95results about How to "Simple drive control" patented technology

A mechanical grasping system that is both simple to fabricate and operate and robust. A multi-fingered hand may be driven by a single actuator, yet can grasp objects spanning a wide range of size, shape, and mass. The hand may be constructed using polymer-based Shape Deposition Manufacturing, with joints formed by elastomeric flexures and actuator and sensor components embedded in tough rigid polymers. The passively compliant, adaptive hand has superior robustness properties, able to withstand large impacts without damage and capable of grasping objects in the presence of large positioning errors, appropriate for use in unstructured and/or human environments.

An active matrix liquid crystal display device has a plurality of unit pixels being arranged in a matrix configuration, each unit pixel being divided into a plurality of subpixels. Each of the subpixels has a subpixel electrode, a pixel transistor connected to the subpixel electrode, and a voltage controlling capacitor connected to the subpixel electrode. A voltage controlling capacitor line for supplying a compensation voltage signal is connected to the voltage controlling capacitor so that after the writing to the subpixel has been completed, the potential of the compensation voltage signal is varied to modulate the potential of the subpixel electrode to be a predetermined voltage, using the voltage controlling capacitor. Such combining of spatial dithering attained by a pixel-dividing technique and a capacitively-coupled driving method eliminates the need for digital-to-analog converter circuits, attains gray scale display based on a digital image signal, and achieves a reduction in power consumption.

A gas-driven chest compression apparatus for cardiopulmonary resuscitation (CPR) comprises a flexible pneumatic actuator, capable of axial contraction when fed with a pressurized driving gas, and means for controlling the contraction thereof. Also disclosed are methods of providing chest compressions to a patient by means of a CPR apparatus comprising actuator(s) of this kind, and a corresponding use of the actuator.

The present invention relates to an easy-to-control tool for minimally invasive surgery and a method for using the same. In accordance with an aspect of the present invention, there is provided a tool for minimally invasive surgery and a method for using the same comprising, a main shaft, a first control shaft and a second control shaft positioned in sequence from one end of the main shaft, a first actuating shaft and a second actuating shaft positioned in sequence from the other end of the main shaft, an adjustment handle positioned around one end of the second control shaft, an end effector positioned around one end of the second actuating shaft, a pitch control part positioned around one position of the positions between the main shaft and the first control shaft, between the first control shaft and the second control shaft, and between the second control shaft and the adjustment handle, for transferring a motion of the adjustment handle in a pitch direction to the end effector, a first yaw control part and a second yaw control part positioned around the other positions of the positions between the main shaft and the first control shaft, between the first control shaft and the second control shaft, and between the second control shaft and the adjustment handle, respectively, for transferring a motion of the adjustment handle in a yaw direction to the end effector, a pitch actuating part positioned around one position of the positions between the main shaft and the first actuating shaft, between the first actuating shaft and the second actuating shaft, and between the second actuating shaft and the end effector, a first yaw actuating part and a second yaw actuating part positioned around the other positions of the positions between the main shaft and the first actuating shaft, between the first actuating shaft and the second actuating shaft, and between the second actuating shaft and the end effector, respectively, and a pitch cable, a first yaw cable, and a second yaw cable for transferring motions from the pitch control part, the first yaw control part, and the second yaw control part to the pitch actuating part, the first yaw actuating part, and the second yaw actuating part.

A method for manufacturing a head suspension is capable of suppressing the dispersion in the vibration control effect of a head suspension and improve productivity, the manufacturing method includes a step of punching, by use of a hollow punch having a tooth portion at a distal end thereof, a vibration damper piece out from a base material having a vibration damper provided detachably on a liner through an attaching surface, to hold the vibration damper piece on a hollow internal surface of the punch, a step of positioning the punch holding the vibration damper piece on an objective portion of a semi-finished head suspension, and a step of attaching, by use of an extruding implement, the vibration damper piece on the objective portion with the attaching surface through extruding the vibration damper piece from the punch.

The present invention relates to a friction drive conveyor including carriers 1, which can be propelled along a track by frictional wheels 30 fitted along the track. Each frictional wheel 30 can be driven by a brakeless motor 29. A sensor 32 senses whether each frictional wheel 30 is in contact with any one frictional surface 15 of the carriers 1. The track includes a section along which the frictional wheels 30 are supported at regular intervals equal to or slightly shorter than the total length L of the frictional surfaces 15 on each side of each carrier 1. On the basis of a signal output from each sensor 32, a controller 24 so controls the associated brakeless motor 29 as to start rotating the associated frictional wheel 30 in contact with any one frictional surface 15 when the forward next wheel 30 gets free of the frictional surfaces 15, and as to stop driving the frictional wheel 30 having got free of the frictional surfaces 15.

The invention discloses a wide input range three-level LLC resonant converter and a level switching control method, and belongs to the technical field of electric power electronic transformation. The inverter is mainly formed by electrically connecting an input direct current voltage source Vin, bus dividing capacitors Cin1 and Cin2, two-way switch tubes S1 and S2, full-bridge switch tubes Q1, Q2, Q3 and Q4, resonant capacitors Cr1 and Cr2, a resonant inductor Lr, a magnetic inductor Lm, a transformer T, rectifier diodes D1 and D2, an output filter capacitor Co and a load Ro. When the inverter works in a three-level mode, the switch tubes S1 and S2 are closed, the switch tubes Q1 and Q3 are simultaneously turned on/off, the switch tubes Q2 and Q4 are simultaneously turned on/off, the switch tubes Q2 and Q4 are complementary to the switch tubes Q1 and Q3, and a duty ratio is fixed as 0.5. When the inverter works in a two-level mode, the switch tubes S1 and S2 are disconnected, the switch tube Q1 and the switch tube Q4 are closed, the switch tube Q2 and the switch tube Q3 are turned on in a complementary way, and the duty ratio is fixed as 0.5. The wide input range three-level LLC resonant converter has the advantages of wide input voltage range, simple circuit topological structure, simple driving control and the like.

