the plurality of actuators based on desired force and torque commands by solving an optimization problem, the optimization problem including a noise minimization term for minimizing noise generated by the electric propulsion units; and controlling the plurality of actuators according to the determined control commands to satisfy the force and torque commands for the electric aircraft.

A high-intensity focused ultrasound generation device includes an integrated electrode including a ultrasound radiation frame, a transducer holder, and a transducer to allow electromagnetic interference (EMI) noise having focused only on the transducer to flow into the ultrasound radiation frame so as to minimize noise and thus is advantageous in that a signal loss due to the noise is prevented and an RF signal may be more stably applied. Furthermore, the ultrasound radiation frame, the transducer holder, and the transducer are included in the integrated electrode and thus a negative electrode of a power supplier may be connected to a negative electrode of a singular transducer or the ultrasound radiation frame so that a circuit structure may be very simple compared to a structure connected to each of a plurality of transducers.

A method of controlling an electric aircraft that has a plurality of actuators that includes a plurality of electric propulsion units includes: receiving force and moment commands for the electric aircraft; determining control commands for the plurality of actuators based on the desired force and moment commands by solving an optimization problem that comprises a noise minimization term for minimizing noise generated by the electric propulsion units; and controlling the plurality of actuators according to the determined control commands to meet the force and moment commands for the electric aircraft.

Method for minimizing noise during data acquisition with a measuring system (100) comprising the steps: Acquiring data of a reference measurement with the measuring system (100) under defined conditions, wherein the conditions include at least a total measurement time, a rate of individual measurements per time interval, an integration time per measurement, and a temperature of an array of measuring elements (102) of a measuring device (101) of the measuring system (100), wherein the data acquisition of the reference measurement comprises acquiring a plurality of individual measurements according to a reference measurement sequence; Deriving an estimator for a measure of the noise of the measuring system (100) based on measured values ​​of the reference measurement; Determining an optimized measurement sequence taking into account boundary conditions (170), which include at least one possible total measurement time and a rate of individual measurements per time interval, for intended measurements with a view to minimizing a measure of the noise, wherein the data acquisition is carried out with an imaging measuring system (100) with an array of infrared-sensitive measuring elements (102), in front of which a controllable shutter (110) is arranged such that, in a closed state of the shutter (110), none of the measuring elements (102) is exposed to radiation from a measured scene or a measured object (120), and in an open state, at least some of the measuring elements (102) are exposed to radiation from the measured scene or the measured object (120), wherein the measuring process is carried out via a A shutter sequence function is defined which, for a sequence of individual measurements acquired one after the other in time, defines which individual measurements are acquired with the shutter (110) open and which with the shutter (110) closed, wherein the estimation function for the measure of the noise is derived from a spatial-temporal autocovariance function of the measuring system (100), which is acquired on the basis of the reference measurement with the reference measurement sequence in which a sequence of individual measurements acquired one after the other in time with the shutter (110) closed.

The present invention relates to a short-axis direction horizontal linear vibration actuator, and more particularly, to a short-axis direction horizontal linear vibration actuator that effectively controls a strong vibration force by concentrating a geomagnetic field, thereby minimizing driving noise. Accordingly, as the market for virtual reality (VR) and augmented reality (AR) expands beyond the mobile phone market, the short-axis direction horizontal linear vibration actuator can be applied to various goods such as car electronics, home appliances, and beauty products.

A method of controlling an electric aircraft that has a plurality of actuators that includes a plurality of electric propulsion units includes: receiving force and moment commands for the electric aircraft; determining control commands for the plurality of actuators based on the desired force and moment commands by solving an optimization problem that comprises a noise minimization term for minimizing noise generated by the electric propulsion units; and controlling the plurality of actuators according to the determined control commands to meet the force and moment commands for the electric aircraft.

The high-intensity focused ultrasound generating apparatus according to the present invention is configured such that the ultrasonic radiation frame, the transducer holder, and the transducer are integrated as an electrode, so that the EMI (Electro Magnetic Interference) noise that was concentrated only on the transducer can be passed to the ultrasonic radiation frame, and the noise can be minimized. Therefore, there is an advantage that signal loss due to noise is prevented and an RF signal can be applied more stably. Further, since the ultrasonic radiation frame, the transducer holder, and the transducer are configured as an integrated electrode, the negative electrode of the power supply unit can be connected to the negative electrode of the ultrasonic radiation frame or a single transducer. Therefore, there is an advantage that the circuit structure can be made very simple compared to a structure in which each of a plurality of transducers is connected.

A method for detecting a beacon signal using an above-ground tracker. The tracker comprises an antenna assembly comprising a plurality of antennas. Each antenna is oriented in a different direction. During operation, if the beacon signal is interrupted due to a local noise source, transmission of the beacon signal is stopped. The tracker then detects radiation from the local noise source and the processor determines a direction from which peak ambient noise arrives at the tracker. The beacon signal is then resumed. A processor included in the tracker excludes any signals generated by the antenna assembly that are representative of radiation that arrived at the tracker from the same direction the peak ambient noise arrived at the tracker. The tracker then detects the beacon signal using the non-excluded signals.