44 results about "Stewart platform" patented technology

The invention discloses a high-precision three-degree-of-freedom attitude adjustment platform for a spectrometer, which is based on a simplified design of a Stewart platform and comprises a movable platform, a static platform and a three-degree-of-freedom driving mechanism connected between the movable platform and the static platform. The driving mechanism is composed of three sets of servo electric cylinders, telescopic rods and servo motors and is driven by a ball screw, and posture adjustment of the platform is achieved. According to the platform, a laser interferometer is adopted as a high-precision sensor, a closed-loop feedback control system is combined, and submicron displacement measurement and attitude control are achieved. The platform can achieve translation in the Z-axis direction and rotation around the X axis and the Y axis, the rotation angle can reach + / -15 degrees, and the precision can reach 0.02 mm. According to the invention, the device ensures high precision and stability in a complex working environment, has the characteristics of stable movement, quick response, easy maintenance and the like, and is suitable for the fields of optical experiments, spectral analysis and attitude adjustment and error compensation of precise instruments.

The invention discloses a hierarchical cooperative motion control method for a ship dynamic positioning and wave compensation embarkation system. The method comprises the following steps: acquiring historical motion data of a ship; the historical motion data of the ship are fused, and the current ship posture and speed are obtained; the prediction model generates a predicted value of the disturbance of the ship in the future preset time; extracting to obtain a low-frequency slow drift motion component; the total output force of the thruster is calculated, and the ship dynamic positioning system controls the thruster to work based on the total output force of the thruster so as to compensate the low-frequency slow drift motion component; a Stewart platform in the wave compensation embarkation system controls supporting legs to work based on the target lengths of the supporting legs so as to compensate low-frequency motion left after compensation of the ship dynamic positioning system and high-frequency motion which is not compensated; and residual disturbance after the Stewart platform is compensated is compensated through the gangway ladder. According to the invention, an energy distribution mode that low-frequency disturbance is compensated by a ship dynamic positioning system and high-frequency disturbance is compensated by a wave compensation embarkation system can be realized.

The invention provides a ship motion prediction and compensation method based on domain adaptive transfer learning, and aims to solve the prediction and compensation problems of rolling motion of a service workboat in offshore wind power construction under complex sea conditions. According to the method, ship rolling angle data are collected in real time through a sensor, and time similarity quantitative division is carried out on the data to divide the data into source domain motion data and target domain motion data. And then, processing the data by using a domain adaptive transfer learning model, and predicting ship rolling motion at a future moment. The prediction result and actual data are subjected to inverse kinematics solution to obtain the expansion and contraction amount of the six electric cylinders of the Stewart platform, the expansion and contraction amount is fed back to a ship control system, the ship attitude is adjusted in real time, and the operation safety and efficiency are improved. According to the method, model parameters can be dynamically adjusted according to feature differences under different sea conditions, the prediction precision is remarkably improved, the method is suitable for rolling motion prediction and compensation under variable sea conditions, and improvement of the safety and stability of SOV operation is facilitated.

The invention discloses an automatic alignment system and method based on machine vision and a Stewart platform, and solves the problems that in an existing alignment method, human errors exist in interpretation of relative positions of a light spot center and a reticle center; the problem that the final intervisibility field of implosion diagnosis cannot be accurately obtained due to the fact that the alignment precision is limited and the alignment efficiency is low and the position deviation between the light spot center and the reticle center cannot be quantified after alignment is completed is solved. In the invention, the laser is used for emitting laser to form light spots on the front and rear differentiation plates, the relative position relation between the optical axis and the axis of the through sight hole is established, then the Stewart platform kinematics model is solved, the target object is directly adjusted to the corresponding pose through the Stewart platform, iterative adjustment is not needed, and the method has the advantage of high alignment efficiency; the center of the light spot is recognized in a machine vision mode, and compared with a traditional alignment method, the method has the advantages of being high in recognition precision and good in consistency.

The invention provides a three-axis vibration sensor correction method and device based on a Stewart platform, and belongs to the technical field of sensor correction. The method provided by the invention comprises the steps of collecting a laser spot motion sequence image of a Stewart platform and a three-axis output voltage sequence of a three-axis vibration sensor; calculating a three-axis excitation displacement sequence based on the laser spot motion sequence image; calculating a three-axis excitation acceleration peak value according to the three-axis excitation displacement sequence; fitting the three-axis output voltage sequence based on a sine approximation method to obtain a three-axis voltage peak value; calculating the sensitivity of the three-axis vibration sensor according to the ratio of the three-axis voltage peak value to the three-axis excitation acceleration peak value, determining the bending angle of the Stewart platform, and correcting the sensitivity based on the bending angle. The invention provides a method and a device for correcting a three-axis vibration sensor based on a Stewart platform. The method and the device are used for correcting the sensitivity of a multi-axis sensor.

