665 results about "Target angle" patented technology

In a coaxial two-wheeled vehicle, an attitude controller (84) calculates motor torque Tgyr for maintaining a base so that it has a target angle from deviation between base angle command θref serving as attitude command and current base angle θ0 calculated by using a gyro sensor (13) and an acceleration sensor (14). On the other hand, at a position proportional controller (86R), a differentiator (88R) and a velocity proportional controller (89R), there is performed PD control with respect to deviation between rotation position command Prefr of a motor rotor (92R) for right wheel and current rotation position θr of a motor rotor (92R). A current control amplifier (91R) generates motor current on the basis of added value of motor torque which is the control result and estimated load torque T1 calculated by using pressure sensors to drive the motor rotor (92R).

A method, apparatus, and program for computing a path, starting velocity, aim angle, and aim points for directing a putted golf ball from a point on a golf course to another point and incorporating such data into easily read charts or electronic media is provided. The invention also provides a means of determining the initial launch conditions and actual path a putted golf ball traveled on given its starting and ending ball positions.

A multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) system. The radar system includes spatially offset transmitting antennas simultaneously transmitting at least two distinguishable waveform signals and receiving antennas receiving incoming waveform returns for each of the distinguishable waveform signals. The radar system also includes a displaced phase center antenna (DPCA) processing unit adapted to perform processing on the incoming waveform returns, and a synthetic aperture radar processing unit adapted to produce a plurality of spatially-coincident SAR-processed signals. The radar system also generates a plurality of clutter-suppressed signals using the spatially-coincident SAR-processed signals. For each of two MIMO transmissions from spatially displaced transmitters, clutter is cancelled simultaneously in at least two spatially displaced receive channels via DPCA processing. This results in at least two spatially displaced but simultaneous clutter cancelled complex SAR images, which are combined in a monopulse processor to enhance target detection and unambiguously determine target angle.

The present invention provides a light redirecting article for redirecting light toward a target angle, the light redirecting article comprising: an input surface comprising a plurality of light redirecting structures each light redirecting structure having a near surface having two slopes, sloping away from normal in one direction as defined by a first inclination base angle β1, a second inclination angle β2, and a first half apex angle α2, for accepting incident illumination over a range of incident angles and a far surface sloping away from normal, in the opposite direction relative to the input surface, as defined by a second base angle γ1 and a second half apex angle α1. The invention further provides an output surface opposing to the input surface wherein the near and far surfaces are opposed to each other at an angle (α1+α2) that is in the range from 60 to 70 degrees, and the base angle β1 is in the range from 82 to 87 degrees.

A portable electronic device, like a cellular telephone for example, includes software for executing a method for presenting directional indicator information to a user on a display. The device receives geographical information about its location, orientation information of its alignment and geographical information about a landmark of interest. The device then calculates a destination angle relative to the orientation information. The device then presents directional information, for example an arrow, to a user. In one exemplary application, Muslims are able to select Mecca as the landmark of interest. The device then uses information about its own location, the orientation of the device and the location of Mecca to present an arrow on the display indicating the proper direction for the Muslim to align themselves for prayer in accordance with the teachings of Islam.

Radar for detecting and tracking short range airborne targets using a non-scanning beam to illuminate the entire search space, and processing the return signals from a plurality of spaced apart receive antennas. Target angle in one plane may be determined by coherent processing of the returns from the plurality of receive antennas. Spacing the receive antennas apart in three dimensions allows determining of two angles, such as azimuth and elevation. Processing of the returns may be coherent or noncoherent, or returns may be processed both coherently and noncoherently. Programmability of the processing algorithms and parameters provide flexibility in applications, as well as flexibility based on such things as the target type and its range. Exemplary applications are disclosed.

