The invention provides an embedded fast-knife servo device. The embedded fast-knife servo device comprises an air floatation device and a motor, wherein the air floatation device comprises a shell, anair floating shaft shell and an air floating block are arranged in the shell, the air floating block is arranged outside the air floating shaft shell, the motor is arranged in the air floating shaftshell, the motor comprises a rotor and a stator, the stator is arranged in the rotor, the rotor is respectively connected with the air floating shaft shell and a knife handle connecting piece throughthe rotor connecting piece, the knife handle connecting piece is connected with the knife handle, an air pipe joint is arranged outside the shell, and the air pipe joint communicates with the air floating block. The device is small in machining difficulty, compact in overall structure and small in size, and greatly improves the applicability, achieves the function of adjusting and guiding the motor through the air floating shaft shell, avoids the radial movement of the motor during operation, improves the precision of a moving part, and further improves the surface quality of a machined workpiece.

Embedded fast-knife servo device

The present invention provides an electrical vortex sensor output curve high-precision calibration linearity optimization method, belonging to the technical field of detection, and relates to a linearity optimization method for improving the electrical vortex sensor output feature curve calibration precision. The method comprises the steps of: employing a high-precision displacement motion platform and a computer server to perform matching measurement of a displacement value measured by an electrical vortex displacement sensor and output voltage information to obtain an output feature curve ofthe electrical vortex displacement sensor; establishing a sensor sensitivity optimization function under a specified range requirement to allow the output range of the sensor to meet requirements; and performing weight optimization based on medium-range and end-range sensor measurement values, establishing an optimization function, and repeatedly optimizing the linearity of the output curve. Thefeature curve is calibrated to meet the required linear output features so as to achieve the electrical vortex sensor high-precision calibration linearity optimization process. The method improves thecalibration linearity of the feature curve so as to effectively solve the problem that the displacement measurement is not accurate caused by calibration errors, and the method is simple and easy tooperate.

Electrical vortex sensor output curve high-precision calibration linearity optimization method

The invention provides a method and device for assembling multi-stage parts of large-scale high-speed rotary equipment based on a BP neural network, and belongs to the technical field of mechanical assembly. According to the method, the actual structural characteristics of an engine are considered; assembly phases are taken as a control variable; under the conditions of two-section balance and maximum rotating speed, the influence of the extensional rigidity and the flexural rigidity of assembly contact surfaces between the rotors is considered; the high-speed response parameters are changed through the rotating assembly phase; when the optimal assembly phase is selected, the high-speed vibration response amplitude parameters are obtained by solving a system dynamics equation so that the high-speed response amplitude parameters can be optimal after the multi-stage rotors are assembled; and then optimizing the high-speed response of the multi-stage rotors of the aeroengine is achieved.The device comprises a base, an air floatation shaft system, a centering and inclination adjusting workbench, a precision force sensor, a static balance measuring platform, a left upright post, a right upright post, a lower left transverse measuring rod, a lower left telescopic inductance sensor and the like.

Method and device for assembling multi-stage parts of large-scale high-speed rotary equipment based on BP neural network

The invention provides a large-range high-precision micro contact force displacement measurement device and a control method thereof, and relates to a high-precision displacement detection device anda control method. A rotor of a voice coil motor is connected with one end of an air flotation guide rail movable part, a stator of the voice coil motor is connected with an air flotation guide rail base, a hollow cavity is formed in the right upper end of the air flotation guide rail base, the air flotation guide rail movable part is slidably arranged in the hollow cavity of the air flotation guide rail base, a grating scale is connected with the air flotation guide rail movable part, and a number reading head is connected with the air flotation guide rail base; the head end of a piezoelectricceramic executor is connected with the other end of the air flotation guide rail movable part, the tail end of the piezoelectric ceramic executor is connected with a micro force sensing probe, and amonitoring assisting microscope is connected with a fixed base of the piezoelectric ceramic executor. The large-range high-precision micro constant force displacement measurement device is used for measuring large-range high-precision micro contact force, and geometric variables like the size, the shape and the precision of a millimeter scale precise part and assembly can be subjected to nondestructive measurement with nanometer precision.

Large-range high-precision micro contact force displacement measurement device and control method thereof

The invention discloses a coordinate system calibration device and a coordinate system calibration method for a columnar part measuring instrument. The coordinate system calibration device comprises amain body portion of the columnar part measuring instrument, and a laser head portion based on a laser displacement sensor. A precision turntable component comprises a precision turntable protectivecover, a precision turntable, a three-jaw chuck and a standard ring. A two-dimensional guide rail component comprises a horizontal electric guide rail, a horizontal slide, a horizontal motor, a steelframe, a vertical motor, a vertical electric guide rail and a vertical slide. The laser head portion sequentially comprises the laser displacement sensor, a laser displacement sensor adapter plate, atwo-dimensional angle adjustment plate, a laser displacement sensor supporting plate, a manual two-dimensional sliding table, a left side reinforcing rib, a right side reinforcing rib, an L-shaped supporting plate and threaded through holes from top to bottom. The coordinate system calibration device and the coordinate system calibration method can effectively eliminate coordinate system calibration errors caused by manufacturing errors and installation errors, improve the measurement precision of the columnar part measuring instrument, and ensure the reliability of the columnar part measuringinstrument.

