Proportional control

About: Proportional control is a research topic. Over the lifetime, 3756 publications have been published within this topic receiving 49050 citations.

Evolutionary design of PID controller for twin rotor multi-input multi-output system

Abstract: In this paper, a framework to automatically generate a set of parameters of PID (proportional, integral and derivative) controllers for the twin rotor multi-input multi-output system (TRMS) by using a simplified genetic algorithm (GA) is proposed. The simplified GA is proposed for tuning the PID parameters. The sequential search method is used to find the desired crossover point for the crossover operation. Finally, the optimal PID parameters are applied to the TRMS. Simulation results and experimental verification are demonstrated to show the effectiveness and performance of the proposed method.

Average current mode control of multi-phase switching power converters

Abstract: Exemplary embodiments are related to switching power converters. A switching power converter may comprise a plurality of control unit configured for average current mode control, wherein each control unit of the plurality comprises a dedicated proportional control unit. The switching power converter may further comprise an integrator coupled to each control unit of the plurality of control unit and configured to convey a signal to each control unit.

Iterative learning control for position tracking of a pneumatic actuated X-Y table

Abstract: The iterative learning control (ILC) learns the unknown information from repeated control operations. The tracking error from previous stages is used as the correction factor for the next control action. Therefore, the ILC controller can make the system tracking error converge to a small region within the limited numbers of iterations. A proportional-valve controlled pneumatic X-Y table system is built to perform the position tracking control experiments. The ILC controllers are implemented in the experiments and the results are compared. The P-type updating law with delay parameters are used for both the x and y axes in the repetitive trajectory tracking control. Experimental results show that the ILC controller can effectively control the system to track the given circular trajectory at different speeds. The controller parameters are varied for studying their effects. Inertial disturbance is also added to show the learning performance of the ILC controller.

Regulation characteristics of the digitally controlled DC-DC converter

Abstract: The output characteristics of the digitally controlled dc-dc converter is analyzed theoretically and experimentally and the regulation characteristics is steady-state is defined for the changes of the input voltage and the load. As a result, it is revealed that the regulation of the output voltage is often circumscribed within the comparative narrow ranges of the input voltage and the load, and that the circumscription of the regulation range is due to the overflow or the underflow phenomenon in the integral mode control circuit and can be satisfactorily extended by determining adequately the circuit parameters and variables in the digital feedback control circuit. Also, the transfer function between the small variations in the on-time interval of the switch and the output voltage of the dc-dc converter is defined, and then the proportional gain, the reset time and the rate time are approximately derived as a function of the proportional, integral and derivative (P-I-D) coefficients in the digital control circuit, respectively.