The invention discloses a mechanical vibration control system configuration parameter optimization method and device based on a rotational symmetry Stewart platform, and belongs to the technical field of vibration control systems. The method comprises the steps of determining performance index requirements of a system and selecting branch chain structures according to the performance index requirements; the method comprises the following steps: selecting configuration parameters according to the characteristics of a rotational symmetry Stewart platform to obtain an optimization object, and constructing spatial vectors and Jacobian matrixes of all branched chains; constructing a simplified geometric model of the platform according to the spatial vector of each branch chain and the geometric parameters of each structure, solving the maximum outer envelope of the platform, and obtaining an optimization target; the condition number of the platform, the output force / torque of the whole platform, the minimum distance between branch chains and the characteristics of the movable table top are obtained, and a constraint function is obtained; on the basis of the penalty function, a fitness function is constructed, and an optimization parameter combination with the minimum fitness function is calculated. According to the method, the optimization result can meet various assembly and arrangement requirements of final real objects, and the engineering feasibility of the optimization design result is greatly improved.

The invention discloses a six-degree-of-freedom vibration simulation system interference detection method based on a generalized Stewart platform. The method comprises the following steps: determining an interference detection structure; regarding a to-be-detected structure as a cylinder, and obtaining configuration parameters, geometric parameters and interference information of the to-be-detected structure; and detecting the to-be-detected structure according to a preset rule and obtaining a detection result. Wherein the interference detection structure must comprise an actuating branch chain; the configuration parameters of the to-be-detected structure must uniquely and completely describe the central axis vector and starting point information of the to-be-detected structure; the geometric parameters comprise the maximum radius and the height of the to-be-detected structure; the interference information needs to be reasonably arranged in combination with the space required by actual installation; the preset rule comprises the distance between the cylinders. According to the invention, the spacing of each structure can be detected in the theoretical design stage of the vibration simulation system, and the situations of structural interference and insufficient mounting spacing are avoided, so that the theoretical design result has high engineering feasibility.

The invention discloses a structural parameter optimization method of a Stewart platform, and belongs to the technical field of parallel robots. The method comprises the following steps: firstly, establishing a mathematical model of a Stewart platform, carrying out degree-of-freedom analysis on the platform, and establishing a kinetic equation based on a positive and inverse kinematics relationship and a Lagrange method; then determining an optimization target which covers a working space, rigidity, motion precision and stability; on this basis, a particle swarm optimization (PSO) algorithm is adopted to carry out global optimization on key parameters such as branch length, platform layout, driver position and the like, and a fitness function is utilized to comprehensively evaluate platform performance; and finally, inputting an optimization result into finite element analysis (FEA) and multi-body dynamics simulation (MBD) software for verification. Experimental results show that the working space of the Stewart platform can be remarkably expanded, the motion precision and rigidity of the Stewart platform are improved, stress distribution is improved, and the overall stability is enhanced. The method breaks through the limitation of traditional empirical design and single-target optimization, has the advantages of high optimization efficiency, high global search capability and high convergence speed, is suitable for scenes such as flight simulators, precision machining and spaceflight test platforms, and has wide engineering application value.

Embodiments of the invention provide a control method and apparatus, and an electronic device. The method comprises the steps of determining current information of a Stewart platform; the current information comprises a current pose and the rod length of each rod; inputting the current information into a prediction model to obtain adjustment information of the Stewart platform; wherein the prediction model is a network model obtained by optimizing a radial basis function network through a particle swarm optimization algorithm; control information of the Stewart platform is determined according to the adjustment information; and adjusting the current information according to the control information.

The invention discloses a multi-rotor manned flight simulator based on a Stewart platform, and belongs to the technical field of rotor unmanned aerial vehicles. The multi-rotor manned flight simulator based on the Stewart platform comprises a rotor unmanned aerial vehicle body, the rotor unmanned aerial vehicle body comprises a rack, first servo motors and folding propellers, and four sets of servo motors are symmetrically and fixedly distributed on the side face of the rack; the three-degree-of-freedom parallel mechanism comprises a fixed platform, a movable platform and driving branch chains, the fixed platform is fixedly connected to the lower side of the rack, and the fixed platform and the movable platform are hinged through a plurality of driving branch chains; the driving branch chain comprises a second servo motor, a ball screw and a telescopic rod. The second servo motor is fixedly connected to the lower side of the fixed platform and connected with the ball screw through a coupler. And the manned cabin is rotationally connected to the lower portion of the movable platform and used for bearing passengers, and the stability and riding comfort of the cabin are remarkably improved by means of the active control characteristic of the Stewart platform.

