نتایج جستجو برای: robust task space control
تعداد نتایج: 2168843 فیلتر نتایج به سال:
abstract the present study was conducted in order to investigate the impact of an integrated model of form-focused and task-based instruction on iranian efl learners vocabulary learning and retention.it also aimed to detect efl learners attitude towards the implementation of form-focused task-based vocabulary instruction in the classroom. in order to address the purposes of this study, a sampl...
Robust control approaches have been extensively developed to control robot manipulators in joint-space. Even though they can present perfect tracking performances in joint-space, they cannot provide satisfactory performances in workspace under imperfect transformation of control space. In addition, many task-space approaches have assumed the perfect transformation, which is not real with presen...
Key Words-Parameter-dependent Lyapunov functions; constant real parameter uncertainty; robust stability and performance. Almhmct-Parameterodependent Lyapunov functions are developed for discrete-time systems with constant real parameter uncertainty. This construction of a family of Lyapanov functions is then used to analyze robust stability with He performance bounds for state space systems. A ...
The celebrated small-gain approach to robust control only makes use of the gain information of uncertainty. This results in a limitation on the achievable control bandwidth in system design. On the other hand, the alternative passivity approach has only limited applications. To relax the limitations associated with small-gain and passivity approaches, we explore the possibility of utilizing bot...
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
learning-oriented assessment seeks to emphasise that a fundamental purpose of assessment should be to promote learning. it mirrors formative assessment and assessment for learning processes. it can be defined as actions undertaken by teachers and / or students, which provide feedback for the improvement of teaching and learning. it also contrasts with equally important measurement-focused appro...
In this paper, a robust controller is developed for mobile manipulator (MM) to track reference position/force trajectories. Nonholonomic and holonomic constraints are considered the platform manipulator, respectively. Additionally, control design considers uncertainties in parameters of dynamics with bounded time varying additive disturbance (unmodelled effects, external disturbances). A Lyapun...
Task-space quadratic programming (QP) is an elegant approach for controlling robots subject to constraints. Yet, in the case of kinematic-controlled (i.e., high-gain position or velocity) robots, closed-loop QP control scheme can be prone instability depending on how gains related tasks constraints are chosen. In this article, we address such shortcomings. First, highlight nonrobustness system ...
this study investigated the effect of prior knowledge on the listening comprehension performance of fl learners. twenty students, male and female, drawn from the two intact groups of the senior and junior english language and literature majors were chosen as the participants of this study . the two groups were then randomly assigned into the experimental and control group. the experimental gr...
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