48results about "Speed/accelaration control with auxillary non-electric power" patented technology

A control moment gyroscope (CMG) framework control system and a CMG framework control method for restraining dynamic unbalance disturbance of a rotor are provided. A feed-forward compensation module and an algorithm switching module are embedded on the basis of a double-loop PI control system. In preset Ng control cycles, the whole framework control system is set to a PI control mode; in each control cycle from the (Ng+1)th control cycle, the speed precision of a CMG framework in the current control cycle is calculated through the algorithm switching module, and whether there is a need to switch the control mode of the current control cycle is determined; if the control mode is a feed-forward compensation mode after switching, subtraction operation is carried out on a moment reference value output by a speed loop PI controller and a fed-back torque of a framework motor to get the mechanical torque error e(j+1) of the current control cycle, and the feed-forward compensation module calculates the current feed-forward compensation value Delta i(qref, j+1) of the current control cycle according to e(j+1) and adds Delta i(qref, j+1) to the double-loop PI control system; and if the control mode is a PI control mode after switching, current feed-forward compensation is blocked, and control is performed according to the double-loop PI control system.

The invention relates to an intelligent control system for automatic cutting formation of tunneling, comprising a space position detecting device of a cutting head, a current sensor of a cutting motor, a programmable controller, a proportional amplifier and a load-sensitive proportional multi-path reversing valve set, wherein the programmable controller is used for carrying out arithmetical operation on signals collected by the space position detecting device of the cutting head to control the cutting head to move along the set track in the stated range of a tunnel so that a regular section is cut. The current sensor of the cutting motor is used for collecting the current signals of the cutting motor to compare with rated current, the opening sizes of the valve ports of the load-sensitive proportional multi-path reversing valve set is controlled by the programmable controller to correspond to the constant-power pulling speed of the cutting motor with different coal properties so that the automatic formation control on the section of the tunnel and the intelligent control on the constant-power pulling speed of the cutting motor are realized. The invention is suitable for automatic cutting formation of the section when the tunnel of a coal mine and an engineering tunnel are tunneled by a cantilever type tunneling machine.

The invention discloses a gyro-stabilized platform for a high-speed rolling carrier and a control method thereof. The platform body is provided with a stabilized object and a gyroscope; the gyroscope measures the angular motion information of the platform body; an encoder measures the information of a rotor of a servo motor relative to a stator of the servo motor; and a servo drive controller analyzes the angular motion state of the platform body relative to a reference plane according to the angular motion information, performs space vector transformation on current by use of the angle information provided by the encoder and the phase current of the servo motor detected in real time according to a PID control strategy, and controls the output torque of the servo motor to counteract the corresponding rotation of the platform body. The gyro-stabilized platform disclosed by the invention is applied to a high-speed rolling carrier, and can accurately ensure the attitude reference in severe operation conditions.

The invention relates to one motor inverse device and its control method wherein, its device can rapidly trace its load according to its size and motor rotation speed to modify its set value through judging the motor rotation stability. The method comprises the following steps: dividing the load range and testing the motor current change to determine its direct operation steps and direction according to the load and gas gate to adjust the motor gate into pre-set position.

The invention discloses a speed control device for a holder camera. The device comprises an instruction reception unit used for receiving a rotation instruction for driving the holder camera to rotate, a displacement calculation unit used for calculating a displacement distance of the holder camera from the present position to a target position according to the rotation instruction, a speed querying unit used for querying a pre-stored speed and an acceleration model according to the displacement distance to acquire a motor rotation speed, and a driving control unit used for sending the motor rotation speed acquired through querying to a motor control end of the holder camera to drive the holder camera to rotate to the target position. Through the device, jittering of the holder camera can be eliminated to a great degree at relatively low cost.