The invention relates to the field of ships, in particular to a platform wave compensation analogue simulation method based on UDP (User Datagram Protocol) communication, which comprises the following steps of: constructing a Stewart platform model consistent with an entity platform as an upper platform through simulation software, additionally constructing a platform model as a lower platform, and inputting a wave model for dynamic analogue simulation; calculating and analyzing to obtain compensation data of an upper platform driving electric cylinder; generating a corresponding control signal for driving an electric cylinder on the basis of the compensation data, transmitting the control signal to an entity platform through UDP communication, and receiving actual sea condition wave feedback data of the entity platform; and constructing a new wave model according to actual sea condition wave feedback data, and repeating the above steps. The characteristics of low delay and high transmission efficiency of UDP communication are applied to Stewart platform wave compensation analogue simulation, and a complex and low-efficiency communication process in a traditional analogue simulation process is avoided, so that the real-time response speed of the platform is improved.

The invention provides a Stewart platform self-stabilization control method and device and electronic equipment, and relates to the technical field of automatic control. The system is applied to a Stewart platform and comprises an upper platform, a lower platform, a camera, a visual calibration plate and a first inertial measurement unit, the camera and the first inertial measurement unit are installed on the upper platform, the visual calibration plate is installed on the lower platform, and the visual calibration plate and the camera are oppositely arranged. The Stewart platform self-stabilization control method comprises the following steps: acquiring a visual image of a visual calibration board through a camera, and determining a first real-time state of an upper platform according to the visual image; acquiring a second real-time state of the upper platform through the first inertial measurement unit; determining real-time state information of the upper platform according to the first real-time state and the second real-time state; and when the lower platform moves, adjusting the upper platform according to the movement information of the lower platform and the real-time state information of the upper platform. According to the invention, the real-time performance and the control precision of the Stewart platform are improved.

A joint structure that connects a first component and a second component of a robot has a Stewart platform capable of controlling the relative position and / or angle of the second component with respect to the first component. The Stewart platform has: a first member joined to the first component; a second member joined to the second component; a plurality of legs connecting the first member and the second member; a drive mechanism that changes the effective length of each leg in order to change the relative position and / or angle of the second member with respect to the first member; and a flexible mechanism that elastically changes the effective length of the legs when an external force acts on the second member and restores the effective length of the legs when the external force is removed.

The application relates to a wave compensation system modeling and pose control method based on a Stewart platform, which comprises the following steps: step 1, performing dynamic analysis on a shipborne Stewart platform and obtaining a force balance equation; step 2, calculating the action of a gangway mechanism on the upper platform of the Stewart platform; step 3, expanding the force balance equation based on the action of the gangway mechanism on the upper platform of the Stewart platform, and then establishing a dynamic model of the shipborne Stewart platform considering the gangway; and step 4, designing a Stewart platform pose controller based on a backstepping method to control the pose of the Stewart platform. Compared with the prior art, the application has the advantages of improving the precision of wave compensation and improving the pose control precision.

The invention provides a method and device for repairing a nickel-based alloy turbine blade through surface nickel plating-laser additive synergistically, and belongs to the technical field of part repairing, the device comprises an electroplating or chemical plating module and a laser printing module; the electroplating or chemical plating module comprises a turbine blade clamping assembly and a nickel plating assembly; the turbine blade clamping assembly comprises a two-degree-of-freedom mechanical arm, a first turbine blade clamping piece is installed on the two-degree-of-freedom mechanical arm, a turbine blade containing groove and a baffle containing groove are formed in the first turbine blade clamping piece, a baffle is inserted into the baffle containing groove, and a screwing nut is installed on the baffle. The laser printing module comprises a shell, a six-degree-of-freedom stewart platform is installed on a base at the bottom in the shell, and a second turbine blade clamping piece is installed on the six-degree-of-freedom stewart platform; and a free-form surface fitting module is mounted at the top of the shell. According to the method, repairing defects such as cracks and holes are eliminated, the interface bonding strength is remarkably improved, and the method has the important significance of reducing the cost and saving scarce resources for repairing the turbine blade.

