15 results about "Degrees of freedom" patented technology

A stage system for a lithographic apparatus includes a stage, an over-determined number of actuators to act on the stage, at least two sensors to measure a position dependent parameter of the stage and to provide a respective sensor signal. The at least two sensors are arranged to measure the respective position dependent parameters in a same degree of freedom. A controller is provided to provide a controller output signal to at least one of the actuators in response to a setpoint and the position dependent parameter as measured by at least one of the sensors. A further controller is provided with the position dependent parameters measured by the sensors. The further controller is configured to determine a difference between the position dependent parameters from the sensors and to provide a further controller output signal to at least one of the actuators in response to the determined difference.

The invention discloses a practical flexible cystoscopy surgery auxiliary robot system. The system particularly comprises a robot used for achieving a flexible cystoscope can move at four degrees of freedom; a remote control device and control method which are used for converting the action with multi-degree-of-freedom operation to control signals so as to precisely and synchronously control the execution terminal; a driving plate mechanism which can precisely clamp and control a flexible cystoscope driving plate; the flexible cystoscope matched with various specifications and models and a flexible cystoscope clamping component which can be mounted and dismounted quickly; a support which can assist in supporting the soft part of the flexible cystoscope in cooperative work. According to the system, the surgical flexible cystoscope can be quickly mounted or dismounted on the robot by a doctor to precisely clamp and control the driving plate of the flexible cystoscope, therefore, with the robot arm movement at four degrees of freedom precisely and synchronously controlled by control terminal devices, the precise remote control performed on the flexible cystoscope for a surgery is achieved, the X-ray radiation on site suffered by the doctor is avoided, and meanwhile, the surgical difficulty is lowered, the surgical failures are reduced, and the service life of the flexible cystoscope is prolonged.

The invention discloses a disturbing force compensation method of a two-degree-of-freedom double electro-hydraulic vibrostand array simulation system. The two-degree-of-freedom double electro-hydraulic vibrostand array simulation system comprises a lower platform, a six-degree-of-freedom vibrostand, a two-degree-of-freedom vibrostand, a pier A, a pier B and a bridge board. According to the disturbing force compensation method disclosed by the invention, pressure difference signals of two chambers of hydraulic cylinders in 10 valve-controlled cylinder cylinders and acceleration signals of piston rods of the hydraulic cylinders are collected, and disturbing force compensation signals are obtained by calculation. Driving signals of the valve-controlled cylinder cylinders are adjusted by usingthe disturbing force compensation signals to achieve the purpose of improving the control precision of the array simulation system. By application of the disturbing force compensation method proposedby the invention, the fluctuation 6dB of amplitude-frequency characteristics of a closed-loop transfer function of a rolling degree-of-freedom position in the vicinity of 18 Hz can be reduced within2dB, and the fluctuation 16dB of the amplitude-frequency characteristics of the closed-loop transfer function of a pitching degree-of-freedom position in the vicinity of 35 Hz can be reduced within 4dB, and the control precision of the array simulation system is obviously improved.

A measuring system that relate to the measurement of relatively small one degree of freedom mechanisms, such as pivoting and rotary switches, is disclosed. In particular end effectors and a kit for assembling various end effector assemblies is disclosed, that allow for accurate measurement of torque versus angular displacement curves for various types of pivoting and rotary switches.

The invention relates to a large-stroke five-degree-of-freedom hybrid machine tool with reconfigurable characteristics. The large-stroke five-degree-of-freedom hybrid machine tool comprises a liftingadjusting device, five parallel mechanism driving branched chains with the same structure, a passive constraint branched chain, a movable platform and a spindle head, wherein one ends of the five parallel mechanism driving branched chains with the same structure are connected to the lifting adjusting device, the other ends of the five parallel mechanism driving branched chains are connected to themovable platform, one end of the passive constraint branched chain is connected to the center of the movable platform, the other end of the passive constraint branched chain is connected to the lifting adjusting device, and the spindle head of the machine tool is installed at the tail end of the movable platform. The parallel mechanism part of the hybrid machine tool has three-dimensional movement and two-dimensional rotation, and the processing requirements of complex curved surfaces and surface local bulges of large-size box bodies can be met; the Z-direction motion is superposed by two stages of the lifting adjusting device and the parallel mechanism, a larger Z-direction stroke is achieved, and the processing requirement of a large working space of a box body is met; and meanwhile, the lifting adjusting device can continuously change the structural inclination angle of the parallel mechanism, so that the mechanism has reconfigurable characteristics, and different processing requirements can be met.

