公开(公告)号：US10598688B2

公开(公告)日：2020-03-24

申请号：US16127302

申请日：2018-09-11

Applicant: I-SHOU UNIVERSITY

Inventor： Yuan-Wei Tseng ,  Rong-Ching Wu ,  Chia-Chuan Tsai

IPC: G01P15/00 ,  G01P15/09 ,  H01L41/08 ,  H01L41/04 ,  H03B5/32 ,  H01L41/113 ,  G05B13/02

Abstract: An oscillation control system includes an actuator, a sensor unit, and a control module. An actuator includes at least one piezoelectric material coupled with an electrode. The sensor unit is located on the actuator and is configured to detect an acceleration value of deformation of the actuator. A control module includes an operational unit and a gain unit. The operational unit generates an operational result according to the acceleration value and conditions of the actuator. The gain unit is coupled to the operational unit and the electrode and is configured to convert the operational result into a control signal which adjusts the actuator. An oscillation control method includes using a reciprocal state space system to proceed with closed-loop control of a state derivative feedback. The reciprocal state space system is represented by a plurality of equations.

公开(公告)号：US09748621B2

公开(公告)日：2017-08-29

申请号：US14983635

申请日：2015-12-30

Applicant: I-SHOU UNIVERSITY

Inventor： Chung-Long Pan ,  Rong-Ching Wu ,  Tsu-Chung Tan

IPC: H01P1/203

CPC classification number: H01P1/20363

Abstract: A step impedance resonator filter including a first resonator and a second resonator is disclosed. The first resonator includes a first coupled line and a first tapped line connected to the first coupled line. The second resonator includes a second coupled line and a second tapped line connected to the second coupled line. The second coupled line is coupled with the first coupled line. The first tapped line has a first central line which is spaced from an end face of the first coupled line at a first distance. The second tapped line has a second central line which is spaced from an end face of the second coupled line at a second distance. The first distance is larger than the second distance. As such, the performance of the step impedance resonator filter can be improved.

公开(公告)号：US10746631B2

公开(公告)日：2020-08-18

申请号：US15689880

申请日：2017-08-29

Applicant: I-SHOU UNIVERSITY

Inventor： Rong-Ching Wu

IPC: G01M99/00 ,  G01R31/34 ,  G06F17/17

Abstract: A method for estimating parameters of a DC machine by the least-squares method is performed by a computer system. The method includes establishing a transient model of the DC machine; expressing discrete values of the terminal voltage, the armature current and the rotational speed of the DC machine by the polynomial regression after the DC machine is started; obtaining estimated values of an armature resistance, an armature inductance and a back electromotive force constant by the least-squares method; calculating a torque based on the back electromotive force constant and the armature current; obtaining estimated values of a moment of inertia and a viscous friction coefficient by the least-squares method; and outputting the estimated values of the armature resistance, the armature inductance, the back electromotive force constant, the moment of inertia and the viscous friction coefficient. As such, the accuracy and reliability in estimating the parameters of the DC machine can be improved, achieving high computational efficiency and simplifying the operation procedure.

公开(公告)号：US10326396B2

公开(公告)日：2019-06-18

申请号：US15871229

申请日：2018-01-15

Applicant: I-SHOU UNIVERSITY

Inventor： Rong-Ching Wu

IPC: G05B19/18 ,  H02K11/02 ,  H02P11/04 ,  H02P21/14 ,  H02P23/14

Abstract: A method for estimating parameters of a direct current machine by Laplace transform performed by a computer system. The method includes establishing a transient model of the DC machine and a transfer function based on the transient mode; transforming the transfer function from the time domain to the frequency domain by the Laplace transform to obtain each of an armature current and a rotational speed of the DC machine as a function of frequency; expressing the armature current and the rotational speed as polynomial fractions by polynomial regression, and comparing the functions of the frequency and the polynomial fractions to output values of the armature resistance, the armature inductance, the back electromotive force constant, the moment of inertia and the friction coefficient. As such, the accuracy and operational efficiency in estimating the parameters of the DC machine can be improved.

公开(公告)号：US09774068B2

公开(公告)日：2017-09-26

申请号：US14983648

申请日：2015-12-30

Applicant: I-SHOU UNIVERSITY

Inventor： Chung-Long Pan ,  Rong-Ching Wu ,  Tsu-Chung Tan

IPC: H01P1/203 ,  H03H7/38

CPC classification number: H03H7/38 ,  H01P1/20363

Abstract: A filter configuration including a substrate, a primary microstrip line and a first defected ground structure is disclosed. The substrate has a first face and a second face. The second face is a ground face. The primary microstrip line is arranged on the first face and extends in a first direction. The first defected ground structure is arranged on the second face. The first defected ground structure includes a first section, a first circular section, a second section, a second circular section and a third section that are connected to each other in sequence in a second direction perpendicular to the first direction. The second section is covered by the primary microstrip line in a vertical direction perpendicular to the first and second faces. The primary microstrip line has a width equal to a minimum length of the second section. As such, the filtering effect can be improved.