Various aspects of the present disclosure are directed to, for example, methods of controlling a rotational speed of a maching. in one example embodiment, the method includes the steps of: generating a rotational speed reference variable for a controller from a rotational speed setpoint value; determining an adapted rotational speed setpoint value which considers a rotation angle actual value and a rotation angle setpoint value determined on the basis of the rotational speed setpoint value; and switching the rotational speed reference variable between the rotational speed setpoint value and the adapted rotational speed setpoint value as a function of the rotational speed.

This overall control device for a testing system comprises: a plurality of resonance suppression controllers that each generate a torque current command signal for suppressing mechanical resonance between a specimen and a dynamometer upon receiving a base torque current command signal and axial torque detection signal and have different input/output characteristics; a specimen characteristic acquisition unit for acquiring the value of the moment of inertia of the specimen connected to the dynamometer; and a resonance-suppression-controller selection unit for selecting one of the plurality of resonance suppression controllers on the basis of the value of the moment of inertia acquired by the specimen characteristic acquisition unit and mounting the selected resonance suppression controller in a dynamometer control module.

A test device for testing and commissioning comprehensive performance of a rotary drilling rig is provided. Dynamometer motors in the test device are provided on a foundation. A torque transmission gearbox is fixed on a gearbox anchoring plate through a gearbox adapter plate. A speed-increasing corner gearbox is provided on the torque transmission gearbox and connected to the dynamometer motors through a transmission shaft, a torque sensor, and a motor coupling sequentially. A drive sleeve is provided in a connecting shaft of the torque transmission gearbox. A lower end of the drive sleeve is connected to a hydraulic loading cylinder through a rotating bearing, a rotating support, and a tension-pressure sensor. The rotating support is fixed in the foundation. The hydraulic loading cylinder is connected to a hydraulic station through a hydraulic pipe. The tension-pressure sensor and a pressure control valve are connected to a computer software control system.

An input-side control device includes a first input signal generation unit for generating a first input signal on the basis of the deviation between an engine torque command signal and an input-side shaft torque detection signal; a second input signal generation unit for generating a second input signal on the basis of an input-side speed detection signal weighted according to a prescribed weighting signal; and a torque command signal generation unit for generating a torque command signal on the basis of the first and second input signals. If the value of a filtered signal obtained from the input-side speed detection signal is less than a prescribed threshold, the second input signal generation unit makes the value of the weighting signal lower than if the value of the filtered signal were greater than or equal to the threshold.

The invention relates to a test bed and a method for testing a real test object in driving operation, wherein the test object has at least one real component of a vehicle which is capable of applying torque to a wheel hub. The test bed comprises a load machine configured to be connected to the wheel hub so as to transmit torque, an actuator configured to generate a relative movement between the wheel hub on the one hand and a vehicle frame supporting the wheel hub on the other, simulation means for simulating the driving operation, wherein the simulation means is configured to simulate a virtual wheel and dynamics of the virtual wheel as if it were arranged on the wheel hub, and control means configured to operate the real test object in consideration of the simulated dynamics of the virtual wheel on the test bed.

The invention relates to a test bed and a method for testing a real test object in driving operation, wherein the test object has at least one real component of a vehicle which is capable of applying torque to a wheel hub. The test bed comprises a load machine configured to be connected to the wheel hub so as to transmit torque, an actuator configured to generate a relative movement between the wheel hub on the one hand and a vehicle frame supporting the wheel hub on the other, simulation means for simulating the driving operation, wherein the simulation means is configured to simulate a virtual wheel and dynamics of the virtual wheel as if it were arranged on the wheel hub, and control means configured to operate the real test object in consideration of the simulated dynamics of the virtual wheel on the test bed.

A six-DOF motion testing and motion parameter decoupling method for rotors based on shaft-disk is proposed, which includes a displacement sensor tooling and a precision shaft-disk fixed on the rotor where three measuring points are arranged on the surface of disk to measure the axial motion of the rotor, two measuring points on the shaft to measure the radial motion, and the angle encoder at the shaft shoulder to measure the rotation motion. The tooling guarantees the accuracy of displacement sensors. The fixed coordinate system and the shaft-disk moving coordinate system are set, and the measured values of the displacement sensors and the encoder are represented by vectors to establish the relationship between the six-DOF motion of the shaft-disk axis and the measured values of sensors. Thus, the six-DOF motion of the rotor/shaft-disk can be determined by the measured data.

A six-DOF motion testing and motion parameter decoupling method for rotors based on shaft-disk is proposed, which includes a displacement sensor tooling and a precision shaft-disk fixed on the rotor where three measuring points are arranged on the surface of disk to measure the axial motion of the rotor, two measuring points on the shaft to measure the radial motion, and the angle encoder at the shaft shoulder to measure the rotation motion. The tooling guarantees the accuracy of displacement sensors. The fixed coordinate system and the shaft-disk moving coordinate system are set, and the measured values of the displacement sensors and the encoder are represented by vectors to establish the relationship between the six-DOF motion of the shaft-disk axis and the measured values of sensors. Thus, the six-DOF motion of the rotor/shaft-disk can be determined by the measured data.

This design method is provided with a design process for a computer to design a μ controller satisfying a prescribed design condition in a feedback control system provided with the μ controller and a generalized plant. Set in the design process are: an integration operation amount calculation unit which calculates an integration operation amount; a summing unit which sums the output from the μ controller and the integration operation amount and generates an input to a nominal plant; a first control amount output port which outputs, as a first control amount output, an output obtained by multiplying the deviation input by a weight function Ge(s); and a second control amount output port which outputs, as a second control amount output, an output obtained by multiplying the output from the μ controller by a weight function Gip(s).

This design method is provided with a design process for a computer to design a μ controller satisfying a prescribed design condition in a feedback control system provided with the μ controller and a generalized plant. Set in the design process are: an integration operation amount calculation unit which calculates an integration operation amount; a summing unit which sums the output from the μ controller and the integration operation amount and generates an input to a nominal plant; a first control amount output port which outputs, as a first control amount output, an output obtained by multiplying the deviation input by a weight function Ge(s); and a second control amount output port which outputs, as a second control amount output, an output obtained by multiplying the output from the μ controller by a weight function Gip(s).