The present invention relates to a device and method for controlling the movement of a games character, which enable character movement of a type in which a character in the game jumps down and falls freely from an elevated height following an action by the games player, or progresses forwards in the direction of movement if another action is performed. The present invention has the advantageous effect that the appeal of a game is maximized as the movement time and the movement distance differ depending on the terrain and updrafts in the game even though the degree of freedom for actions is small.

The invention relates to the technical field of micro-nano operation and precision location, in particular to a three-stage displacement amplification flexible precision locating platform with two degrees of freedom. The flexible precision locating platform comprises a base, a movable platform and two three-stage amplification structures which are of the same structure; a piezoelectric ceramic isfixed to the base by a pre-tightening bolt, and a hemisphere of the output end of the piezoelectric ceramic is connected with an arc box on a movable block; the both sides of the movable block are connected with first fixing bases through first parallel blade flexible leaf springs; and each three-stage amplification structure comprises conventional levers, L-type levers and a half-bridge structure. A wire-cutting technology and integral manufacturing are adopted by the whole locating platform, and assembly errors caused by a traditional mechanical device are overcome; the fiction problem of atraditional kinematic pair is solved by adopting a flexible hinge as a transmission pair; by adopting the three-stage displacement amplification structures, the translational output range of the piezoelectric ceramic in the X and Y directions is improved effectively, and the displacement amplification ratio of the three-stage displacement amplification locating platform is far larger than the displacement amplification ratio of a two-stage displacement amplification locating platform.

The invention provides an active suspension regulating system and method and a vehicle. The active suspension regulating system comprises an active suspension system and a control device, wherein thecontrol device is used for regulating the active suspension system based on the change of the driving state of the vehicle so as to provide tilt compensation on at least one degree of freedom; at least partially based on the participation level of a driver under a current driving mode, the control device determines a tilt compensation level; and the higher the participation level of the driver is,the lower the tilt compensation level is. The influence of the change of the driving state of the vehicle on a passenger or the driver is reduced according to the active suspension regulating systemand method and the vehicle.

A digital broadcasting reception device capable of accommodating a plurality of types of substrates having different mounting positions of parts in a common shielding case, having a higher degree of freedom and intended to reduce costs is provided. Inside a digital television is provided a metal shielding case wrapping around a substrate mounted with an electronic part and a detachable separation section in the shielding case. When accommodating a digital substrate having substantially the same size as that of this shielding case in the shielding case, the digital substrate is accommodated as is, and when a digital tuner mounted on the digital substrate which is smaller than this digital substrate exceeds the height of the shielding case, the digital tuner is placed at the position where the separation section is detached from the shielding case.

The invention discloses a six-degree-freedom entire movement restrained system of a floating platform. The six-degree-freedom entire movement restrained system of the floating platform comprises a rotating body set composed of an adjustable latticed tuning liquid column damper and a hollow rotating body with an opening at the bottom which is immerged into water; the adjustable latticed tuning liquid column damper is arranged on a certain layer of deck surface, above the water surface, in the floating platform, an upright pillar is arranged below the deck, a caisson connecting upright pillar is arranged at the bottom of the upright pillar, the top portion of the hollow rotating body with an opening at the bottom which is immerged into water is connected with a rotating arm of a sliding groove, the rotating arm of the sliding groove is provided with the sliding groove for sliding of the rotating body, one end of the rotating arm of the sliding groove is provided with a rotating shaft, and the rotating arm of the sliding groove is arranged on the upright pillar through the rotating shaft. According to the six-degree-freedom entire movement restrained system of the floating platform, the operating cost of a floating platform vibration damper is low, the operation is simple, and the use, installation, disassembly and moving are very convenient; the cost and operating expense are low, and the floating platform vibration damper is suitable for various floating platforms.