The invention relates to a variable-parameter PID (proportion-integration-differentiation) control circuit and a variable-parameter PID control method for an electric steering gear, which belong to the technical field of automatic control. The PID control circuit comprises a filtering circuit, a PID circuit, an adding circuit, a deviation judgment circuit and an on-off switching circuit, wherein the deviation judgment circuit is used for controlling on and off of two groups of output of an analog switch in the on-off switching circuit by means of a deviation value of input signals and feedback signals of an electric steering gear closed-loop system, so that whether a parallel resistor and a parallel capacitor are inputted into the PID circuit or not are controlled, and online adjustment of PID parameters is realized. By the aid of the variable-parameter PID control circuit and the variable-parameter PID control method, the problem that the electric steering gear of an aviation guided weapon is difficult to achieve good control effect with a group of preset PID parameters in the working environment of great inertia, nonlinearity, strong interference and the like. The variable-parameter PID control circuit is reasonable in design, simple and feasible, is capable of effectively weakening systematic buffeting, increasing systematic robustness and improving control precision, and can guarantee the system to have good control quality in different control phases.

The control method of a wind turbine generator increases the speed range of wind turbine generators, maximising the operation and efficiency thereof, in addition to lengthening their service life, on minimising the extreme and fatigue loads to which the wind turbine generators are subject, and which are due mainly to the stops and disconnections thereof as a result of strong gusts of wind. More specifically, the control method of the present invention stands out essentially for being based on the control of the reactive current circulating through the electric generator, said reactive current control being carried out in accordance with the rotational speed (ω_g) for the purpose of reducing the voltage at the converter terminals on the generator side, or rotor voltage (V_R), which ultimately allows a transitional increase in the speed range of the wind turbine generator.

The invention discloses a vertical balanced robot. The vertical balanced robot comprises a robot body. The robot body is internally provided with an accelerometer, a gyroscope and a control unit integrated with a stepping motor driving unit. Two wheels are arranged on two sides of the lower end of the robot body. The robot body is internally provided with two groups of stepping motors. Moving arms are arranged on two sides of the robot body. The control module obtains an angle value and an angular velocity value by carrying out filtering and calculation based on measured values of the accelerometer and the gyroscope. PD controlling is carried out based on the angle value and the angular velocity value so as to generate two output values used for controlling the rotation of the motors. The stepping motors are controlled by the stepping motor driving unit. According to the invention, the vertical balancing of the robot is precisely controlled by controlling the rotation of the two motors; the robot is integrally in a human shape, so that a bionic shape effect is achieved; the control module is integrated with the stepping motor driving unit, a conventional large motor driver is not needed, the size of the robot itself is reduced, and the power consumption is lowered; in addition, by means of further configuration, the robot can be provided with an entertainment function.

The invention discloses an acceleration compensation control method of a suspension floating object follow-up system and a mode-selection-based control method of the suspension floating object follow-up system, and belongs to the field of suspension floating object follow-up systems. The acceleration compensation control method and the mode-selection-based control method aim at solving the problem that a controller designed for follow-up platform driving with a traditional method can not be directly used for motor rotation speed control modes. The acceleration compensation control method of the suspension floating object follow-up system includes the four steps of firstly establishing kinematical and dynamical equations, determining a motor control mode of the suspension floating object follow-up system, designing a controller and adjusting parameters. The problems that in the traditional method, driving force F<x> and driving force F<y> serve as control items, only a torque model can be adopted for a motor, and the performance can not be sufficiently developed; the requirement of the motor for the control mode of the motor is lowered, the performance of the motor is better developed accordingly, and the control performance of the suspension floating object follow-up system is improved. The acceleration compensation control method and the mode-selection-based control method are suitable for the field of the suspension floating object follow-up systems.

