53results about How to "Small disturbance torque" patented technology

The invention discloses a vehicle-mounted magnetic suspension flywheel energy storage system with a torsional gyroscopic effect suppression. The system comprises a five-degree-of-freedom magnetic bearing, a flywheel rotor and an outer rotor motor which are coaxially arranged, wherein the middle section of the flywheel rotor is a flywheel rotor main cylinder, the lower section is a lower end circular ring, the external part of the upper section of the flywheel rotor is an upper end circular ring, the middle of the upper section is an inner receiving pole, the lower section is a lower end circular ring, the inner receiving pole is of a hemispherical structure, the inner diameter of the upper end circular ring is greater than the inner diameter of the lower end circular ring, the diameter ofthe inner receiving pole is less than the inner diameter of the lower end circular ring, a circular ring-like groove is formed among the flywheel rotor main cylinder, the inner receiving pole and theupper end circular ring, the five-degree-of-freedom magnetic bearing is arranged in the circular ring-like groove, a cylindrical groove is formed between the flywheel main cylinder and the lower end circular ring, and the outer rotor motor is arranged in the cylindrical groove. The system is supported by adopting the unilateral highly integrated five-degree-of-freedom magnetic bearing, which reduces the axial size and suppresses the torsional gyroscopic effect.

The invention which relates to a double-rail double-drive-based three-beat double-workpiece bench exchange apparatus and a method thereof belongs to the technical field of semiconductor manufacturing equipment. The apparatus is characterized in that: the apparatus comprises workpiece benches which operate on a prealigned station and an exposure station; the prealigned station and the exposure station are respectively provided with a well type driving unit which comprises a two side X-directional liner motion unit and a two side Y-directional liner motion unit; two Y-directional transitional liner motion units are arranged between the two well type driving units; and the bench replacement of the double-workpiece bench is completed through the butt joint of the Y-directional liner motion unit and the X-directional liner motion unit. According to the invention, the two workpiece benches are driven in the prealigned station and the exposure station in a dual side mass center mode, so the system angle rigidity is increased; only three beats are needed to exchange the two workpiece benches between the prealigned station and the exposure station, so the lithography efficiency is improved; and the apparatus has the advantages of small motion inertial, short stable time, large structure rigidity and the like in the concrete embodiment process.

The invention discloses a three-degree-of-freedom spherical hybrid magnetic bearing with an axial self-loop. An outer axial stator, an upper annular permanent magnet, a radial stator, a lower annularpermanent magnet and a lower axial stator sequentially coaxially sleeve a rotator from top to bottom, each of the upper axial stator and the lower axial stator is formed by axially connecting an upperdisc, a middle disc and a receiving disc, the inner end surface of every upper disc extend radially inwards extends to form a conical disc, small discs are arranged between the upper and lower end surfaces of the rotor and the corresponding conical discs, the small discs are closely attached to the upper and lower surfaces of the corresponding conical discs, the upper small disc is located abovethe upper end surface of the rotor, and the lower small disc is located below the lower end surface of the rotor; and axial air gaps are left between the upper and lower small disks and the end surface of the rotor, and a control magnetic flux enters the receiving discs through return air gaps to axially form the self-loop without mounting a pushing disc, so the rotating speed of the rotor is optimized, and coupling of axial and radial magnetic fields is reduced.

The invention relates to a high-precision attitude control method combining magnetic control and jet control with labor-saving. The steps are: (1) calculate the expected control torque by using the PID control law according to the three-axis attitude error and the angular velocity error; (2) calculate the expected control torque according to the geomagnetic induction The real-time distribution of the intensity vector in the three-axis coordinate components of the satellite body coordinate system determines which axis attitudes implement magnetic control and which axis attitudes implement jet control; (3) use the small disturbance magnetic moment distribution algorithm to calculate the three-axis magnetic moments to fully satisfy the magnetic control The desired control torque of the shaft, while reducing the disturbance torque generated by the magnetron; (4) Using the jet phase plane algorithm to calculate the jet pulse width of the jet control shaft. The attitude control of the present invention has high accuracy, low working medium consumption, simple calculation and easy engineering realization.

