摘要:
A method and a device for network traffic control comprising the following steps: detecting actual downlink traffic of a network device; calculating an error e between the actual downlink traffic and predetermined downlink traffic; performing a calculation on the error to obtain PID output according to a PID control formula; calculating scaling of upstream traffic according to the calculated PID output and the downlink traffic; and regulating an upstream traffic threshold according to the scaling. The upstream traffic is increased or reduced in accordance with the actual downlink traffic be means of the correlated regulation and dynamic control of the upstream traffic and the downlink traffic of the network device. As such, traffic control is realized in those applications (e.g. UDP traffic such as P2P streaming media) which themselves lack the traffic control mechanism, and it is possible to make the best of network bandwidth as well.
摘要:
Provided is a level shift circuit which includes: a first level shift module; a first signal input terminal for providing a first input signal for the first level shift module; a first signal output terminal for providing output from the first level shift module; a second level shift module; a second signal input terminal for providing a second input signal for the second level shift module; a second signal output terminal for providing output from the second level shift module; a drive module connected to the first signal output terminal and the second signal output terminal; and a drive signal output terminal from the drive module. The level shift circuit of the present invention can be applicable for the requirements of BCD process and prevent damages to the high-voltage device due to the excessively high gate voltage.
摘要:
A method and an apparatus for controlling output torque of a motor for an electric vehicle in downhill mode comprises following steps: detecting a tilt angle value θ, a current vehicle speed value V and an accelerator-pedal travel value Gain of the vehicle, determining whether the vehicle is in downhill mode or not, and if the result is positive, then calculating a downhill slip torque T1 of the vehicle under the tilt angle value θ, obtaining a maximum output torque T2, calculating an output torque T of the motor based on T1, T2, Gain and a given vehicle speed delimitative value Vref, and controlling the motor to output the calculated output torque T. The present invention ensures the vehicle speed not too high by controlling the output torque of an electric vehicle in downhill mode, even if the brake-pedal travel is zero.
摘要:
A method and apparatus for determining a vertical and horizontal (X-Y) target shot position on a Liquid Crystal or Plasma display screen may be adapted to connect to commercially available video game console systems. Upon a trigger event from a light gun when it is pointed at the target shot position, a blanking signal renders the monitor black during a first vertical refresh cycle. During a second vertical refresh cycle, the voltage to each of the red, blue and green channels is increased in three separate screen sections to create a display split between the three colours. The light gun is adapted to be capable of separately detecting a blue, red or green light pulse and the X-Y coordinates of the target shot position is determined on the basis of the colour detected by the light gun and the length of time which elapses between the start of the second vertical refresh cycle and the detection of the red, blue or green light pulse.
摘要:
The present invention discloses a method and apparatus for controlling a motor for an electric vehicle. The method and apparatus calculates the current acceleration α of the motor according to the detected rotor position values in real-time, and if the current acceleration α is greater than a predetermined forward acceleration α0, the output torque of the motor is decreased. If the acceleration α is less than a predetermined backward acceleration α1, then the output torque of the motor is decreased. Thus, when the vehicle travels from a normal road surface to a smooth road surface, the decrease or increase output torque may suppress the abrupt speed variations.
摘要:
A method and an apparatus for controlling output torque of a motor for an electric vehicle in downhill mode comprises following steps: detecting a tilt angle value θ, a current vehicle speed value V and an accelerator-pedal travel value Gain of the vehicle, determining whether the vehicle is in downhill mode or not, and if the result is positive, then calculating a downhill slip torque T1 of the vehicle under the tilt angle value θ, obtaining a maximum output torque T2, calculating an output torque T of the motor based on T1, T2, Gain and a given vehicle speed delimitative value Vref, and controlling the motor to output the calculated output torque T. The present invention ensures the vehicle speed not too high by controlling the output torque of an electric vehicle in downhill mode, even if the brake-pedal travel is zero.
摘要:
The present invention provides a hybrid power driving system comprising: a first subsystem designed to input/output power; a second subsystem designed to input/output power; a driving shaft designed to receive power from the first subsystem and/or the second subsystem or output power to the first subsystem and/or the second subsystem; and a tri-stated overrunning clutch designed to connect the first subsystem and the second subsystem, wherein the tri-stated overrunning clutch may be in an overrun state, an engaged state, or a disengaged state. The first subsystem and the second subsystem can comprise an engine, a motor, and a clutch, etc., respectively. In such a hybrid power driving system, when the tri-stated overrunning clutch is in the engaged state, the first subsystem and the second subsystem are coupled to each other and work together. When the tri-stated overrunning clutch is in the disengaged state, the first subsystem and the second subsystem can work separately without any interference to each other. Therefore, the structure is simple and the control is convenient.
摘要:
The present invention provides a clutch engaging control method in a hybrid power output device, wherein the device comprises an engine, a first motor, a clutch and a second motor that are connected in sequence, a battery, and a speed reducing mechanism and a drive shaft that are connected to the output end of the second motor; the method comprises: (a) detecting the rotation speed ω2 of the second motor and setting the rotation speed ω2 as the target rotation speed ω0 of the first motor, when the vehicle is driven by the second motor and the engine is required to be started to provide assistance to the second motor; (b) starting the first motor to drive the engine, and controlling the actual rotation speed ω1 of the first motor to be close to the target rotation speed ω0; (c) switching the state of the first motor from a driving motor to a power generator when the actual rotation speed ω1 of the first motor is approximately equal to the target rotation speed ω0; and (d) engaging the clutch. The method can improve the dynamic response time of the engine and suppress impact in the clutch engaging process. The present invention further provides a clutch engaging control system in a hybrid power output device.
摘要:
A control method of the electromotor comprises: setting a target alternating axis current based on the rotor angular velocity of the electromotor and a target direct axis current based on the torque of the motor; simultaneously detecting three-phase currents and current rotor position angle of the electromotor; converting the three-phase currents to an actual alternating axis current and an actual direct axis current by Park and Clark conversions; inputting the difference between the target current and the actual current to a current loop, outputting the required direct axis current and the required alternating axis current; determining the three phase voltages according to the required direct axis current and alternating axis current and the angle of the electromotor rotor position; obtaining PWM control waveform through three-phase voltages, wherein said PWM control waveform is configured to control the conversion from direct current to alternating current and drives the electromotor.
摘要:
FIG. 1 is a top, front perspective view of a perforated square cover; FIG. 2 is a front elevation view of the perforated square cover; FIG. 3 is a rear elevation view of the perforated square cover; FIG. 4 is a left side elevation of the perforated square cover; FIG. 5 is a right side elevation view of the perforated square cover; FIG. 6 is a top plan view of the perforated square cover; FIG. 7 is a bottom plan view of the perforated square cover; and, FIG. 8 is a top, front perspective view of the perforated square cover with a heating device inserted. The broken lines are for illustrative purposes only and form no part of the claimed design.