The invention relates to a variable inertia reaction flywheel. A flywheel shaft is linked with a flywheel outer ring by virtue of a guide bar; the flywheel shaft is arranged on a support by virtue of a deep groove ball bearing; the support is fixed on a left shell; a drive motor is fixed on the left shell, and the shaft of the drive motor is linked with the flywheel shaft by virtue of a flat key, so as to drive the flywheel to rotate; the guide bar is provided with a balancing weight which can slide along the guide bar; the flywheel shaft is provided with a guide rod of which the axis is superposed with the axis of the flywheel; the guide rod is provided with a slide block; the slide block is linked with the balancing weight by virtue of a connecting rod; the other end of the slide block is linked with a lead screw by virtue of a deep groove ball bearing; a right shell and a left shell are oppositely fixed; a through screw rod motor is arranged on the right shell; the lead screw motor drives the lead screw to do spiral movement; the lead screw drives the slide block to slide along the guide rod, so as to drive the balancing weight to slide along the guide bar, and thus the rotary inertia of a flywheel mechanism is adjusted; the counter torque output by the variable inertia reaction flywheel is controlled by controlling the angular speed of the drive motor and the angle of revolution of the lead screw motor.

A control system is disclosed for controlling operations of a primary driving unit and a secondary driving unit in a web winding machine system to provide tension control over a continuous web of material. The control system enables the primary driving unit to operate in a speed mode to set a linear speed of the continuous web of material. The control system receives an input from a tension and speed detector in the web winding machine system, the tension and speed detector detects tension and a speed of the continuous web of material, and enables the secondary driving unit to operate in a modified torque-adjusted closed-loop tension control mode, so as to control the tension in the web of material. The control system enables the secondary driving unit to operate in the torque-adjusted closed-loop tension control mode and integrates a speed feedback loop into the torque-adjusted closed-loop tension control mode, so as to introduce active damping into tension control.

The invention relates to a piston type speed controller. In order to overcome the defects of large processing difficulty and high manufacturing cost of parts of the traditional piston type speed controller, which are caused by needing to set an outer flow storage chamber, the invention provides a piston type speed controller comprising a flowing medium, a piston, piston rods, a piston cylinder, apiston cylinder tip and a sealing member. The piston type speed controller is characterized in that the piston is provided with two piston rods, through holes or through gaps are arranged on the piston rods, and the through holes or through gaps of the two piston rods are communicated with each other to form medium circulating throttle pipelines; and when the piston is moved, the flowing medium sequentially flows into the through hole or through gap of one piston rod and then flows out and enter the other side of the piston from the through hole or through gap of the other piston rod.

A digital fuzzy controller used on speed regulation clutch of viscous liquid is a speed regulator connected in external with three analog input interfaces, two digital interfaces, two pulse interfaces, RS485 interface, keyboard input and display screen. The said speed regulator uses one pulse interface to input speed signal detected out from driven shaft of speed regulation clutch and uses another pulse interface to input speed signal detected out from driving shaft of said clutch for applying photoelectric rotary coder to measure speed.

A method of operating a motor, the method comprising: operating a motor at a first speed; operating the motor in negative slip; imbalancing at least one phase of the motor to dissipate regeneration energy using windings of the motor; and wherein a next motor speed is decreased to a speed less than the first speed. An apparatus for carrying out the method is also presented.

In order to regulate a power plant (105) having a gas generator (1) and a free turbine (3) to drive a rotary wing, a first speed of rotation (NTL) of the free turbine (3) is regulated on a first setpoint value (NTL*) equal either to a regulation term (NRc) or to a predetermined setpoint threshold (NTL*). The regulation term (NRc) is a function of a third speed of rotation (NR) of said rotary wing in accordance, where NRc=NR*(1−d), “d” representing a non-zero constant lying in the range 0 to 1.

An automatic transmission line pressure regulator includes a first body for installation in a valve bore distant from a line pressure valve and having a threaded bore passing therethrough, a threaded adjuster axially engaged in the threaded bore and rotationally adjustable with respect to the first body, a second body for installation in the valve bore and engagement with the threaded adjuster and a spring for installation between and engagement with the second body and the line pressure valve. Rotation of the threaded adjuster with respect to the first body alters an axial position of the adjuster, the second body and a first end of the spring, thereby altering a pre-load on the spring to alter a resistive force against movement of the line pressure valve caused by line pressure, and thusly, regulates line pressure.