A production assembly for precise handling comprising a Stewart platform holding a production tool, a telescopic hoisting unit and a gantry assembly connected to the Stewart platform.

The problem addressed by this invention, a cooperative operation method for a serial-parallel hybrid space operating system, is as follows: For the dynamic pose tracking problem of a robotic arm on a moving base during on-orbit operation, a serial-parallel hybrid operating system consisting of a 6-DOF serial robotic arm and a Stewart platform is proposed. The Kane method is used to perform dynamic modeling of the serial-parallel hybrid operating system, analyzing the coupling relationships between the various actuators to obtain explicit dynamic equations. Then, an impedance controller is designed based on these dynamic equations to achieve compliant control of the serial-parallel hybrid operating system. Finally, an IMU located at the end of the serial robotic arm is used to sense the actual attitude of the serial section and compare it with the target attitude to obtain the attitude error. After inverse kinematics solution, the attitude error is compensated using the Stewart platform fixed at the end of the serial robotic arm, achieving more precise attitude tracking.

The application provides a large-aperture spliced reflecting surface and a splicing and assembling method thereof, and comprises the following steps: applying a six-degree-of-freedom Stewart platform to attitude adjustment in the splicing process of upper, lower, left and right petals of the reflecting surface; the upper, lower, left and right petals of the reflecting surface are respectively parked on the Stewart platform through adjustable support tools; high-precision pose fine adjustment in the splicing process of the upper, lower, left and right petals of the reflecting surface is realized through the movement of the Stewart platform; a multi-laser tracker is used to form a multi-edge measurement system to measure the pose deviation between the petals of the reflecting surface; the pose deviation is solved as a Stewart platform pose control quantity; the Stewart platform drives the upper, lower, left and right petals of the reflecting surface to perform attitude adjustment; the surface shape after splicing is measured through a laser radar non-contact measurement; and the "assembly-measurement-adjustment" is iterated and approximated for multiple times until the splicing and assembling precision of the reflecting surface reaches the design requirement.

The invention discloses a vehicle test platform based on a six-degree-of-freedom parallel robot and a working method of the vehicle test platform, and belongs to the technical field of vehicle test. The vehicle test platform comprises a gradient adjusting mechanism, a platform lifting mechanism, a fixed platform, a sliding table moving mechanism, a Stewart platform group and a raining mechanism; the slope adjusting mechanism, the platform lifting mechanism and the fixed platform are sequentially arranged on the bottom plate, one end of the sliding table moving mechanism is located in the fixed platform, the sliding table moving mechanism is slidably connected with a Stewart platform set, and the Stewart platform set limits wheels of a to-be-tested vehicle. According to the invention, a comprehensive test platform capable of completing eight types of tests of vehicle centroid measurement, rollover, vibration, road bumping, variable-speed driving, collision, raining and climbing can be constructed, and simulation and execution of various test conditions are realized by using the multi-degree-of-freedom motion capability and a modular structure of the Stewart platform group, so that the test efficiency is remarkably improved, and the test cost is reduced. And integration and multi-functionalization of vehicle research and development and testing are realized.

The invention discloses a Stewart platform jacobian matrix calculation method, which belongs to the technical field of robot kinematics, and comprises the following steps: respectively establishing an inverse kinematics model of UPS-Stewart and a position inverse kinematics model of UPRU-Stewart; according to the inverse kinematics model of the UPS-Stewart and the inverse kinematics model of the position of the UPRU-Stewart, the relative angular velocity of the branch chains of the UPRU-Stewart platform is established; and according to the relative angular velocity of the branch chains of the UPRU-Stewart platform, a Jacobian matrix of the URPU-Stewart platform is obtained. According to the method, the passive helix of the UPRU or UPU branch chain is compensated, and the effects that the calculation process is simple and visual, and the calculation result is accurate and reliable are achieved.

The utility model discloses a Stewart platform-based tool-change-free cutting reduction processing device, which comprises a shell, a tool-change-free cutting reduction processing device, a tool-change-free cutting reduction processing device, a tool-change-free cutting reduction processing device, a tool-change-free cutting reduction processing device and a tool-change-free cutting reduction processing device, the Stewart platform mechanism is arranged in the machine shell; the multiple machining tool mechanisms are arranged in the machine shell and can be alternately used, and the multiple machining tool mechanisms are evenly distributed on the peripheral side of the Stewart platform mechanism so as to carry out cutting reduction machining on a workpiece fixed to an upper platform of the Stewart platform mechanism; and the operation table is fixed to the shell wall of the machine shell, and the operation table is electrically connected with the Stewart platform mechanism and the machining cutter mechanism. In the machining process, different machining tool mechanisms can be alternately used, machining of different technologies on workpieces is achieved, frequent tool changing operation of operators is avoided, the machining efficiency is improved, and the machining safety is improved. In addition, a Stewart platform is used for replacing a traditional machining platform, and the device has the advantages of high precision, multiple degrees of freedom, platform stability, flexibility and adaptability.

