147results about How to "Compensation deviation" patented technology

A hand held robotic system that remains stiff so long as it is operating within allowed limits, but which become actively controlled once the operator exceeds those limits. The system thus corrects deviations by more than a predetermined amount of the operator's hand motions, so that the tool remains in the allowed region even when the operator's hand deviates from the planned trajectory. The pose and path of the robotic operating head is ascertained by means of a navigation or tracking system, or by means of a proximity device to measure the closeness of the operating head to a damage sensitive feature. As the tool deviates from its predetermined path or pose, or comes too close to the hazardous area, the robot control acts to move the tool back to its predetermined pose or path, or away from the hazardous region, independently of user's hand movement.

A wind turbine or rotor load control compensates for moment imbalance in a wind turbine that includes a rotor having at least two variable pitch blades. The apparatus includes a conventional pitch command logic developing a nominal rotor blade pitch command signal and a moment sensor. The moment sensor can be one or more of a nacelle overturning moment sensor, and a turning moment sensor. An output of this is used as a moment signal. Conversion logic is connected to the moment signal with an output of the conversion logic being calculated individual pitch modulation commands for each of the blades. A combining logic is connected to receive the calculated individual blade pitch modulation commands and to receive a nominal pitch command. An output of the combining logic is individual combined blade pitch commands for each of the blades. The individual combined blade pitch commands are generated by modulating the nominal command signal by a respective blade pitch modulation command which includes compensation for instantaneous moment deviations of the wind turbine.

An image generating device, a 3D image display system having the same and control methods thereof are disclosed. The image generating device includes: a first camera configured to photograph a depth image of a subject using a first light; a second camera configured to photograph a color image of the subject by converting a second light into an image signal; a view angle extender configured to change a view angle, wherein the view angle is an angle at which the first camera and the second camera are operable to photograph the subject; and a controller configured to control the view angle extender to change the view angle of the first camera and the second camera and to form a single depth image and a single color image by respectively synthesizing a plurality of depth images and a plurality of color images, photographed by the first camera and the second camera.

The present invention refers to X-ray tubes for use in imaging applications with an improved power rating and, more particularly, to a multi-segment anode target (102′) for an X-ray based scanner system using an X-ray tube of the rotary anode type, said X-ray tube comprising a rotatably supported essentially disk-shaped rotary anode (102) with an anode target (102′) for emitting X-radiation when being exposed to an electron beam (105a) incident on a surface of said anode target (102′), wherein said rotary anode disk (102) is divided into at least two anode disk segments (102a and 102b) with each of said anode disk segments having a conical surface inclined by a distinct acute angle (α) with respect to a plane normal to the rotational axis (103a) of said rotary anode disk (102) and thus having its own focal track width. A control unit for pulsing the electron beam (105a) is provided which is adapted for pulsing the electron beam (105a) such that the electron beam has a duty cycle which takes on its switched on state only when incident on a selectable anode disk segment (102a or 102b) with an inclination angle (α) from a given angular range or on a anyone from a selectable set of these anode disk segments (102a or 102b). Controlling the electron beam's pulse sequence thereby allows to select the optimal segment of the focal spot track (106b) with the smallest possible inclination angle (α) dependent on the angular size (β) of a desired field of view and helps to achieve a maximum brightness of the focal spot (106) as well as a maximized power rating. An advantage of the invention consists in an enhanced image quality compared to conventional rotary anodes as known from the prior art.

The present invention provides a display device and a method of driving the same. The display device includes: a light-emitting device; a first capacitor connected between a first contact point and a second contact point; a driving transistor including an input terminal connected to a first voltage, an output terminal, and a control terminal connected to the second contact point; a first switching transistor controlled by a first control signal and connected between a data voltage and the first contact point; a second switching transistor controlled by a second control signal and connected between a second voltage and the first contact point; a third switching transistor controlled by a third control signal and connected between the second contact point and the second voltage; a fourth switching transistor controlled by the first control signal and connected between the second contact point and the output terminal of the driving transistor; and a fifth switching transistor controlled by the second control signal and connected between the light-emitting device and the output terminal of the driving transistor.

