摘要:
A motor control apparatus includes a target acceleration setting unit, a control unit, an acceleration upper limit estimation unit, a mode switching unit, a detection unit and a trajectory setting unit, wherein the mode switching unit controls the target acceleration setting unit to execute a first setting processing, in which the target acceleration at each time point is set corresponding to a first target acceleration trajectory in which the target acceleration at each time point is set corresponding to a first target acceleration trajectory, a second setting processing in which a target acceleration is set corresponding to the acceleration upper limit, or a third setting processing in which the target acceleration is set corresponding to the second target acceleration trajectory, based on the acceleration upper limit, the target acceleration, the speed of the motor.
摘要:
A motor control device includes a measurement unit, a speed control unit, a correction unit, a drive unit, and a disturbance suppressing unit. During a time period before a measurement value of speed of one of a motor and a driven object which is driven by the motor measured by the measurement unit becomes greater than zero the correction unit corrects a manipulated variable such that a reduced correction amount which is from zero percent to less than 100 percent of a correction amount determined by the disturbance suppressing unit, is added to the manipulated variable determined by the speed control unit corresponding to a target speed of the one of the motor and the driven object.
摘要:
A first determining section determines whether a recording medium is conveyed in a first direction. A setting section sets a first current value as a current initially outputted to a DC motor each time the first determining section determines that the recording medium is conveyed in the first direction. A first current outputting section outputs a current at the first current value, and subsequently outputs by steps a current gradually higher than the first current value motor until the first determining section again determines that the recording medium is conveyed in the first direction. A second determining section determines whether the recording medium is conveyed in a second direction opposite the first direction after the first current outputting section outputs a current at the first current value. A first updating section updates the first current value to a second current value higher than the first current value, when the second determining section determines that the recording medium is conveyed in the second direction.
摘要:
There is provided a transporting system including two rollers to transport a sheet, two driving devices to drive the rollers, two measuring devices, and a controller to control the transport. The controller includes two estimating units to estimate values R1 and R2 related to reaction forces act on the rollers, a first calculating unit to calculate a control input U1, a second calculating unit to calculate a control input U2 in accordance with a deviation between a target value and (R1−R2)/2, first and second drive controllers to input a control signal in accordance with U1 and U2 to the first and second driving devices, and a setting unit. In an initial stage of a period in which the sheet is transported by the two rollers, the setting unit sets the target value to a value greater than that of the target value after the initial stage.
摘要:
A motor control device comprises: a motor control unit; and a signal output unit, wherein the motor control unit controls a motor based on an output signal of the signal output unit, wherein the motor control unit is configured to function as: a first control unit performs a first motor control, in which a current upper limit is estimated based on a rotation speed of the motor and is input to the motor, a second control unit performs a second motor control, in which a second driving current, which is a driving current lower than the first driving current at the end of the first motor control is input, a third control unit performs a third motor control, in which a third driving current to be input to the motor is determined, and a switching unit that sequentially switches the first, second, and third control units.
摘要:
A motor control device includes: a motor control unit; and a signal output unit, the motor control unit includes: a first control unit configured to estimate a current upper limit value on the basis of the rotation speed of the motor and a current decrease caused by back electromotive force, the first control unit configured to determine a control input corresponding to the estimated current upper limit value, and a second control unit configured to determine a control input to be applied to the motor on the basis of an operation amount of the motor and a target value of the operation amount to control the motor, and in the early period of driving of the motor, the motor is controlled by the first control unit, and in the late period of driving of the motor, the motor is controlled by the second control unit.
摘要:
A motor driving device, which drives a DC motor, includes a motor driving unit, a status determination unit, and an initial value renewal unit. The motor driving unit repeatedly performs a change-over, wherein the motor driving unit changes an amount of a current inputted into the DC motor to an initial value at a predetermined timing, and then gradually increases the amount of the current from the initial value, in order to slowly move a driving target, driven by rotational force of the DC motor, in a moving direction. The status determination unit determines whether or not the driving target is in a predetermined status. The initial value renewal unit changes the initial value when the status determination unit determines that the driving target is in the predetermined status.
摘要:
A motor control device of the present invention includes a correction input unit, a measurement unit, a first signal processing unit, and a second signal processing unit. The correction input unit corrects a control input signal outputted from a controller, and inputs a corrected control input signal into a motor. The measurement unit measures a physical quantity resulting from rotation of the motor corresponding to a control output. The first signal processing unit inputs a measurement signal representing the physical quantity inputted from the measurement unit into an inverse model 1/G of a transfer function G of a controlled object, and filters an output of the inverse model 1/G through a first low-pass filter. The second signal processing unit obtains a corrected control input signal to be inputted into the motor by the correction input unit, and filters the control input signal through a second low-pass filter.
摘要:
An adaptive control device includes an identifier and a feedforward controller. The identifier estimates an unknown coefficient in a discrete-time transfer function model of a controlled object to identify the discrete-time transfer function model. Estimation is performed based on a manipulated variable supplied to the controlled object and a controlled variable of the controlled object to the given manipulated variable. When estimating each coefficient of the discrete-time transfer function model, the identifier estimates a single unknown coefficient in numerator in non-expanded form of the numerator.
摘要:
An image forming apparatus includes a recording head which jets ink droplets, a head transporting mechanism which transports the recording head, and a control unit which controls the head transporting mechanism to reciprocate the recording head along a transporting path and controls the recording head to form an image on a sheet by jetting the ink droplets when the recording head passes over an image formation area within the transporting path. When the control unit controls the transporting mechanism to transport the recording head toward a turn-around point in the transporting path, the control unit decelerates the recording head in accordance with a first acceleration profile and a second acceleration profile which has a peak of deceleration higher than that of the first acceleration profile.