The present invention discloses an active vibration isolation method based on a Stewart platform, comprising: based on the kinematic and dynamic models pre-established for the Stewart parallel platform, collecting the posture signal of the upper platform at the current moment and the displacement and velocity signals of each leg; calculating the required displacement and velocity of each leg through an inverse kinematics algorithm according to the posture signal of the upper platform and the expected posture quaternion; calculating the displacement and velocity errors of each leg and performing nonlinear processing; dynamically correcting the control gain of the S-NPD motion controller to obtain the corrected proportional gain and differential gain of each leg at the current moment; for each leg, the nonlinear processing results of the displacement error and the nonlinear processing results of the velocity error and the corrected proportional gain and differential gain of the leg at the current moment are input into the S-NPD motion controller to obtain the control force; repeating until the preset number of moments is accumulated and then stopping. The present invention can ensure that the upper platform remains relatively stable when the lower platform is subjected to different disturbances, and achieve good control.

The application relates to a six-freedom-degree strain sensing device suitable for Stewart platform feedback, which comprises an upper platform, an upper sensing unit, a lower sensing unit, a mounting frame, a lower platform, a first piezoelectric actuator, a second piezoelectric actuator, a third piezoelectric actuator, a fourth piezoelectric actuator, a fifth piezoelectric actuator and a sixth piezoelectric actuator; the upper platform is in the shape of a hexagon composed of three equal-length short sides and three equal-length long sides, and the short sides and the long sides are arranged at opposite positions; the upper sensing unit is connected with the upper platform; the lower sensing unit passes through the upper sensing unit sleeve and is connected with the upper platform through the upper end of the lower sensing unit sleeve; the mounting frame is composed of an upper annular mounting interface, a mounting frame first branch leg arranged in the shape of a Chinese character 'pin' under the annular mounting interface and presenting a 30-degree angle with the vertical direction, a mounting frame second branch leg and a mounting frame third branch leg. The application realizes high-precision six-freedom-degree adjustment, driving and sensing integration of the load.

A capture system attachable to a servicer spacecraft for capturing and controlling a space object includes three triangular arm assemblies. Each triangular arm assembly is independently controllable and includes a cross brace and two linear actuator struts, attached together at one end to form an apex, and connected with the cross brace via joints at the opposing end. The triangular arm assembly further includes an end effector, connected with the two linear actuator struts at the apex. The capture assembly is maneuvered to the space object to enable the end effector to grapple onto a feature of the space object without a priori knowledge of a specific shape of the feature of the space object. An associated method is also disclosed.

The invention relates to a parallel type six-degree-of-freedom moving in-place milling and grinding robot which comprises a working platform and a moving platform which are connected through three identical moving branch chains and have two operation modes of a milling and grinding working state and an in-place moving state. In a milling and grinding working state, the movable platform is a static platform, and the working platform is a movable platform; in the in-place moving state, the moving platform is a movable platform, and the working platform is a static platform. The robot is simple in structure, and the six-degree-of-freedom effect of the end effector can be achieved through the three movement branch chains. And the method has relatively high flexibility and relatively high precision, and can meet operation requirements in a complex environment. Compared with a traditional six-degree-of-freedom parallel robot such as a Stewart platform, the six-degree-of-freedom parallel robot has better kinematics analysis capability and better stability, and is suitable for various application scenes with high precision and dynamic performance requirements.

The invention discloses large-space 3D printing equipment and method based on a rope-driven Stewart parallel mechanism, the equipment comprises a three-degree-of-freedom rope-driven parallel mechanism, the three-degree-of-freedom rope-driven parallel mechanism comprises three stand columns, and distributed winch sets are arranged on the side walls of the upper portions of the stand columns; a rope retracted and released in the distributed winch group is connected with the printing actuator, large-range space movement of the printing actuator is achieved, and the printing actuator comprises a Stewart platform and a printing spray head assembly; the method comprises the following steps: connecting a printing actuator through a rope; the length change required by each rope is solved, and a printing actuator is driven to move at three degrees of freedom; performing six-degree-of-freedom high-precision attitude adjustment; and executing the 3D printing task. And printing is completed under large-range movement and accurate posture adjustment. According to the invention, the printing space is obviously enlarged, the overall rigidity and stability are improved, and high-precision printing of medium and large complex structural parts is realized.

