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.
Various control strategies for power regulation in variable-speed wind turbines commonly assume that the whole system parameters are known and available, which is not necessarily satisfied in practice. In this work, an adaptive control strategy, which neither need to know completely the system parameters nor the rotor acceleration, is proposed for power regulation and tracking. It also includes a...
An anti-slip method for locomotives using improved adhesion characteristic curve slope method is proposed to solve the problem of low stability and control precision of the original adhesion characteristic curve slope method, it's adopting differentials of adhesion coefficient and slip speed as the identification criterion for locomotive states. The relationship among locomotive adhesion, resistance,...
The article describes the search for optimal motion path of the positional electric drive under conditions of an indefinite (statistical) characteristics of the load. It is shown that the triangle is the optimum shape of the speed curve, and the ratio of its sides depends on the type of the load diagram, in particular on the influence of the main drive of the pilgering mill, and is independent on...
During car services, it is sometimes necessary to measure the effective performance of the engines. After repairs it is very useful to check the change of the performance. In this case you don't have possibility of dismantling. You can measure the vehicle on roll benches. In this case you have so-called wheel performance as result. The new method discussed and described in this article provides a...
In 2015, InnaLabs reported on the development of a range of specialist, precision Quartz Pendulous Accelerometers. The performance requirement for these accelerometers was a key design driver for meeting the market needs within the tactical and the navigation grade market segments. In order to extend InnaLabs offering to cutting edge, volume applications with more stringent and highly dynamic environments...
BEMF-based methods, with the purpose of estimating the position and speed of the permanent magnet synchronous machine (PMSM), cannot be applied in low- speed range. Though the high frequency injection (HFI) methods can be operated in low- speed range, they are complicated. For low cost SPMSM applications, it is not necessary to be operated in low- speed range. Thus, an I-f starting method was introduced...
Conventional electronic stability control (ESC) system uses differential braking to stabilize the yaw rate and side slip of the vehicle motion. While the roll stability is critically important, it is absent from the current ESC scheme. In this paper, an model predictive control (MPC) scheme is proposed that potentially can achieve both yaw stability and roll stability. The objective of the proposed...
This paper presents a model based robust control scheme for tail-sitter hybrid Unmanned Aerial Vehicles (UAVs) in forward transition phase. To tackle the problem from high nonlinearity and uncertainties in transition dynamics, a comprehensive model form is constructed, and a so-called Robust Perfect Tracking (RPT) control method is utilized in attitude tracking. Experiment results are given to demonstrate...
In order to meet the requirement of rapid attitude maneuver control and vibration suppression of flexible spacecraft with disturbance and uncertainty, this paper presents a robust control scheme based on path planning and adaptive backstepping control. Firstly, a novel path planning scheme is proposed based on quintic polynomial transition. The continuous and smooth maneuver path is designed to solve...
The article considers the problems of mathematical development and computer modeling of the angle setting block for positional electric drives in robotic devices. The angle setting unit is composed of three closed loops. The first (inner) circuit provides the dynamic torque limit and the required acceleration. The integration of the output value of the inner loop determines a given motor speed. The...
A wheeled inverted pendulum cannot balance without control, and it is important to save motion in a control range. In some situations, however, to avoid a collision, the maximum acceleration and deceleration must be applied. A motion-planning method for a wheeled inverted pendulum (“body” hereafter)-which uses full performance from all attitudes under hardware constraints-was developed. The developed...
This paper analyses a torque control structure for load machine used as a dynamometer. Typical area of the use is a mimicking of a mechanical load behaviour in case the mechanical load is not available. Instead of that, the mechanical load is emulated by the load machine with specific torque control. This approach belongs to dynamic emulation of mechanical load methods. Reference torque calculation...
This paper proposes a vehicle stability controller based on the “g−g” diagram, abbreviated as “g2-VSC”, which improves vehicle handling and dynamic response during critical driving situations. Based on a predefined operation region in the “g−g” diagram, the introduced controller determines the corrective yaw moment. Both differential braking and driving torque distribution are considered for generating...
High-altitude gliding unmanned underwater vehicles (HAGUUVs) are released in high attitude and works in water after a short glide in the air. According to the High-altitude Gliding UUV airborne emission requirements, the folding mechanism of wings of the HAGUUV is desighed. On the basis of mechanics analysis of the organization, the dynamics modeling of organization's unfolding process is given by...
This article deals with the design and modeling of PID regulators with two degrees of freedom for the thermal phase of the hybrid vehicle. It shows how to regulate the speed of a vehicle using a PID control with two degrees of freedom with a set point weighting. Two main objectives of this controller are tracking set points and rejecting load disturbances at the same time. A number of control algorithms...
A comparative study has been made incorporating PI and Fuzzy Logic Controllers in the design of a speed controller for a DC motor. Considering the merits and demerits of each of these, a self-tuned Fuzzy-PI hybrid controller has been proposed, to eliminate the setbacks of the former Controllers. The rationale for the above is provided by modeling a DC Motor in MATLAB Simulink and noting that better...
In 2015, InnaLabs reported on the development of a range of specialist, precision Quartz Pendulous Accelerometers [1]. The performance requirement for these accelerometers was a key design driver for meeting the market needs within the tactical and the navigation grade market segments. In order to extend InnaLabs offering to cutting edge, volume applications with more stringent and highly dynamic...
A brief analysis on the operating characteristic of separable starting process between driving motor and load operation is made. Firstly, the existing problem of coordinating the jerk level and transmitted torque at the clutch lock-up time is illustrated. To further improve the torque capacity, pedal throttle is adjusted while clutch is engaging. And contrasts are made between the variable-idle speed...
This paper deals with the problem of trajectory generation with a motion profile in joint space, the motion profile is a mathematical function that affect the performances of the robot such as the optimization of energy, optimization of time and especially the continuity of movement, in robotics we have three problems to solve, modeling, control and trajectory planning, in this work we developed a...
In 2015, InnaLabs reported on the development of a range of specialist, precision Quartz Pendulous Accelerometers [1]. The performance requirement for these accelerometers was a key design driver for meeting the market needs within the tactical and the navigation grade market segments. In order to extend InnaLabs offering to cutting edge, volume applications with more stringent and highly dynamic...
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.