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Ali Zamani

3 accepted papers

2020

Nonlinear model predictive control of hopping model using approximate step-to-step models for navigation on complex terrain

IROS 2020poster

We consider the motion planning problem of a hopper navigating a terrain comprising stepping stones while optimizing an energy metric. The most widely used approach of discrete searches (e.g., A-star) cannot handle boundary conditions (e.g., end path constraints on position, velocity). However, cont…

Cited by 7Source ↗Scholar ↗
2019

Feedback motion planning of legged robots by composing orbital Lyapunov functions using rapidly-exploring random trees

ICRA 2019poster

We present a sampling-based framework for feedback motion planning of legged robots. Our framework is based on switching between limit cycles at a fixed instance of motion, the Poincaré section (e.g., apex or touchdown), by finding overlaps between the regions of attraction (ROA) of two limit cycles…

Cited by 10Source ↗Scholar ↗
2017

Foot placement and ankle push-off control for the orbital stabilization of bipedal robots

IROS 2017poster

The main motivation of this paper is to understand the role of foot placement and ankle push-off control in stabilizing bipedal gaits. We modify the simplest walker (heavy torso, light legs) by incorporating a hip spring, a hip actuator, and a telescopic linear actuator. We consider two stability cr…

Cited by 17Source ↗Scholar ↗