Coordinate system calibration device and method for columnar part measuring instrument

The invention discloses an inductive sensor calibration method and device for the eddy current sensor straightness compensation, and belongs to the technical field of precision measurement. The calibration method and device take a dual-frequency laser interferometer as a motion reference, a DC motor and a ball screw as macro motion drive elements, a ball guide rail as a macro motion guide element, and a linear grating scale as a macro motion feedback element for macro motion rough positioning; and adopt a voice coil motor as a micro motion drive component, an air-floatation guide rail as a micro motion guide element, and the dual-frequency laser interferometer and the linear grating scale as micro motion feedback elements for micro motion fine positioning to compensate for a macro motion positioning error. Four eddy current sensors are used to compensate the pitch and yaw errors of a macro and micro positioning platform. The contradiction between the travel and precision of the displacement sensor calibration device can be effectively solved, and the dynamic and static calibration of the large-travel and high-precision inductive displacement sensor is realized.

Inductive sensor calibration method and device for eddy current sensor straightness compensation

The invention provides an assembling measuring method and an apparatus of large-scale high-speed revolution equipment based on tolerance regulation and control, and belongs to the mechanical assembling technology The large-scale high-speed revolution equipment is fixed on an air-bearing rotary table, a lower radial reference inductive transducer and an upper radial reference inductive transducer at the lower side measure radial reference surfaces of the large-scale high-speed revolution equipment, determines the fitting center of circle of the two reference surfaces, and regards the fitting center of circle as the geometric axis of the large-scale high-speed revolution equipment, the large-scale high-speed revolution equipment is adjusted so that the geometric axis and the axis of the air-bearing rotary table are overlapped, a radial measuring inductive transducer and an axial measuring inductive transducer at the upper side extract measuring surface profile data of the large-scale high-speed revolution equipment, and the control of the coaxiality after assembling is realized based on translation and rotation of a matrix According to the method and the apparatus, the function of assembling guidance can be effectively realized, the assembling quality of the large-scale high-speed revolution equipment is improved, vibration is reduced, and the performance of the large-scale high-speed revolution equipment is improved

Assembling measuring method and apparatus of large-scale high-speed revolution equipment based on tolerance regulation and control

The present invention provides a Monte Carlo technique based geometrical tolerance distribution method for large high-speed rotary equipment, and belongs to mechanical tolerance distribution technology. The method comprises: analyzing a propagation process of positioning and orientation tolerances of radial and axial measurement planes of large high-speed rotary equipment; determining a propagation relationship of center coordinates after n-level equipment assembly; obtaining relationships between equipment eccentricity and positioning and orientation tolerances and rotation angles of rotors of each level after the assembly; creating radial eccentricity and axial perpendicularity data of the large high-speed rotary equipment of each level according to a Monte Carlo method; drawing a distribution function to solve a probability density function; and obtaining a probability relationship between radial eccentricity and an axial perpendicularity tolerance of the large high-speed rotary equipment of each level and a final coaxiality tolerance of the multi-level equipment, thereby implementing tolerance distribution of the large high-speed rotary equipment.

Monte Carlo technique based geometrical tolerance distribution method for large high-speed rotary equipment

The present invention provides a probability density technology based geometrical tolerance distribution method for large high-speed rotary equipment, and belongs to mechanical tolerance distribution technology The method comprises: analyzing a propagation process of positioning and orientation tolerances of radial and axial measurement planes of large high-speed rotary equipment; determining a propagation relationship of center coordinates after n-level equipment assembly; obtaining relationships between equipment eccentricity and positioning and orientation tolerances and rotation angles of equipment of each level after the assembly; obtaining probability density of a coaxiality tolerance of the n-level equipment according to a target function of the coaxiality tolerance; and finally, obtaining a probability relationship between radial eccentricity and an axial perpendicularity tolerance of the large high-speed rotary equipment of each level and a final coaxiality tolerance of the multi-level equipment, thereby implementing tolerance distribution of the large high-speed rotary equipment

Probability density technology based geometrical tolerance distribution method for large high-speed rotary equipment

The invention discloses a macro and micro combined method and device for calibrating an inductive displacement sensor, and belongs to the technical field of precision measurement. The calibration method and device take a dual-frequency laser interferometer as a motion reference, a DC motor and a ball screw as macro motion drive elements, a dual V-shaped groove guide rail as macro motion guide element, and a capacitive sensor and the dual-frequency laser interferometer as macro motion feedback elements for macro motion coarse positioning; and adopt a piezoelectric ceramic displacement stage for micro motion positioning to compensate for a macro motion positioning error. Four eddy current sensors are used to compensate the pitch and yaw errors of a macro-micro positioning platform. According to the invention, the contradiction between the travel and precision of the device for calibrating the displacement sensor is solved, and the dynamic and static calibration of the large-travel and high-precision inductive displacement sensor is realized.

Sun Chuanzhi

Papers

Inductive sensor calibration method and device for eddy current sensor straightness compensation

Assembling measuring method and apparatus of large-scale high-speed revolution equipment based on tolerance regulation and control

Monte Carlo technique based geometrical tolerance distribution method for large high-speed rotary equipment

Probability density technology based geometrical tolerance distribution method for large high-speed rotary equipment

Macro and micro combined method and device for calibrating inductive displacement sensor