The invention discloses a coaxial counter-rotating geomagnetic energy storage and release energy delivery ground experiment system, which includes a supporting through shaft and a magnetic moment generating device, and a first target delivery component and a second target delivery component are installed on the supporting through shaft for coaxial rotation. Two target delivery components, the first target delivery component and the second target delivery component are used for the installation and release of the delivery target; its working method is that the first target delivery component and the second target delivery component are configured After receiving the signal of starting rotation of the magnetic moment generating device, the support shaft is used as the rotation axis to rotate in the opposite direction, and when the linear velocity at the delivery target reaches the linear velocity set by the system, the first target delivery component or the second delivery component The two-target delivery component releases the delivery target. The present invention adopts the method of two sets of delivery devices coaxially counter-rotating, which can overcome the air resistance moment in the ground experiment and remove the restriction of the upper limit of the target linear velocity, so that it can be better used for the verification of the ground principle of the geomagnetic energy storage method.

A rotationally modulated axial spherical pure electromagnetic bearing, mainly comprising: an upper stator core, a lower stator core, an upper axial bearing coil, a lower axial bearing coil, a rotor, an upper axial air gap, a lower axial air gap, and a stator It consists of a mounting plate, a rotation modulation rotor bearing sleeve, a rotation modulation bearing, a rotation modulation rotor lock nut, an ultrasonic motor rotor, an ultrasonic motor stator, a rotation modulation stator bearing sleeve and a rotation modulation stator lock nut. Since the stator of the axial spherical pure electromagnetic bearing is driven by an ultrasonic motor, the rotation of the stator is realized, so it has a rotation modulation function, so it can eliminate the gyro drift caused by the rotation of the gyro rotor, and greatly improve the detection when it realizes the angular rate detection precision.

The invention relates to an electric propulsion expansion and thrust direction adjustment mechanism, and relates to the field of spacecraft propulsion adjustment. The electric propulsion expansion andthrust direction adjustment mechanism comprises a mounting bottom plate, an elastic expansion joint, a first expansion arm, locking mechanisms, a single-degree-of-freedom revolute joint, a second expansion arm, a double-degree-of-freedom revolute joint and a thruster mounting plate. The axial end of the first expansion arm is fixedly connected with the upper surface of the mounting bottom plate through the elastic expansion joint, the locking mechanisms are fixedly mounted on the lower surface of the first expansion arm, and the single-degree-of-freedom revolute joint is fixedly mounted on the other axial end of the first expansion arm. The axial end of the second expansion arm is connected with the first expansion arm through the single-degree-of-freedom revolute joint, the double-degree-of-freedom revolute joint is fixedly mounted on the other axial end of the second expansion arm, and the double-degree-of-freedom revolute joint is fixedly connected with the lower bottom surface ofthe thruster mounting plate. According to the electric propulsion expansion and thrust direction adjustment mechanism, the backup capability of an electric thruster is improved, and the consumption ofa propellant under the condition of fault ignition is reduced; and at the same time, the efficiency of the electric thruster to maintain the north-south position can be improved.

The invention discloses a vacuum cleaner high-speed brushless DC permanent magnet motor comprising a shafting assembly, a stator assembly, and a drive controller. The shafting assembly comprises a rotating shaft, bearings, blades, and a magnet. The stator assembly comprises a stator, armature windings, a guide bar, and a motor base connected with the guide bar. The rotating shaft is connected with the motor base through the bearings. The magnet is installed at one side, near the stator, of the rotating shaft, and the blades are installed at the other side. The stator is formed by splicing armature tooth blocks, and is provided with stator slots and positioning holes. The stator slot of each armature tooth winds the corresponding armature winding. The stator is connected through the positioning holes with the guide bar for and is thus fixed. The stator is formed by splicing and combining more than three armature teeth. The motor base is provided with a center hole which is internally equipped with a bearing chamber in which the bearings are arranged. The motor base is connected with the rotating shaft through the bearings.

The invention discloses a load simulator based on a follow-up moment load, comprising an elastic force application assembly, a framework assembly, a connecting rod assembly and a torque measurement assembly, wherein the elastic force application assembly, the connecting rod assembly and the torque measurement assembly are arranged on the framework assembly. The elastic force application assembly is used for loading pre-applied force with different gradients on a piece to be detected; the framework assembly is used for loading the follow-up moment load on the same platform; the connecting rod assembly is used for realizing force / torque effective transmission; and the torque measurement assembly is used for effectively measuring the loading torque of a piece to be detected and the rotating angle in the connecting rod assembly. The load simulator is load equipment containing a spring assembly, and the torque load requirements with the different gradients of the piece to be detected are achieved through adjusting the pre-tightening force of a spring through a screw lever. If the load spring cannot meet the requirements, the load spring is replaced by a spring with a different rigidity, and the hanging point of a first connecting rod is replaced so as to realize the torque load requirements with the different gradients. Furthermore, the load simulator can be used for detecting the dynamic rigidity and the static rigidity of the output end of the piece to be detected.