Control systems can be subject to outside inputs, environmental effects, disturbances, and sensor/actuator inaccuracy. To model such systems, linear differential equations with constrained inputs are often used, ẋ(t) = Ax(t) + Bu(t), where the input vector u(t) stays in some bound. Simulating these models is an important tool for detecting design issues. However, since there may be many possibl...

A novel architecture for loser-take-all functions is proposed. Inputs and outputs of the circuit are currents, which make the circuit appropriated for low-voltage neural hardware computation. In contrast to most existing realisations the circuit does not require subtraction from a fixed reference what decreases accuracy and input dynamic. Moreover, in addition to the loser, it also outputs the ...

In this paper, we investigate convergence of state output for a class of delayed recurrent neural networks with impulsive effects. Based on properties of time-varying inputs and monotonicity of activation function, we establish some sufficient conditions to guarantee output convergence of the networks in which state variable subjected to impulsive displacements at fixed moments of time.

This paper investigates the stabilization problem for interconnected linear time-invariant (LTI) time-delay system by means of a linear time-invariant output feedback decentralized controller. The delays are assumed to be commensurate and can appear in the states, inputs, and outputs of the system. First, the canonical forms for time-delay systems with commensurate delays are introduced and cen...

Efficiency evaluation is one of the major issues in urban transportation. Since the efficiency of the systems is affected by its data and output, what makes the results of the performance evaluation valid and applicable, is selecting the appropriate data and outputs of the system. In this study, the efficiency of the subway stations in Tehran in case of return, compared to the fixed scale, is m...

In order to investigate the effects of non-linear springs in vibrating behavior of vehicles, the independent suspension of conventional vehicles could be modeled as a non-linear single degree of freedom system. The equation of motion for the system would be a non-linear third order ordinary differential equation, when considering the elasticity of rubber bushings in joints of shock absorber. It...

‎The purpose of this paper is to offer the equitable method for ranking Decision Making Units(DMUs) based on the Dynamic Data Envelopment Analysis (DDEA) concept, where quasi-fixed inputs or intermediate products are the source of inter-temporal dependence between consecutive periods. In fact, this paper originally makes the use of an approach extending the ranking of DMUs in DEA by Khodabakhsh...

‎the purpose of this paper is to offer the equitable method for ranking decision making units(dmus) based on the dynamic data envelopment analysis (ddea) concept, where quasi-fixed inputs or intermediate products are the source of inter-temporal dependence between consecutive periods. in fact, this paper originally makes the use of an approach extending the ranking of dmus in dea by khodabakhsh...

The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. This paper presents the design, analysis and experimental testing of a variable-pitch quadrotor. A custom in-lab built quadrotor with on-board attitude stabilization is developed and tested. An analysis of the dynamic differences in thrust output between a fixed-pitch and varia...

This paper presents the design, analysis and experimental testing of a variablepitch quadrotor. A custom in-lab built quadrotor with on-board attitude stabilization is developed and tested. An analysis of the dynamic differences in thrust output between a fixed-pitch and variable-pitch propeller is given and validated with simulation and experimental results. It is shown that variable-pitch act...