Journal of Majlesi Journal of Mechatronic Systems
Volume:2 Issue: 3, Sep 2013

In this paper elimination of the severe load disturbance exerted on a DC servo drive using Optimal Integral Sliding Mode Control (OISMC) method is addressed. The performance of the proposed algorithm is compared with Optimal Integral Tracking Control (OITC) and Lyapunov based Model Reference Adaptive Control (LMRAC). Simulation results demonstrate the superior performance of the OISMC algorithm fulfilling the aim of this research among the studied control strategies. According to the achievements of this study the ability of the proposed method as an effective control strategy for the precise servo drive speed or position control purposes, imposed to harsh load disturbances is obvious.

Guidance and control laws of anti-tank missile are recorded in a missile subsystem called flight computer. The flying missile diagnoses the right path using these laws(guidance) and gives essential orders according to them to put the missile in its right path(control). like all real systems, the performance of this subsystem may be perturbed by different reasons leading to a derivative of reasonable functions.In this paper, after identifying15 important ones of these reasons, their effects on missile miss distance which is a measurable and appropriate factor is investigated.In the guidance of this anti-tank missile, pure proportional navigation guidance law is used. The main focus of this paper is on analyzing effect of errors on this law.Finally, the intensity of these reasons on miss distance rate are presented by column diagrams.

The presented paper studies different types of strategies for Switched Reluctance Motor (SRM) controlling. In SRM control, the rotor position is the most important parameter which all controlling methods try to achieve it. Two strategies are used in SRM driving: direct and indirect strategies. Direct strategies use position detection sensors in order to detect the rotor position. Indirect techniques don’t use any detection sensor and rotor position find out by using the relationship between some parameters of the motor like phase current, coil flux, etc. Indirect strategies have many advantages over direct strategies but their implementation is more complex. The most attractive SRM controlling methods are studied and explained in this paper and at the end the best methods are introduced based on the best efficiency, simplicity and cost.

Periodontal polishing is the act of smoothing the tooth surface and performed by hand-piece device and addition of prophylaxis paste onto the bristle brush by the dentist. Disadvantages of this technique include non-uniform cleaning of tooth surface and removal of dental deposits including dental plaque and long duration of head substitution due to paste running out and other factors. To solve this problem, a new machine was designed capable of adding the prophylaxis paste to the hand-piece apparatus head automatically. This setting injects the prophylaxy paste into the target point with pneumatic automatic control system. This paper deals with design and fabrication of pneumatically operated automatic paste machine. The pulse and pressure system control for pneumatic system were designed and implemented. The manually operated machine is converted into a pneumatically operated machine by applying proper ergonomically design procedure. Findings support the use of automatic pneumatic paste injection instrumentation over the traditional hand paste polishing.

This paper is the nonlinear adaptive feedback linearization control of a class of multi-input multi-output (MIMO) nonlinear systems called “system of ball on a sphere”, which is designed to control and operate a ball on the top of a sphere. Nowadays, Control of nonlinear systems using the feedback linearization has attracted lots of attention in the nonlinear control theory. Since in the general case, there is uncertainty with respect of these nonlinear systems parameters, Adaptive feedback linearization is employed to obtain asymptotically accurate cancellation for this inherent uncertainty The system’s dynamic is described and the equations are illustrated. The results are simulated and compared in toe directions. The outputs are shown in different figures so as to be compared. These simulation results show the exactness of the controller’s performance.

This paper presents a formation controllaw for a group of three double-integrator modeled agents. We suggest a controllaw based on the gradient control law of a potential function between eachagent. A constant parameter is designed to make a non-oscillating trajectoryfor each agent around equilibrium point. LaSalle''s invariant principle isapplied to prove that triangular formations are globally asymptotically stableunder the proposed control law. Finally, simulation results are given todemonstrate the effectiveness of the proposed algorithm.