Advantages - Disadvantages

3.4 Advantages - Disadvantages - Catalogue

Solution Components

A Sub-Function: Measure pedal movement

A.1- Potentiometer

Fig: Potentiometer setting via rack in a wah pedal (source)

Advantages	Disadvantages
Cheap
Ready-made variants available in pedal form

A Subfunction: Measurement of pedal movement

A.2 - Inductive displacement sensor

Fig. Inductive displacement sensor(Source)

Advantages:	Disadvantages:
	Expensive
	Implement connection to pedal

A Subfunction: measure pedal movement

A.3 -Incremental encoder

Advantages:	DIsadvantages:
Direction of rotation could be used as an input variable by the user of the pedal	More expensive than potentiometers

B Subfunction: Process input data and derive actuator signal

B.1 Microcontroller

Fig: Mikrocontroller ESP32 LOLIN (Source)

Advantages:	Disadvantages:
Cheap
More energy efficient
flexible application possibilities

B Subfunction: Process input data and derive actuator signal

B.1 Programmable logic controller

Fig: Programmable logic controller

Advantages:	Disadvantages:
	Program processing cyclically with lower frequency
	Expensive

C Partial function: reduce free cord length

C.1 Winding the line on a winch by means of a motor

Fig: Line coiled on winch (Source)

Advantages:	Disadvantages:
Conversion of translational movement into rotational movement
Clean line storage without knotting

D Subfunction: increase free cord length

D.1 Mechanical freewheel

Fig: Sleeve freewheel(Source)

Advantages:	Disadvantages:
low mass
lowest possible moment of inertia during climb, as other parts remain unmoved

D Subfunction: reduce free cord length

D.2 Turning of the drive unit (winch wheel to rotor of the motor)

Fig.: Stepper motor with coupling on a shaft (Source)

Advantages:	Disadvantages:
few components needed	Motor will apply counter-torque
Revolutions in climb could be determined --> rope length could be determined in the system

E Subfunction: Torque transmission from drive to winch

E.1 - mounting the winch on a shaft; The shaft is driven by a bellows coupling

Fig: Bellows coupling(Source)

Advantages:	Disadvantages:
Rigid connection, no loss of kinetic energy through damping in elastic components	high accuracy requirements for the assembly of the shafts (axial, radial & angular dimension)

E Subfunction: Torque transmission from the drive to the winch

E.2 - mounting the winch on a shaft; The shaft is driven by a double loop clutch

Fig: double loop Coupling (Source)

Advantages:	Disadvantages:
anti-vibration	Speed limitation (usually up to 3000 rpm)
Inaccuracies when aligning the shafts do not endanger concentricity

E Subfunction: Torque transmission from the drive to the winch

E.3 - Motor shaft to shaft connection with winch via belts

Fig: Belt connection and with drive (Source)

Advantages:	Disadvantages:
	higher number of components: transmission pinion, more roller bearings

F Subfunction: Motor variant

F.1 - DC motor

Abb.: Dc Motor(Source)

Advantages:	Disadvantages:
higher speeds can be achieved
faster response time compared to a stepper motor

F Subfunction: Motor variant

F.2 - Stepper motor

Abb.: Stepper motro Nema 17 (Source)

Advantages:	Disadvantages:
no rotary encoder necessary	speeds limited
easily controllable via microcontroller

F Subfunction: Motor variant

F.3 - Servomotor

Abb.: Servomotor (Source)

Advantages:	Disadvantages:
Accurate positioning	usually no continuous rotations
accurate position feedback	speeds limited

G Subfunction: line guide for flight near the ground (takeoff and landing)

G.1 - Elevation of the drone by landing gear

Fig: Elevation of the drone by landing gear(Source)

Advantages:	Disadvantages:
Increasing the distance between the rotors and the line lying on the ground --> less likely to get caught	additional weight for the drones
low mass	possibly slight negative impact on flight duration

G Subfunction: line guide for flight near the ground (takeoff and landing)

G.2 - Loading on elevated platform

Fig: Elevated landing platform (Source)

Advantages:	Disadvantages:
Erhöhung Abstand zwischen Rotoren und auf Boden aufliegender Schnur --> "Verfangen" unwahrscheinlicher	Mobilität des Aufbaus deutlich reduziert

G Subfunction: line guide for flight near the ground (takeoff and landing)

G.3 -Line guide through eyelet near the bottom

Fig: Eyelet(ring) that can be brought close to the ground during takeoff and landing (Source)

Advantages:	Disadvantages:
Easy to use	Eyelet must be folded up during operation to avoid increased friction
Ensuring that line is kept away from rotors at a favorable angle

H Sub-function: energy supply of the system

H.1 - a battery for the supply of the data processing unit and a battery for the motor

Fig: Separate batteries for microcontroller and motor

Advantages:	Disadvantages:
simple interconnection	costly
Batteries can be replaced individually if there is a high energy requirement

H Sub-function: energy supply of the system

H.2- One battery for the entire system with use of optocouplers

Advantages:	Disadvantages:
only one battery required	more complex wiring
inexpensive

I Sub-function: energy supply of the drone(on the drone)

I.1 - Directly replace the original drone battery with the power supply via a cable

Fig: Power supply with a cable(without battery)

Advantages:	Disadvantages:
Allow light weight system	DJI Mavic 2 has an intelligent battery which allow to start the drone. So we would need to install and program a microcontroller to turn the drone on.
No flight time limitation	Complex system

I Sub-function: energy supply of the drone(on the drone)

I.2- STARTRC For DJI Mavic 2 Battery Extended Adapter to extract an input power with Drone battery

Fig: Power supply via STARTRC adapter (with battery)

Advantages:	Disadvantages:
Don´t need to remove the original battery	More weight
No flight time limitation

J Sub-function: Energy supply of the drone(on the ground)

J.1 - Sliding electrical contact

Fig: Sliding Contact BQLZR

Advantages:	Disadvantages:
Transfer of energy	wear of sliding contacts
Rotating connection

J Sub-function: Energy supply of the drone(on the ground)

J.2- Inductive power supply

Fig: Wireless power supplier

Advantages:	Disadvantages:
Non-contact transmitter reciever	Large surface for energy
	loss of energy