Papers by Keyword: PID

Abstract: A hardware-in-the-loop (HIL) platform for unmanned air vehicle (UAV) systems is designed that demonstrates flight attitudes on yaw, pitch and roll axes. The design combines a sophisticated flight simulation software with a platform capable of moving 360 degrees on all axes. This enables the testing of the flight sensors and autopilot algorithms for all sorts of scenarios including emergency and acrobatic cases where an indefinite number of full rotations in the yaw, roll and pitch might take place.

Abstract: Electro-hydraulic actuators are widely used in motion control application. Position control using hydraulic systems is widely applied in several engineering fields. However, their design is not a simple task since it is necessary to observe their behavior according to control theory.This paper represents an implementation of motion control of electro-hydraulic actuator by using PID controller. The objective of this study was to obtain Physical model of an electro-hydraulic actuator using system identification technique by estimating model using AMESim and provide the electro-hydraulic system which depends the hydraulic actuators to meet the motion control system demands.The physical model of electro-hydraulic actuator is established; it was modeled and simulated by using advanced performance modeling and simulation environment AMESim. It is shown that using AMESim to model and simulate performance more directly and veritably, and can complete the design task accurately and quickly.

Abstract: Japan is becoming a super-aging society, with a population decrease and a shortage of young workers. Mechanisms using pneumatic cylinders are therefore expected to be useful to perform tasks such as day-to-day work support for elderly people. However, pneumatic cylinder includes large dead time. Thereby, traditional control system is complex, such as adding Smith compensation. Therefore, we use Predictive Functional Control (PFC). This control system is not complex even if plant includes dead time. This study evaluates the performance of force and position control systems using a pneumatic cylinder and PFC. We compare the PFC scheme with the PID control and show that PFC achieves better performance than PID control.

Abstract: An airflow control system is one of important parts in the scanning mobility particle sizers system (SMPS) used in the field of aerosol and air filtration. In this paper, the air flow control system that consists of an air filter, a blower, an air flow sensor, a controller, and a computer are reported. A flow rate adjustment was performed by varying the rotation speed of the blower using a pulse width modulation (PWM) technique. The air flow sensor capable of measuring flow rate up to 20 liters / min was used to measure the air flow rate. In order to keep at a certain value of the flow rate, a proportional-integral-derivative (PID) control action was employed in which PID controller were manually tune. The results showed that the desired value of flow rate was quickly achieved with little overshoot was observed in the system output.

Abstract: This paper investigates the effectiveness of piezostack actuator in attenuating the frequency dependent excited vibration of a suspended handle. A shaker is used to produce a base excitation to the suspended handle and a piezostack actuator is used to generate the vibration cancellation for the handle. The investigation covers vibration operating frequency from 50 to 500 Hz. This study also looked at the initial performance of piezostack actuator for the AVC system. A PID controller is design to generate the counter voltage for the piezostack actuator to attenuate the vibration of the handle. The results show that the highest vibration attenuation of the suspended handle occurred at operating frequency of 450 Hz with 90 % of vibration attenuation and the lowest at 50 Hz with 2.4 % of vibration attenuation.

Abstract: An efficient controller named Intelligent PID is proposed based on hybridization between original PID tuning methods and fast genetic algorithm (FGA) to enhance the transient response of automatic voltage regulator (AVR) in synchronous machine. PID controller has several advantages compared with another controller, but it’s susceptible to the local minima problem and does not give sufficient output response. Therefore, FGA is used here to overcome this problem and to enhance the output response. The performance of the proposed controller is tested and compared with the original PID controller. The results demonstrate that, the intelligent PID is an effective controller to enhance the transient voltage response of AVR system.

Abstract: For the shortcomings of large overshoot and poor anti-disturbance ability when using the traditional PID control, ADRC control algorithm that is a nonlinear state error feedback control algorithm has been proposed in the sophisticated control system of static reactive power generator. The simulation results show that the algorithm can make the system reactive power compensation more quickly and more effectively, therefore the control strategy is feasible.

Abstract: As one of the most important parameters of Direct Current (DC) power supply, Load regulation determines the performance of whole system. In this paper, the internal structure as well as performance parameters of LM2577 boosting converter were deeply investigated and based on this investigation we proposed two new methods of improving its Load Regulation. One method (method 1) is to replace the resistor connected to the feedback pin of LM2577 with a programmable potentiometer and sample the variation of output voltage using an AD converter. The potentiometer is adjusted under the control of feedback algorithm to keep the output voltage stable, thus the load regulation enhanced. In the other method (method 2), the feedback pin of LM2577 is connected to an adder to stabilize the output voltage of DC power supply and increase the load regulation. A voltage divider made up of resistors divides the output voltage and provide the divided voltage to one input of the adder. The other adder input comes from DA converter controlled by microcontroller. To reduce the adjust time and increase the efficiency, PID algorithm is applied in the software part of the system. We use 12-bit AD (ADS1115), 12-bit DA (TLV 5638) and 10-bit programmable potentiometer (AD5293) to test the methods above under the condition of 5V input voltage and 600mA load current. When output is set to 7V, the load regulation is improved from 1.043%, the rate from application circuit in LM2577’s Datasheet, to 0.700% and 0.042% by applying the first and second method, respectively. When output voltage equals 12V, the improvement is from 0.658% to 0.008% and 0.008%. Meanwhile, the method 2 suppresses output voltage ripple to be less than 10mV.

Abstract: According to the time-varying and nonlinear characteristics of fluid, this paper puts forward a design scheme of real-time and accurate control of the liquid flow. The control system which taking the programmable logic controller (PLC) as the platform and using the PID control algorithm is composed with the touch screen, electromagnetic flow meter, temperature sensor, electric regulating valve system and so on. And the PID algorithm based on PLC design has carried on the analysis, simulation and optimization. The results show that PID algorithm is designed using this method with a strong and more precise control of the scheme. It is not only suitable for the flow control, changes in action after the equipment is also applicable to analog volume control temperature, liquid level, velocity, height etc.

Abstract: According to the characteristic of the coke oven process, the IGPC is applied on it. And an improvement is made on the implicit GPC. Introducing the soft coefficient matrix and making up the control increment decrease the calculation. And also, it can restrain overshoot of the output. Finally, the simulation results confirm that the implicit GPC is better than PID control algorithm.