45results about How to "Reduce coupling error" patented technology

The invention discloses a six-dimensional force and torque sensor for measuring large force and small torque of a large mechanical arm. The six-dimensional force and torque sensor comprises a center shaft, a force sensitive element, a base and a strain gage component, wherein the force sensitive element is fixedly connected to the base; the center shaft penetrates through the force sensitive element and the base; the center shaft is in interference fit with the force sensitive element; the strain gage component is attached to the force sensitive element; the force sensitive element comprises four elastic main beams, four elastic auxiliary beams, a regularly octagonal center shaft platform, four fixing platforms, four main floating beams and four auxiliary floating beams; the strain gage component comprises a first strain gage group and a second strain gage group; two opposite elastic main beams in the four elastic main beams are respectively coated with the first strain gage group, and the other two elastic main beams are respectively coated with the second strain gage group; and the center shaft is in interference fit with a through hole of the center shaft platform. The six-dimensional force and torque sensor can improve the rigidity of measuring the force, and can also slightly improve the rigidity of measuring torque.

The invention discloses a 3-PRR micro-displacement platform based on a symmetrical variable cross-section compliant mechanism, wherein three micro-displacement driving devices are all mounted on a fixed platform; three branch chains connecting a movable platform with the fixed platform are arranged evenly; and in each branch chain, a lever amplification mechanism is connected with the fixed platform through a flexible hinge and a symmetrical trapezoidal compliant mechanism is connected with the lever amplification mechanism through the flexible hinge. One end of the symmetrical folding leaf spring type compliant mechanism is connected with the lever amplification mechanism through the flexible hinge, while the other of the symmetrical folding leaf spring type compliant mechanism is connected with a rigid connecting rod through the flexible hinge; the rigid connecting rod is connected with the movable platform through the flexible hinge; and the movable platform is capable of realizing planar three-freedom degree micro-motion. The symmetrical trapezoidal compliant mechanism of the 3-PRR micro-displacement platform is capable of avoiding incomplete contact of the driving devices when the elastic resistance is as low as possible; as a result, the motion accuracy is improved; and due to the amplification function of the lever amplification mechanism of the 3-PRR micro-displacement platform and the low resistance feature of the symmetrical folding leaf spring type compliant mechanism, large stroke output of the micro-displacement platform can be realized.

The invention relates to a method for leading out the direction of a turning spindle axis of a high-precision swing bench. The method comprises the following steps of: (1) installing and adjusting a special direction leading-out device; and (2) aligning the direction of tested equipment with the axis of the high-precision swing bench. The method for leading out the direction of the turning spindle axis of the high-precision swing bench has a reasonable design and high practicability. In the method, a direction calibration device is designed and the aim of aligning the coordinate system of the tested equipment with the coordinate system of the high-precision swing bench is fulfilled by an indirect method, so that the swing test can be performed smoothly and the output error is reduced.