The invention relates to medicine and can be used for treating severe polytrauma and complex fractures, for example, of the tibia long bone. A robotized system for the closed reduction of a fractured femur comprises a system of actuators based on a Stewart platform, a working member assembly, Schanz pins, a perineal post, and a controller with software. The Stewart platform is mounted on a floor plate via a vertical column. The linear actuators are arranged between a base plate and an end effector having a C-shaped ring. The two ends of the actuators are connected by hinges to the base plate and the end effector, respectively. The Schanz pins are secured to mounting blocks which are fastened by round-head screws and wingnuts. The perineal post is mounted on a base plate via a vertical column. The post is connected to two additional links. An O-shaped ring of the perineal post is connected to the C-shaped ring by a trapezoidal steel ring. A Schanz pin is mounted on a steel block such as to be capable of holding a proximal fragment in place during the reduction process. The invention results in precise traction forces and the optimal alignment of bone fragments.

The invention relates to a six-degree-of-freedom parallel platform with high bearing capacity, the six-degree-of-freedom parallel platform mainly comprises a six-degree-of-freedom platform and an air cylinder system for providing additional force, the Stewart platform mainly comprises an upper platform, a lower platform, six electric cylinders and a hinge mechanism, and the six electric cylinders are hinged to the upper platform and the lower platform. One end of each electric cylinder is universally connected to the lower platform through a hinge mechanism, the other end of each electric cylinder is universally connected to the upper platform through a hinge mechanism, every two electric cylinders form a group, and each group of electric cylinders are arranged in a splayed shape, so that the movement of the six-degree-of-freedom platform is realized; the air cylinder system for providing extra force comprises three air cylinders and an air pump for providing air pressure, the three air cylinders are located on a main machine in the center of the platform, one end of each air cylinder is fixed to the lower platform, and the other end of each air cylinder is connected to the center of the upper platform. The problem that an existing six-degree-of-freedom platform is insufficient in high-load application is effectively solved.

The invention belongs to the technical field of intervertebral disc simulation testing, and particularly relates to an intervertebral disc and intervertebral disc prosthesis multi-degree-of-freedom coupling loading testing method and device based on a Stewart platform. Comprising an upper seat and a lower seat, a plurality of actuating arms are arranged between the upper seat and the lower seat, each actuating arm is connected with a driving unit, and the driving unit is connected with a control unit; a sensor and an upper clamp are mounted on the lower surface of the upper seat, and the upper clamp is used for clamping an upper cone of the intervertebral disc prosthesis; the sensor is electrically connected with the control unit and is used for detecting load data; a telescopic adjusting shaft is mounted on the upper surface of the lower seat, and a lower clamp is mounted at the other end of the telescopic adjusting shaft and used for clamping a lower cone of the sample; according to the multi-degree-of-freedom coupling loading test device for the intervertebral disc and the intervertebral disc prosthesis based on the Stewart platform, six-degree-of-freedom coupling loading test and characterization can be carried out on the intervertebral disc and the intervertebral disc prosthesis, the result is accurate, the device is simple, and the cost is low.

The invention provides a large-caliber spliced reflecting surface and a splicing and adjusting method thereof, and the method comprises the steps: applying a six-degree-of-freedom Stewart platform to the posture adjustment in the splicing process of an upper part, a lower part, a left part and a right part of the reflecting surface, and enabling the upper part, the lower part, the left part and the right part of the reflecting surface to be parked on the Stewart platform through an adjustable supporting tool, high-precision position and posture fine adjustment in the splicing process of an upper petal, a lower petal, a left petal and a right petal of the reflecting surface is achieved through movement of the Stewart platform, then a multilateral measurement system is formed through multiple laser trackers, position and posture deviation between the petals of the reflecting surface is measured, the position and posture deviation is calculated as the position and posture regulation and control quantity of the Stewart platform, the Stewart platform is controlled to drive the upper petal, the lower petal, the left petal and the right petal of the reflecting surface to carry out posture adjustment, and the position and posture adjustment precision of the reflecting surface is improved. The spliced surface type is measured in a non-contact mode through a laser radar, and multiple times of iterative approximation through installation, measurement and adjustment are carried out till the splicing and assembling precision of the reflecting surface meets the design requirement.