The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Tunable laser system requires high resolution and accuracy in position of the wave selective optical element, which can be attained through the use of stepper motor. This paper focuses on the stepper motor controller, with the feedback to improve the accuracy and the microstepping technique to improve the resolution. Sine cosine and trapezoidal current controlling techniques for the micro stepping...
IEEE 802.15.4 is a communication standard specifically designed targeting low power personal area networks. It provides MAC and Physical layer specifications for resource constrained networks like Wireless Sensor Networks(WSN). IEEE 802.15.4 MAC specification targets fairness as one of the design considerations. That creates a problem when IEEE 802.15.4 MAC is used for event driven WSN applications...
Compressors are the most important component of multipliers. Multipliers themselves are important components that dictate the overall performance of arithmetic circuits. In this paper, a new 4–2 compressor architecture is proposed. This architecture uses Carry Generator Module (CGEN) which has been used for 5–2 and 7–2 compressors already. The proposed architecture is compared with the best architecture...
We compare two commonly used normalizations for zero-forcing (ZF) precoded multi-user multi-input-multi-output (MU-MIMO) systems: equal transmit power (ETP) and equal receive power (ERP) normalization. Both have been proposed in the literature, but with no comparison of the performance in multipath fading channels. We show analytically, and through simulations, that the ETP normalization leads to...
The paper illustrates through the example of a mobile robot how discretization makes easier the design of a predictor based stabilizer for nonlinear dynamics with delayed input admitting finite sampled equivalent models.
The rolling mills are the complex mechatronics systems controlled by computer. Improper design and some other reasons may result in continuous vertical vibration of the mill stand. This vertical vibration that badly influences product quality is occurred due to self-excited vibration of the hydraulic AGC (auto-gauge control) system. This paper provides an integrated method to analyze design defects,...
Based on requirements of theory study and engineering application, a GPC (generalized predictive control) implicit adaptive algorithm was proposed that could adapt the system of time-varying parameters and rather large delay. The GPC algorithm adopted two identifiers to identify controller's parameters directly, so that it could omit computation of inverse matrix and Diophantine equations. As a result,...
The problem of optimal vibration control for time-delay systems is considered by using the sliding mode control approach. The delayed system is transformed into a non-delayed one by using functional transformations. The optimal sliding surface and the sliding controller are derived from a Riccati equation and a Sylvester equation. The feedforward control compensates for the effect of disturbance....
This paper has discussed observer-compensator control scheme of time-delay system, and pointed out that this scheme was some sensitive to gain variation of object. It proposed a kind of self-tuning OC (STOC) control scheme. Theoretical analysis and simulation results showed that STOC control scheme had a greater robustness and control quality more than OC control scheme; especially STOC control scheme...
This paper presents a control scheme of intelligent observation compensator on the basis of the control scheme of observation compensator by adding intelligent controller and intelligent switch. Thus the capability of tracking, anti-disturbance and stability of the system are enhanced. Theory analysis and simulation experiment show that the control scheme of intelligent observation compensator has...
In networked control systems (NCS) network-induced delays affect the performance of system and even cause instability. A discrete model of NCS was established in this paper, and a feedback control method based on forecast for State compensation was given in view of the model. The method was applied in a simulation model of inverted pendulum, and was confirmed to be effective .Finally, the paper points...
Artificial reverberator is now widely used in broadcasting station, television station, singing and dancing hall, etc. It plays an important role in beautifying music, sugaring singing, glorifying phonetic timbre and the artistic re-creation. It can also produce many kinds of special acoustics. However, artificial reverberator is a very complex system related with many important items especially its...
From the operation mechanism of the ball mill with double inlets and outlets, this paper gives a research work to the simulation of the ball mill with double inlets and outlets, and proposes a corresponding mathematical model of the six controlled with six control variables of the ball mill with double inlets and outlets, and simulates with Matlab using the operation data of a power plant. The result...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.