Question

SOLVE JUST PART B

The goal is to design controllers which will improve the efficiency of the elevator system, i.e., to enable fast positioning of the car without big vibrations which may lead to not only longer time for positioning (why?), but also safety risks or damage to environment and the machine itself a) Elaborate on how you would design feedback controllers to improve the efficiency of the elevating system. Lists several (at least two) sets of input-output variables for possible feedbaclk control systems, based on the figure shown above. What would be the p loop systems and how they would enhance the performance of the elevator? Answer in less than 5 lines. urpose of having closed- b) For one set of input-output variables Draw a block diagram of the closed-loop system similar to the following figure Clearly indicate the signal variables in the block diagram: controlled variable, possible disturbances, actuating signal, etc. (For instance, controlled variable can be the horizontal displacement of the car) Error or Actuating signal Disturbance Disturbance 2 Output Input or Reference Input transducer Process or Plant Controller Controlled Summing unction Summing unction Summingvriable junction Output transducer or Sensor

Answer 1

closed oop sys tem t's used tn elevato Υ becaus tt Complicated stiuctore in workin thoh thefeed ck ystem ast (S C CCrate Gp CS) closed Loop transler lunction Hcc CS) TCs CSRS CL