A laser device includes: a laser light source which generates a laser light in a pulse waveform of preset predetermined frequency; intensity modulator which is driven with a transmittance waveform wherein transmittance changes at either the predetermined frequency or an integer-multiple frequency thereof and which extracts and outputs the laser light which is outputted from the laser light source; control unit which controls an operation of the intensity modulator; an amplifier which amplifies the laser light which is outputted from the intensity modulator; and a wavelength conversion optical element which converts a wavelength of the laser light which is amplified by the amplifier, wherein the control unit changes relative timing of the transmittance waveform with respect to the pulse waveform, thereby changing the pulse waveform of the laser light which is emitted from the intensity modulator, to output a pulse light of predetermined waveform from the wavelength conversion optical element.

The invention discloses an electric vehicle driving and charging integrated circuit and a torque elimination control method thereof. The electric vehicle driving and charging integrated circuit comprises a power battery, a bidirectional DC/DC converter, a four-bridge arm DC/AC converter, a three-phase motor, an auxiliary inductor, a first conversion contact switch, a second conversion contact switch, a first single-contact switch, a second single-contact switch, an alternating current interface and a control unit. The circuit only adds one auxiliary inductor to realize three-phase input charging, and has the advantages of simple motor driving control, no need of redesign of the motor and high power density. The invention further provides a torque elimination control method of the circuit. Motor torque elimination during charging is achieved through bridge arm parallel control, the inductance value of an auxiliary inductor does not need to be designed to be consistent with the equivalent inductance of a motor stator winding, and the method has the advantage of being high in robustness.

The invention provides a numerical control device and a driving control method. The numerical control device performs controlling in an X-axis direction and a Y-axis direction which are crossed and utilizes motors respectively arranged on each axis for driving a worktable that supports a workpiece. A first wave filter sets a derivative of a frequency of a vibration generated in the X-axis direction to a time constant (T1). A second wave filter sets the derivative of a frequency of a vibration generated in the Y-axis direction to a time constant (T2). The numerical control device smoothes the speed instruction signal of a motor through the first wave filter and the second wave filter, thereby suppressing vibration of the worktable in the X-axis direction and the Y-axis direction.

The invention discloses a two-freedom-degree hybrid stepping motor for bionic eyeballs of a robot. The stepping motor comprises a first freedom degree motor, a second freedom degree motor and output shafts, wherein the first freedom degree motor is of a circular structure with a notch, the second freedom degree motor is of a circular structure with an opening, the notch is matched with the opening, and the planes of the two motors are perpendicularly orthogonal; the first freedom degree motor and the second freedom degree motor both comprise stators and rotors, the stators and the rotors can relatively move in the planes of the motors, and the two-freedom-degree movement of the output shaft of one freedom degree motor can be achieved through respective independent movement of the two freedom degree motors. The two-freedom-degree hybrid stepping motor has the advantages of being simple in structure and manufacture technology, convenient in analysis design, high in mechanical integration level, high in open-loop operation location accuracy, easy in performance experiment test and favorable for shortening the development period of products and improving the performance and the competitiveness of the products.

Provided is a bidirectional switch circuit wherein two switching elements are electrically connected in two directions. Out of the two switching elements (SW1, SW2) connected in series, the switching element (SW1) wherein a reverse direction voltage higher on the source (S1) side than that on the drain (D) side is applied, is configured such that a current can be carried from the source (S1) side to the drain (D) side, even in a state where ON drive signals are not inputted to a gate terminal (G1).

To drive an inkjet printhead having an array of printing elements, where the first and second printing elements which discharge relatively different amounts of ink are arranged on the same array in a predetermined direction, print data for the first or second printing element is serially inputted, the inputted print data is sequentially stored, the stored print data is latched, a selection signal indicative of which of the first or second printing element is to be driven is inputted, a driving signal indicative of a driving period is inputted, and respective printing elements are driven in accordance with the latched print data, the selection signal, and the driving signal. Accordingly, it is possible to reduce the cost of the printhead having plural types of printing elements, which discharge relatively different amounts of ink, and possible to easily control driving of the printhead.

The invention discloses a side sucking type range hood and a fume sucking control method thereof. The range hood comprises a fume collecting hood (1) and a front panel (2) movably mounted in front of the fume collecting hood (1); the fume collecting hood (1) is provided with a fume inlet (10), and the front panel (2) can move relative to the fume collecting hood (1) to be switched between an opening state and a closing state; the side sucking type range hood also comprises a movably arranged fume guiding plate (3) which can move to be in an extending state when the front panel (2) is in the opening state; and under the extending state, at least part of the fume guiding plate (3) forms a brim part in front of the front panel (2) to guide cooking fume into the fume inlet (10). Under the condition of larger cooking fume quantity, the fume guiding plate (3) is driven to move to be in the extending state to improve the fume collecting effect of the side sucking type range hood, therefore, the fume sucking effect of the side sucking type range hood is enhanced, and the purposes of timely sucking away the cooking fume and fast purifying a kitchen environment are achieved.