4results about How to "Prevent chatter" patented technology

This invention relates to the field of machine tool error compensation technology, and discloses a real-time thermal deformation compensation system and method for machine tool slides and spindle boxes. The system includes: a temperature acquisition module that acquires one-dimensional temperature data of the machine tool and its environment; an image acquisition module that acquires two-dimensional thermal images of the machine tool surface; a data processing module that reduces noise in the data and generates multi-source thermal field data through time stamping and perspective mapping to achieve spatiotemporal alignment; a prediction module that uses a multimodal deep learning algorithm to perform feature fusion calculation and outputs a thermal error prediction vector; and a motion control module that converts the prediction vector into a coordinate correction compensation amount after low-pass filtering and smoothing limiting, and sends it to the CNC system to instruct the feed mechanism to perform reverse displacement compensation. This invention integrates contact and non-contact temperature measurement, supports online fine-tuning to address model error drift, and prevents high-frequency vibration of the CNC feed axis by setting tolerance limits in closed-loop control, thereby improving the machining accuracy and operational stability of the machine tool under complex temperature variations.

The utility model relates to the technical field of rocker arm tools, and provides a rocker arm machining tool which comprises a tool base, a fixing support and a supporting block, the fixing support is installed on the top of the tool base, a rocker arm body is arranged at the front end of the fixing support, a supporting assembly is arranged at the rear end of the rocker arm body, and an upper pressing assembly is arranged at the lower end of the rocker arm body. The rocker arm body is arranged on the clamp core rod in a sleeved mode, primary fixing is achieved through the opening baffle and the tightening screw, and then the rocker arm body is matched with two-way pressing of the limiting pin with the adjustable position and the pressing rod. According to the rocker arm clamping tool, accurate positioning and stable clamping of a rocker arm body can be achieved, it can be guaranteed that the rocker arm is kept stable in the machining process, displacement or shaking of the rocker arm is effectively prevented, the rocker arm clamping tool can be suitable for clamping operation of rocker arms of different sizes, and the applicability of the rocker arm clamping tool is improved.

The application discloses a high-precision PID trajectory tracking control method for a space manipulator, and relates to the technical field of spacecraft control. The method first establishes a dynamic model of the rotating motion of the manipulator containing system uncertainty; a nonlinear disturbance observer is constructed to estimate the unmodeled dynamics and external disturbances of the system in real time; a PID compound controller is designed in combination with the uncertainty estimation value; a PID parameter optimization problem is established with the minimum trajectory tracking error as a target and the joint angle, angular velocity and control torque as physical constraints; the physical constraints are converted into finite-dimensional constraints by using a constraint transcription method, and the gradient of the objective function and the constraints with respect to the PID parameters is calculated, and the optimal PID parameters are solved by an iterative optimization algorithm. The application realizes high-precision trajectory tracking of the free-flying space manipulator by using the compound control architecture and parameter optimization, effectively suppresses system uncertainty, and ensures strict satisfaction of multiple physical constraints, and has good engineering generality.

The application discloses a kind of sprocket production manufacturing automated polishing equipment, belong to drive chain production technical field, the polishing equipment includes polishing workbench, the upper end of polishing workbench is equipped with clamping mechanism, the bottom of polishing workbench is detachably connected with first servo motor, the rotating end of first servo motor is detachably connected with the base portion of clamping mechanism, the upper end of polishing workbench is symmetrically arranged with two groups of swing mechanism, swing mechanism is rotatably connected with swing plate, second servo motor is detachably connected with polishing wheel by passing swing plate and being detachably connected with the rotating end of second servo motor, by swing type floating structure replacing traditional linear guide rod telescopic structure, polishing wheel is self-adapting swing with tooth profile around first rotating rod with swing plate, polishing reaction force is transmitted along swing arm axial in polishing process, eliminate lateral component force perpendicular to the direction of motion from the source, avoid the continuous eccentric wear caused by one-side contact of slide and guide rod.