An improved display provides information regarding a projectile trajectory so that a user is informed whether or not there is a clear shot. Such information facilitates accurate, effective, and safe firearm and bow use by providing indications regarding obstacles that are between the shooter and target and which may or may not be in the projectile trajectory. The improved display provides one or more path indicators shown over the cross hairs. In some embodiments the highest point in the projectile trajectory (being a true aim point) is indicated in relation to the visualized target and possible obstacles. An improved rangefinder device generally includes a range sensor operable to determine a first range to a target, a tilt sensor operable to determine an angle to the target relative to the device, and a computing element, coupled with the range sensor and the tilt sensor, operable to determine an accurate projectile trajectory based on the first range and the determined angle. In some embodiments any obstacle in the projectile trajectory is automatically ranged and an indication is provided that the obstacle will interfere with the clear shot. A game display embodiment provides education regarding the technology. Enhanced rangefinders have digital cameras and high-resolution displays. Some embodiments adapt a mobile smart device such as an iPhone with a range sensor to be a high resolution rangefinder with a touch screen, GPS, and video analysis capabilities.

Among other aspects shown and described, a fuel supply apparatus that provides multiple fuel spray targeting angles as a function of fuel pressure towards a combustion chamber of an engine to reduce hydrocarbon emission during cold-start or hot-start. A method and fuel system are also shown and described.

The invention discloses a method for controlling the pointing to the ground of the coaxial antenna of a lunar satellite. The method includes the following steps: first, according to earth ephemeris information transmitted from the ground to the satellite and a transformation matrix from an equatorial inertia system to a coordinate system of a satellite orbit, the ephemeris of the earth in the coordinate system in the satellite orbit in any moment is calculated ; second, according to the calculated ephemeris, visible earth region of the satellite is calculated and within the visible region, a pointing in the coordinate system of the satellite orbit of vector about the satellite pointing to geometer is calculated; the pointing in the coordinate system of the satellite orbit of vector about the satellite pointing to geometer is calculated in a compensated way to obtain the pointing in the coordinate system of the satellite body of vector about the satellite pointing to geometer; according to the pointing in the coordinate system of the satellite body of vector about the satellite pointing to geometer, an antenna target angle is calculated; a final instruction angle is obtained after an antenna zero deviation is compensated and the final instruction angle is sent to an antenna drive mechanism which can drive the antenna to point to the earth. The invention overcomes the defects of the prior art and adopts a tracking mode of a simple ring-opening program to meet the requirements for pointing accuracy.

The invention provides a mechanical arm space trajectory tracking dynamic compensation method and system. The method comprises the following steps: (S1) a terminal pose error delta of a mechanical armis calculated according to a terminal anticipant pose matrix T1 of the mechanical arm and a terminal present pose matrix T0 of the mechanical arm; (S2) a joint target angle q* is calculated by usinga Jacobian matrix J (q), the pose error delta and a present joint angle q under a present terminal pose of the mechanical arm; (S3) a joint target angle speed FORMULA is calculated according to the Jacobian matrix J (q) under the present terminal pose of the mechanical arm and an anticipant speed v* of the terminal of the mechanical arm; and (4) the joint target angle speed FORMULA and an output quantity of a joint position controller are summed to obtain a joint speed instruction to drive each joint of the mechanical arm to move. The method is low in calculating complexity and few in occupiedresource, has no need to consider complicated dynamics models, and is simple, practical and probe to implementation; and each joint target speed is directly obtained through space speed output by terminal trajectory planning as a feedforward quantity without existing hysteresis, so that the instantaneity is achieved.

The invention discloses a wave beam space domain meter wave radar height measurement method based on compressed sensing and relates to low elevation height measurement under the condition that a signal to noise ratio is low and snapshots are less. A realization process is characterized in that a target signal is extracted from a radar echo and rough measurement of the elevation is performed so that the space domain theta where a target signal elevation is located is obtained; the space domain theta is divided into P parts, wave beam formation is performed in the space domain theta so as to obtain a wave beam transformation matrix B and prewhitening is performed on the wave beam transformation matrix B so as to obtain a whitening wave beam transformation matrix T; receiving data is projected to the whitening wave beam transformation matrix so as to obtain a wave beam domain measurement signal z and an observation matrix phi carries out compression sampling on the z so as to obtain an observation signal y; iterative operation of the whitening wave beam transformation matrix T and the observation signal y is used to obtain a target signal estimation value; a target angle is extracted from the target signal estimation value so as to obtain the target height. By using the method of the invention, sampling points of the target signal and operands are reduced; sidelobes of a signal power spectrum and a space spectrum are effectively reduced; height measurement precision under the low signal to noise ratio is increased; the method can be used in target positioning.