The present invention presents a bionic automatic vision and line of sight control system and method, wherein the system comprises multiple camera sets, wherein each camera set comprises one or more parallel camera with different shooting range, wherein each camera set is driven by one or three actuators, capable of rotating in two or three degree of freedom. The present system is capable of fast object positioning, high accuracy tracking and wide range compensation for line of sight deviation caused by the movement of the system. More specifically, the system can ensure two camera sets to position and track the same object at the same time. The present system not only can be used in various fixed places to monitor, protect and care taking, it can also be installed on various moving objects, such as cars, airplanes, boats, military equipments, and it can be used as eyes for various types of robots.

An air-fuel ratio control apparatus is applied to an internal combustion engine including a variable lift mechanism wich changes a lift amount of an intake valve. An oxygen sensor, wich outputs a signal indicating an oxygen concentration in exhaust gas, is provided downstream of an exhaust gas purification catalyst in an exhaust passage of the internal combustion engine. Air-fuel ratio control is performed to correct the fuel injection amount command value using the correction amount that is set based on the value output from the oxygen sensor. The relationship among the deviation of the correction amount from its reference value, the learned small lift value, the learned medium lift value, and the lift amount is learned. The learned deviation value is calculated based on the lift amount, using the learned relationship. Then, the fuel injection amount command value is corrected by the correction amount including the calculated learned deviation value.

A downhole crystal-based clock that is substantially insensitive to the factors that cause frequency deviation. The clock may be maintained at a predetermined temperature using a temperature sensing device and a heating device, where the predetermined temperature corresponds to the temperature at which the crystal experiences only slight frequency deviation as a function of temperature. A microprocessor may monitor the clock and compensate for long-term aging effects of the crystal according to a predetermined algorithm. The predetermined algorithm may represent long-term aging effects of the crystal which were derived by comparing the crystal clock to a more accurate clock (e.g., an atomic clock) prior to placing the clock downhole. In this manner, the crystal-based clock may be substantially free from the factors that cause frequency, and therefore time variations.

A system, method and an article of manufacture to provide more accurate magnetic tape servo operation are disclosed. Accurate measurements of the width of the servo pattern written on the magnetic tape are accomplished in the presence of relatively large motion of the magnetic tape. The accurate measurements of the width of the servo pattern are used to produce a corrected position error signal that provides improved servo track following to maintain the tape head at an optimal alignment for writing and reading data tracks on the tape.

The invention provides a Hanning self-multiplying convolution window FFT tri-spectrum line interpolation harmonic analysis method. The method comprises the steps that 1, a voltage signal and a currentsignal are acquired according to the sampling frequency; 2, a Hanning self-multiplying convolution window function is applied to the voltage signal and the current signal separately, and FFT transform is conducted on the voltage signal and the current signal to obtain a corresponding voltage spectrum and a corresponding current spectrum; 3, maximum spectrum lines at detected peaks of fundamentalwaves and harmonic waves of the voltage spectrum and the current spectrum and amplitude values of two spectrum lines adjacent to each maximum spectrum line are detection separately; 4, amplitude values, phases and frequencies of the fundamental waves and the harmonic waves of the voltage spectrum and the current spectrum are calculated; and 5, electric energies and a total electric energy of the fundamental waves and the harmonic waves of the voltage spectrum and the current spectrum are calculated. According to the Hanning self-multiplying convolution window FFT tri-spectrum line interpolation harmonic analysis method, the calculation precision on the electric energy of the fundamental waves and the harmonic waves can be improved, and the calculation stability of an electric energy measurement algorithm can be improved.

There is provided a laser processing apparatus, a multilayer printed wiring board manufacturing apparatus, and a manufacturing method to form via holes of ultra-fine diameter. The laser beam from the CO₂ laser oscillator (60) is converted to the shortened wavelength beam by a tellurium crystal (94) to control diffraction of the laser beam. Simultaneously, when the laser beam is condensed, a limit value of the condensation limit is reduced. Thereby, the spot diameter of laser beam is reduced and a hole for via hole is bored on the interlayer insulation resin on a substrate (10). Therefore, even when the laser beam output is raised to form a deeper hole, the hole diameter is not widened and thereby a hole for a small diameter via hole can be formed.