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

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.

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.

The present method operates an electrically controlled pneumatic (ECP) brake system that includes a system controller and a plurality of ECP devices on a train, in a semi-active mode between an active mode and an in active mode. The method includes setting the system controller to the semi-active mode if the ECP brake command is release; and setting the released ECP devices to the inactive state by the system controller when entering the semi-active mode. The ECP devices are set to an active state and to apply the brake by the system controller in response to an ECP brake command of apply. The ECP devices are reset to release and then to the inactive state by the system controller in response to an ECP brake command of release.

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 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 present invention relates to a speed adjustment method, a speed adjustment device, a computer apparatus and a storage medium. The method includes the following steps that: a speed adjustment request is received, wherein the speed adjustment request carries speed information, wherein the speed information contains a target adjustment speed or a speed adjustment coefficient; a current time update parameter is obtained according to the speed information; a first point selection period is obtained according to the current time update parameter and a preset point selection period; and the firstmovement distance of a movement device is calculated according to the first point selection period and first planned information corresponding to a current point selection time, so that the movementdevice can be made to move according to the first movement distance, wherein the first planned information contains a first planned speed or a first planned distance. With the above method adopted, time for speed adjustment is decreased, and the real-time performance of the speed adjustment is improved.

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.

A control system (200) arranged for a rotary compressor driven by a rotary engine, and includes: a first control subsystem (210), a second control subsystem (220) and a selector (230); the first control subsystem (210) is arranged to provide a first control signal (26) as a function of the performance (21) of the compressor; the second control subsystem (220) is arranged to provide a second control signal (27) as a function of the speed (22) of the compressor; the selector (240) is arranged to select the first control signal (26) or the second control signal (27) as a third control signal (24)to be provided to a power control input of the engine.